MAXIM MAX4358ECE

19-2111; Rev 0; 8/01
32 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
Features
♦ 32 ✕ 16 Nonblocking Matrix with Buffered Inputs
and Outputs
♦ Operates from a ±3V, ±5V, or +5V Supply
♦ Fast Switching (40ns) 2:1 OSD Insertion Mux
♦ Each Output Individually Addressable
♦ Individually Programmable Output Buffer Gain
(AV = +1V/V or +2V/V)
♦ High-Impedance Output Disable for Wired-OR
Connections
♦ 0.1dB Gain Flatness to 12MHz
♦ Minimum -62dB Crosstalk, -110dB Isolation at
6MHz
♦ 0.05%/0.1° Differential Gain/Differential Phase
Error
♦ Low 195mW Power Consumption (0.38mW per
point)
Ordering Information
PART
MAX4358ECE
TEMP RANGE
PIN PACKAGE
-40°C to +85°C
144 TQFP
Pin Configuration appears at end of data sheet.
Functional Diagram
Applications
Security Systems
OSDFILL1
OSDFILL0
OSDFILL15
Video Routing
Video-On-Demand Systems
MAX4358
Typical Operating Circuit
IN1
CAMERAS
IN0
IN1
IN31
IN2
AV*
IN31
AV*
RESET
OUT1
POWER-ON
RESET
THERMAL
SHUTDOWN
DISABLE ALL OUTPUTS
MAX4358
OUT1
OUT2
512 16
OUT15
16
VCC
MONITOR
VEE
AGND
VDD
DGND
DECODE LOGIC
OSDFILL0
OSD GENERATOR
AV*
2:1
OSD
MUX
OUT0
MONITOR
DIN
SCLK
UPDATE
CE
OSDKEY0
OSDFILL1
32 x 16
SWITCH MATRIX
OUT0
ENABLE/DISABLE
AV*
IN0
OUT15
OSDKEY1
SERIAL
INTERFACE
LATCHES
MATRIX REGISTER
112 BITS
DOUT
UPDATE REGISTER
16 BITS
AOUT
MONITOR
OSDFILL15
OSDKEY15
*AV = +1V/V OR +2V/V
A0-A3 MODE
OSDKEY0
OSDKEY15
OSDKEY1
SPI/QSPI are trademarks of Motorola, Inc.
________________________________________________________________ Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1
MAX4358
General Description
The MAX4358 is a 32 ✕ 16 highly integrated video
crosspoint switch matrix with input and output buffers
and On-Screen Display (OSD) Insertion. This device
operates from dual ±3V to ±5V supplies or from a single +5V supply. Digital logic is supplied from an independent single +2.7V to +5.5V supply. Individual
outputs can be switched between an input video signal
source and OSD information through an internal, dedicated fast 2:1 mux (40ns switching times) located
before the output buffer. All inputs and outputs are
buffered, with all outputs able to drive standard 75Ω
reverse-terminated video loads.
The switch matrix configuration and output buffer gain
are programmed through an SPI/QSPI™-compatible,
three-wire serial interface and initialized with a single
update signal. The unique serial interface operates in
two modes facilitating both fast updates and initialization. On power-up, all outputs are initialized in the disabled state to avoid output conflicts in large-array
configurations.
Superior flexibility, high integration, and space-saving
packaging make this nonblocking switch matrix ideal
for routing video signals in security and video-ondemand systems.
The MAX4358 is available in a 144-pin TQFP package
and specified over an extended -40°C to +85°C temperature range. The MAX4358 evaluation kit is available
to speed designs.
MAX4358
32 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
ABSOLUTE MAXIMUM RATINGS
Analog Supply Voltage (VCC - VEE) .....................................+11V
Digital Supply Voltage (VDD - DGND) ...................................+6V
Analog Supplies to Analog Ground
(VCC - AGND) and (AGND - VEE) ..................................... +6V
Analog Ground to Digital Ground .........................-0.3V to +0.3V
IN__, OSDFILL__ Voltage Range .... (VCC + 0.3V) to (VEE - 0.3V)
OUT__ Short-Circuit Duration to AGND, VCC, or VEE ....Indefinite
SCLK, CE, UPDATE, MODE, A_, DIN, DOUT,
RESET, AOUT, OSDKEY__..........(VDD + 0.3V) to (DGND - 0.3V)
Current Into Any Analog Input Pin (IN_, OSDFILL_).........±50mA
Current Into Any Analog Output Pin (OUT_).....................±75mA
Continuous Power Dissipation (TA = +70°C)
144-Pin TQFP (derate 28.6mW/°C above +70°C).........2.23W
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) ................................ +300°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
DC ELECTRICAL CHARACTERISTICS—DUAL SUPPLIES ±5V
(VCC = +5V, VEE = -5V, VDD = +5V, AGND = DGND = 0, VIN_= 0, VOSDFILL_ = 0, RL = 150Ω to AGND, and TA = TMIN to TMAX,
unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
Operating Supply Voltage
Range
Logic Supply Voltage Range
Gain (Note 1)
SYMBOL
VCC VEE
Guaranteed by PSRR test
VDD to
DGND
AV
Gain Matching
(Channel to Channel)
Temperature Coefficient of Gain
CONDITIONS
MIN
TYP
MAX
UNITS
4.5
10.5
V
2.7
5.5
V
(VEE + 2.5V) < VIN_ < (VCC - 2.5V),
AV = +1V/V, RL = 150Ω
0.97
0.995
1
(VEE + 2.5V) < VIN_ < (VCC - 2.5V),
AV = +1V/V, RL = 10kΩ
0.99
0.999
1
(VEE + 3.75V) < VIN_ < (VCC - 3.75V),
AV = +2V/V, RL = 150Ω
1.92
1.996
2.08
(VEE + 3.75V) < VIN_ < (VCC - 3.75V)
AV = +2V/V, RL = 10kΩ
1.94
2.008
2.06
(VEE + 1V) < VIN_ < (VCC - 1.2V),
AV = +1V/V, RL = 10kΩ
0.95
0.994
1
RL = 10kΩ
0.5
1.5
RL = 150Ω
0.5
2
TCAV
10
V/V
%
ppm/°C
RL = 10kΩ
VEE + 1
VCC - 1.2
RL = 150Ω
VEE + 2.5
VCC - 2.5
RL = 10kΩ
VEE + 3
VCC - 3.1
RL = 150Ω
VEE +
3.75
VCC 3.75
AV = +1V/V
Input Voltage Range
VIN_
V
AV = +2V/V
2
_______________________________________________________________________________________
32 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
(VCC = +5V, VEE = -5V, VDD = +5V, AGND = DGND = 0, VIN_= 0, VOSDFILL_ = 0, RL = 150Ω to AGND, and TA = TMIN to TMAX,
unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
Output
Voltage Range
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
RL = 10kΩ
VEE + 1
VCC - 1.2
V
RL = 150Ω
VEE + 2.5
VCC - 2.5
V
11
µA
VOUT
Input Bias Current
IB
Input Resistance
RIN_
Output Offset Voltage
VOFFSET
Output Short-Circuit Current
ISC
Enabled Output Impedance
ZOUT
Output Leakage Current,
Disable Mode
DC Power-Supply Rejection
Ratio
IOD
PSRR
ICC
Quiescent
Supply Current
IEE
4
(VEE + 1V) < VIN_ < (VCC - 1.2V)
10
AV = +1V/V
±5
±20
AV = +2V/V
±10
±40
Sinking or sourcing, RL = 1Ω
±40
mA
(VEE + 1V) < VIN_ < (VCC - 1.2V)
0.2
Ω
(VEE + 1V) < VOUT_ < (VCC - 1.2V)
4.5V < (VCC - VEE) < 10.5V
RL = ∞
RL = ∞
Outputs enabled,
TA = +25°C
60
1
70
110
Outputs enabled
mV
µA
dB
160
185
Outputs disabled
60
80
Outputs enabled,
TA = +25°C
105
160
Outputs enabled
Outputs disabled
IDD
0.004
MΩ
mA
185
55
80
4
8
_______________________________________________________________________________________
3
MAX4358
DC ELECTRICAL CHARACTERISTICS—DUAL SUPPLIES ±5V (continued)
MAX4358
32 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
DC ELECTRICAL CHARACTERISTICS—DUAL SUPPLIES ±3V
(VCC = +3V, VEE = -3V, VDD = +3V, AGND = DGND = 0, VIN_ = 0, VOSDFILL_ = 0, RL = 150Ω to AGND, and TA = TMIN to TMAX,
unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
Operating Supply Voltage
Range
Logic Supply Voltage Range
Gain (Note 1)
SYMBOL
VCC - VEE
Guaranteed by PSRR test
VDD to
DGND
MIN
TYP
MAX
UNITS
4.5
10.5
V
2.7
5.5
V
(VEE + 1V) < VIN_ < (VCC - 1.2V),
AV = +1V/V, RL = 150Ω
0.94
0.983
1
(VEE + 1V) < VIN_ < (VCC - 1.2V),
AV = +1V/V, RL = 10kΩ
0.96
0.993
1
AV
Gain Matching
(Channel to Channel)
Temperature Coefficient of
Gain
CONDITIONS
V/V
(VEE + 2V) < VIN_ < (VCC - 2.1V),
AV = +2V/V, RL = 150Ω
1.92
1.985
2.08
(VEE + 2V) < VIN_ < (VCC - 2.1V)
AV = +2V/V, RL = 10kΩ
1.94
2.00
2.06
RL = 10kΩ
0.5
1.5
RL = 150Ω
0.5
2
TCAV
10
Input Voltage Range
VEE + 1
VCC 1.2
RL = 150Ω
VEE + 1
VCC 1.2
RL = 10kΩ
VEE + 2
VCC 2.1
RL = 150Ω
VEE + 2
VCC 2.1
VEE + 1
VCC 1.2
VEE + 1
VCC 1.2
VIN_
V
AV = +2V/V
RL = 10kΩ
Output Voltage Range
VOUT
V
RL = 150Ω
Input Bias Current
Input Resistance
Output Offset
Voltage
4
ppm/°C
RL = 10kΩ
AV = +1V/V
IB
RIN
VOFFSET
%
4
11
(VEE + 1V) < VIN_ < (VCC - 1.2V)
10
AV = +1V/V
±5
±20
AV = +2V/V
±10
±40
_______________________________________________________________________________________
µA
MΩ
mV
32 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
(VCC = +3V, VEE = -3V, VDD = +3V, AGND = DGND = 0, VIN_ = 0, VOSDFILL_ = 0, RL = 150Ω to AGND, and TA = TMIN to TMAX,
unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
SYMBOL
Output Short-Circuit Current
ISC
Enabled Output Impedance
ZOUT
Output Leakage Current,
Disable Mode
DC Power-Supply Rejection
Ratio
IOD
PSRR
ICC
Quiescent
Supply
Current
IEE
CONDITIONS
MIN
Sinking or sourcing, RL = 1Ω
(VEE + 1V) < VIN_ < (VCC - 1.2V)
(VEE + 1V) < VOUT_ < (VCC - 1.2V)
4.5V < (VCC - VEE) < 10.5V
RL = ∞
RL = ∞
TYP
UNITS
±40
mA
0.2
Ω
0.004
60
MAX
1
75
Outputs enabled
95
Outputs disabled
50
Outputs enabled
90
Outputs disabled
45
µA
dB
mA
3
IDD
DC ELECTRICAL CHARACTERISTICS—SINGLE SUPPLY +5V
(VCC = +5V, VEE = 0, VDD = +5V, AGND = DGND = 0, VIN_ = VOSDFILL_ = +1.75V, AV = +1V/V, RL = 150Ω to AGND, and TA = TMIN
to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
Operating Supply Voltage
Range
Logic-Supply Voltage Range
SYMBOL
VCC
CONDITIONS
Guaranteed by PSRR test
VDD to
DGND
(VEE + 1V) < VIN < (VCC - 2.5V),
AV = +1V/V, RL = 150Ω
Gain (Note 1)
AV
Gain Matching (Channel to
Channel)
Temperature Coefficient of Gain
Input Voltage Range
Output Voltage
Range
MIN
MAX
UNITS
4.5
5.5
V
2.7
5.5
V
0.94
VOUT
0.995
1
V
(VEE + 1V) < VIN < (VCC - 1.2V),
AV = +1V/V, RL = 10kΩ
0.94
0.995
1
RL = 10kΩ
0.5
3
RL = 150Ω
0.5
3
TCAV
VIN
TYP
ppm/°
C
10
RL = 10kΩ
VEE +
1
VCC 1.2
RL = 150Ω
VEE +
1
VCC 2.5
AV = +1V/V,
RL = 10kΩ
VEE +
1
VCC 1.2
AV = +1V/V,
RL = 150Ω
VEE +
1
VCC 2.5
AV = +1V/V
%
V
V
_______________________________________________________________________________________
5
MAX4358
DC ELECTRICAL CHARACTERISTICS—DUAL SUPPLIES ±3V (continued)
MAX4358
32 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
DC ELECTRICAL CHARACTERISTICS—SINGLE SUPPLY +5V (continued)
(VCC = +5V, VEE = 0, VDD = +5V, AGND = DGND = 0, VIN_ = VOSDFILL_ = +1.75V, AV = +1V/V, RL = 150Ω to AGND, and TA = TMIN
to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
Input Bias Current
Input Resistance
Output Offset
Voltage
Output Short-Circuit Current
Enabled Output Impedance
Output Leakage Current,
Disable Mode
DC Power-Supply Rejection
Ratio
Quiescent Supply
Current
SYMBOL
MIN
IB
RIN
VOFFSET
ISC
ZOUT
IOD
PSRR
VEE + 1V < VIN – < VCC - 1.2V
TYP
MAX
4
11
10
UNITS
µA
MΩ
AV = +1V/V
±10
Sinking or sourcing, RL = 1Ω
±35
mA
(VEE + 1V) < VIN– < (VCC - 1.2V)
0.2
Ω
(VEE + 1V) < VOUT– _< (VCC - 1.2V)
4.5V < VCC - VEE < 5.5V
ICC
RL = ∞
IEE
RL = ∞
IDD
6
CONDITIONS
0.004
50
65
Outputs enabled, TA = +25°C
85
Outputs disabled
35
Outputs enabled, TA = +25°C
80
Outputs disabled
30
4
_______________________________________________________________________________________
±40
1
mV
µA
dB
mA
32 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
(VCC - VEE) = +4.5V to +10.5V, VDD = +2.7V to +5.5V, AGND = DGND = 0, VIN_ = VOSDFILL_ = 0, RL = 150Ω to AGND, and
TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
VDD = +5.0V
3
VDD = +3V
2
Input Voltage High Level
VIH
Input Voltage
Low Level
VIL
Input Current
High Level
IIH
VI > 2V
Input Current
Low Level
IIL
VI < 1V
Output Voltage High
Level
VOH
Output Voltage Low
Level
VOL
Output Current High
Level
IOH
Output Current
Low Level
IOL
MIN
TYP
MAX
V
VDD = +5.0V
0.8
VDD = +3V
0.6
Excluding RESET
-1
0.01
RESET
-30
-20
Excluding RESET
-1
0.01
-300
-235
ISOURCE = 1mA, VDD = +5V
4.7
4.9
ISOURCE = 1mA, VDD = +3V
2.7
2.9
RESET
UNITS
1
1
0.1
0.3
ISINK = 1mA, VDD = +3V
0.1
0.3
1
4
VDD = +3V, VOUT = +2.7V
1
8
VDD = +5V, VO = +0.1V
1
4
VDD = +3V, VO = +0.3V
1
8
µA
µA
V
ISINK = 1mA, VDD = +5V
VDD = +5V, VO = +4.9V
V
V
mA
mA
AC ELECTRICAL CHARACTERISTICS—DUAL SUPPLIES ±5V
(VCC = +5V, VEE = -5V, VDD = +5V, AGND = DGND = 0, VIN_ = VOSDFILL_ = 0, RL = 150Ω to AGND, and TA = +25°C, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
Small-Signal -3dB
Bandwidth
BWSS
VOUT_ = 20mVp-p
Medium-Signal -3dB
Bandwidth
BWMS
VOUT_ =
200mVp-p
Large-Signal -3dB
Bandwidth
BWLS
VOUT_ = 2Vp-p
Small-Signal 0.1dB
Bandwidth
BW0.1dB-SS
VOUT_ = 20mVp-p
Medium-Signal
0.1dB Bandwidth
BW0.1dB-MS
VOUT_ =
200mVp-p
Large-Signal 0.1dB
Bandwidth
BW0.1dB-LS
VOUT_ = 2Vp-p
Slew Rate
MIN
TYP
AV = +1V/V
95
AV = +2V/V
70
AV = +1V/V
90
AV = +2V/V
70
AV = +1V/V
40
AV = +2V/V
50
AV = +1V/V
15
AV = +2V/V
15
AV = +1V/V
15
AV = +2V/V
15
AV = +1V/V
12
AV = +2V/V
12
VOUT_ = 2V step,
AV = +1V/V
150
VOUT_ = 2V step,
AV = +2V/V
160
SR
MAX
UNITS
MHz
MHz
MHz
MHz
MHz
MHz
V/µs
_______________________________________________________________________________________
7
MAX4358
LOGIC-LEVEL CHARACTERISTICS
MAX4358
32 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
AC ELECTRICAL CHARACTERISTICS—DUAL SUPPLIES ±5V (continued)
(VCC = +5V, VEE = -5V, VDD = +5V, AGND = DGND = 0, VIN_ = VOSDFILL_ = 0, RL = 150Ω to AGND, and TA = +25°C, unless otherwise noted.)
PARAMETER
Settling Time
SYMBOL
tS 0.1%
CONDITIONS
VOUT_ = 0 to 2V
step
MIN
TYP
AV = +1V/V
60
AV = +2V/V
60
MAX
UNITS
ns
Switching Transient
(Glitch) (Note 3)
AV = +1V/V
50
AV = +2V/V
50
AC Power-Supply
Rejection Ratio
f = 100kHz
70
f = 1MHz
68
Differential Gain
Error (Note 4)
RL = 1kΩ
0.01
RL = 150Ω
0.05
Differential Phase
Error (Note 4)
RL = 1kΩ
0.03
RL = 150Ω
0.1
Crosstalk, All Hostile
f = 6MHz
-62
Off-Isolation, Input-to-Output
f = 6MHz
-110
dB
73
µVRMS
5
pF
3
pF
30
pF
Input Noise Voltage Density
en
Input Capacitance
CIN
Disabled Output
Capacitance
BW = 6MHz
Amplifier in disable mode
Capacitive Load at 3dB
Output Peaking
Output Impedance
ZOUT
f = 6MHz
Output enabled
3
Output disabled
4k
mV
dB
%
degrees
dB
Ω
AC ELECTRICAL CHARACTERISTICS—DUAL SUPPLIES ±3V
(VCC = +3V, VEE = -3V, VDD = +3V, AGND = DGND = 0, VIN_= VOSDFILL_ = 0, RL = 150Ω to AGND, AV = +1V/V, and TA = +25°C,
unless otherwise noted.)
PARAMETER
8
SYMBOL
CONDITIONS
AV = +1V/V
Small-Signal
-3dB Bandwidth
BWSS
VOUT_ =
20mVp-p
Medium-Signal
-3dB Bandwidth
BWMS
VOUT_ =
200mVp-p
Large-Signal -3dB
Bandwidth
BWLS
VOUT_ = 2Vp-p
Small-Signal
0.1dB Bandwidth
BW0.1dB-SS
Medium-Signal
0.1dB Bandwidth
Large-Signal 0.1dB
Bandwidth
MIN
TYP
90
AV = +2V/V
65
AV = +1V/V
90
AV = +2V/V
65
AV = +1V/V
30
AV = +2V/V
35
VOUT_ =
20mVp-p
AV = +1V/V
15
AV = +2V/V
15
BW0.1dB-MS
VOUT_ =
200mVp-p
AV = +1V/V
15
AV = +2V/V
15
BW0.1dB-LS
VOUT_ = 2Vp-p
AV = +1V/V
12
AV = +2V/V
12
_______________________________________________________________________________________
MAX
UNITS
MHz
MHz
MHz
MHz
MHz
MHz
32 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
(VCC = +3V, VEE = -3V, VDD = +3V, AGND = DGND = 0, VIN_= VOSDFILL_ = 0, RL = 150Ω to AGND, AV = +1V/V, and TA = +25°C,
unless otherwise noted.)
PARAMETER
Slew Rate
SYMBOL
SR
Settling Time
tS 0.1%
CONDITIONS
MIN
TYP
VOUT_ = 2V step
AV = +1V/V
120
VOUT_ = 2V step
AV = +2V/V
120
VO = 0 to 2V step
Switching Transient
(Glitch) (Note 3)
MAX
UNITS
V/µs
AV = +1V/V
60
AV = +2V/V
60
AV = +1V/V
15
AV = +2V/V
20
ns
mV
AC Power-Supply
Rejection Ratio
f = 100kHz
60
f = 1MHz
40
Differential Gain Error
(Note 4)
RL = 1kΩ
0.03
RL = 150Ω
0.2
Differential Phase
Error (Note 4)
RL = 1kΩ
0.08
RL = 150Ω
0.2
Crosstalk, All Hostile
f = 6MHz
-63
f = 6MHz
-112
dB
73
µVRMS
5
pF
3
pF
30
pF
Off-Isolation, Input to Output
Input Noise Voltage Density
Input Capacitance
en
BW = 6MHz
CIN_
Disabled Output Capacitance
Amplifier in disable mode
Capacitive Load at 3dB
Output Peaking
Output Impedance
ZOUT
f=
6MHz
Output enabled
3
Output disabled
4k
dB
%
degrees
dB
Ω
_______________________________________________________________________________________
9
MAX4358
AC ELECTRICAL CHARACTERISTICS—DUAL SUPPLIES ±3V (continued)
MAX4358
32 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
AC ELECTRICAL CHARACTERISTICS—SINGLE SUPPLY +5V
(VCC = +5V, VEE = 0, VDD = +5V, AGND = DGND = 0, VIN_ = VOSDFILL_ = 1.75V, RL = 150Ω to AGND, AV = +1V/V, and TA = +25°C,
unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Small-Signal
-3dB Bandwidth
BWSS
VOUT_ = 20mVp-p
90
MHz
Medium-Signal -3dB
Bandwidth
BWMS
VOUT = 200mVp-p
90
MHz
Large-Signal
-3dB Bandwidth
BWLS
VOUT = 1.5Vp-p
38
MHz
Small-Signal
0.1dB Bandwidth
BW0.1dB-SS
VOUT = 20mVp-p
12
MHz
Medium-Signal
0.1dB Bandwidth
BW0.1dB-MS
VOUT_ = 200mVp-p
12
MHz
Large-Signal
0.1dB Bandwidth
BW0.1dB-LS
VOUT_ = 1.5Vp-p
12
MHz
VOUT_ = 2V step, AV = +1V/V
100
V/µs
VOUT_ = 0 to 2V step
60
ns
25
mV
Slew Rate
Settling Time
SR
tS 0.1%
Switching Transient
(Glitch)
AC Power-Supply
Rejection Ratio
f = 100kHz
70
f = 1MHz
69
Differential Gain Error
(Note 4)
RL = 1kΩ
0.03
RL = 150Ω
0.15
Differential Phase
Error (Note 4)
RL = 1kΩ
0.06
RL = 150Ω
0.2
Crosstalk, All Hostile
f = 6MHz
-63
dB
Off-Isolation, Input-toOutput
f = 6MHz
-110
dB
73
µVRMS
5
pF
3
pF
30
pF
Input Noise Voltage
en
Input Capacitance
CIN_
Disabled Output
Capacitance
BW = 6MHz
Amplifier in disable mode
Capacitive Load at 3dB
Output Peaking
Output
Impedance
10
ZOUT
f = 6MHz
Output enabled
3
Output disabled
4k
______________________________________________________________________________________
dB
%
degrees
Ω
32 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
((VCC - VEE) = +4.5V to +10.5V, VDD = +2.7V to +5.5V, DGND = AGND = 0, VIN_ = VOSDFILL_ = 0 for dual supplies, VIN_ =
VOSDFILL_ = +1.75V for single supply, RL = 150Ω to AGND, CL = 100pF, AV = +1V/V, and TA = TMIN - TMAX, unless otherwise noted.
Typical values are at TA = +25°C. )
PARAMETER
Delay: UPDATE to Video Out
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
tPdUdVo
VIN = 0.5V step
200
450
ns
Delay: UPDATE to AOUT
tPdUdAo
MODE = 0, time to AOUT = low after
UPDATE = low
30
200
ns
Delay: OSDKEY_ to Output
tPdOkVo/
tPdOfVo
VOUT = 0.5V step
Delay: SCLK to DOUT Valid
tPdDo
Logic state change in DOUT on active
SCLK edge
30
200
ns
Delay: Output Disable
tPdHOeVo
VOUT = 0.5V, 1kΩ pulldown to AGND
300
800
ns
Delay: Output Enable
tPdLOeVo
Output disabled, 1kΩ pulldown to AGND,
VIN = 0.5V
200
800
ns
100
ns
VDD = +5V
40
VDD = +3V
60
ns
Setup: CE to SCLK
tSuCe
Setup: DIN to SCLK
tSuDi
100
ns
Hold Time: SCLK to DIN
tHdDi
100
ns
Minimum High Time: SCLK
tMnHCk
100
ns
Minimum Low Time: SCLK
tMnLCk
100
ns
Minimum Low Time: UPDATE
tMnLUd
100
ns
100
ns
Setup Time: UPDATE to SCLK
tSuHUd
Rising edge of UPDATE to falling edge of
SCLK
Hold Time: SCLK to UPDATE
tHdHUd
Falling edge of SCLK to falling edge of
UPDATE
100
ns
Setup Time: MODE to SCLK
tSuMd
Minimum time from clock edge to MODE
with valid data clocking
100
ns
Hold Time: MODE to SCLK
tHdMd
Minimum time from clock edge to MODE
with valid data clocking
100
ns
Minimum Low Time: RESET
tMnLRst
Delay: RESET
tPdRst
10kΩ pulldown to AGND
300
ns
600
ns
Note 1: Associated output voltage may be determined by multiplying the input voltage by the specified gain (AV) and adding output
offset voltage. Gain is specified for IN_ and OSDFILL_ signal paths.
Note 2: Logic level characteristics apply to the following pins: DIN, DOUT, SCLK, CE, UPDATE, RESET, A3–A0, MODE, AOUT, and
OSDKEY_.
Note 3: Switching transient settling time is guaranteed by the settling time (tS) specification. Switching transient is a result of updating the switch matrix.
Note 4: Input test signal: 3.58MHz sine wave of amplitude 40IRE superimposed on a linear ramp (0 to 100IRE). IRE is a unit of
video-signal amplitude developed by the International Radio Engineers: 140IRE = 1.0V.
Note 5: All devices are 100% production tested at +25°C. Specifications over temperature limits are guaranteed by design.
______________________________________________________________________________________
11
MAX4358
SWITCHING CHARACTERISTICS
MAX4358
32 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
Symbol Definitions
Naming Conventions:
TYPE
DESCRIPTION
• All parameters with time units are given “t” designation, with
appropriate subscript modifiers.
Ao
Signal
Address Valid Flag
(AOUT)
• Propagation delays for clocked signals are from active edge
of clock.
Ce
Signal
Clock Enable (CE)
Ck
Signal
Clock (SCLK)
• Propagation delay for level sensitive signals is from input to
output at 50% point of a transition.
Di
Signal
Serial Data In (DIN)
Do
Signal
Serial Data Output
(DOUT)
Md
Signal
MODE
Oe
Signal
Output enable
SYMBOL
12
Rst
Signal
Reset Input (RESET)
Ud
Signal
UPDATE
Vo
Signal
Video Out (OUT)
H
Property
High- or Low-to-High
transition
Hd
Property
Hold
L
Property
Low- or High-to-Low
transition
Mn
Property
Minimum
Mx
Property
Maximum
Pd
Property
Propagation delay
Su
Property
Setup
Tr
Property
Transition
W
Property
Width
• Setup and Hold times are measured from 50% point of signal transition to 50% point of clocking signal transition.
• Setup time refers to any signal that must be stable before
active clock edge, even if signal is not latched or clocked
itself.
• Hold time refers to any signal that must be stable during and
after active clock edge, even if signal is not latched or
clocked.
• Propagation delays to unobservable internal signals are
modified to setup and hold designations applied to observable IO signals.
______________________________________________________________________________________
32 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
TIMING PARAMETER DEFINITIONS
DATA AND CONTROL TIMING
NAME
tHdDi
tMnHCk
Ce: CE
tSuCe
tHdCe
tMnLCk
tMnLUd
tSuHUd
Ck: SCLK
tMnHCk
tSuDi
tHdDi
tMnLCk
Not Valid
Di: DIN
tHdHUd
Not Valid
Do: DOUT
tMnLUd
tPdDo
tHdUd
Ud: UPDATE
tPdDiDo
tMnMd
tSuUd
tWTrVo
tPdUdVo
Hi-Z
Vo: OUT_
Hi-Z
Ao: AOUT
tPdUdAo
Rst: RESET
tPdHOeVo
tPdRstVo
tMulRst
tPdLOeVo
Oe: OUTPUT ENABLE
OSD: KEY AND FILL TIMING
tMxTr
tMnLRst
tPdRstVo
Min High Time: Clk
Min Low Time: Clk
Min Low Time: Update
Setup Time: UPDATE to Clk with UPDATE High
Setup Time: UPDATE to Clk with UPDATE Low
Hold Time: Clk to UPDATE with UPDATE high
Hold Time: Clk to UPDATE with UPDATE Low
Asynchronous Delay: Data In to Data Out
Min Low Time: MODE
Max Rise Time: Clk, Update
Min Low Time: Reset
Delay: Reset to Video Output
TIMING PARAMETER DEFINITIONS
NAME
DESCRIPTION
tPdUdVo
Delay: Update to Video Out
tPdUdAo
Delay: UPDATE to Aout
Delay: OSD Key to Video Output
tPdOkVo
tPdOfVo
Delay: OSD Fill to Video Output
Delay: Clk to Data Out
tPdDo
tPdHOeVo
Delay: Output Enable to Video Output
tPdLOeVo
IN_
VIDEO SOURCE
(SELECTED INPUT)
DESCRIPTION
Hold Time: Clock to Data In
tSuCe
tSuDi
(High: Disable)
Delay: Output Enable to Video Output
(Low: Enable)
Setup: Clock Enable to Clock
Setup Time: Data In to Clock
Of: OSDFILLi
Ok: OSDKEYi
OUTi
VIDEO OUTPUT
(WITH SUPERIMPOSED OSD)
tPdHOkVo
tPdLOkVo
tPdLOfVo
Figure 1. Timing Diagram
______________________________________________________________________________________
13
MAX4358
Timing Diagram
Typical Operating Characteristics—Dual Supplies ±5V
(VCC = +5V and VEE = -5V, VDD = +5V, AGND = DGND = 0, VIN_ = 0, RL = 150Ω to AGND, AV = +1V/V, and TA = +25°C, unless
otherwise noted.)
-3
AV = +1V/V
-4
-1
AV = +2V/V
-2
-3
-4
-4
-6
-6
-7
-7
100
0.1
1000
1
-2
AV = +1V/V
-4
RL = 1kΩ
1
AV = +1V/V
0
-1
-2
AV = +2V/V
-3
-4
-1
-3
-4
-5
-6
-7
-7
-7
0.1
1
10
100
1000
0.1
1
10
100
1000
FREQUENCY (MHz)
FREQUENCY (MHz)
LARGE-SIGNAL GAIN FLATNESS vs.
FREQUENCY
LARGE-SIGNAL GAIN FLATNESS vs.
FREQUENCY
LARGE-SIGNAL FREQUENCY RESPONSE
(AV = +1V/V)
0.4
0.3
0.2
0.1
0.0
AV = +1V/V
0.1
0.0
-0.1
-0.2
3
AV = +2V/V
-0.3
-0.4
0
2
3
4
5
-0.6
6
-0.3
-0.7
1
10
FREQUENCY (MHz)
100
1000
CL = 15pF
1
-0.2
AV = +2V/V
CL = 45pF
1
-0.5
-0.1
CL = 30pF
2
NORMALIZED GAIN (dB)
AV = +1V/V
NORMALIZED GAIN (dB)
0.5
RL = 1kΩ
0.2
MAX4358 toc08
0.3
MAX4358 toc07
0.6
MAX4358 toc09
FREQUENCY (MHz)
0.7
0.1
AV = +2V/V
-2
-6
1000
AV = +1V/V
0
-6
100
1000
RL = 1kΩ
1
-5
10
100
2
-5
1
10
SMALL-SIGNAL FREQUENCY RESPONSE
3
NORMALIZED GAIN (dB)
-1
0.1
1
FREQUENCY (MHz)
2
NORMALIZED GAIN (dB)
AV = +2V/V
0
-3
0.1
1000
MEDIUM-SIGNAL FREQUENCY RESPONSE
3
MAX4358 toc04
RL = 1kΩ
2
1
100
FREQUENCY (MHz)
LARGE-SIGNAL FREQUENCY RESPONSE
3
10
MAX4358 toc05
10
AV = +2V/V
-3
-5
1
MAX4358 toc03
-2
-6
FREQUENCY (MHz)
NORMALIZED GAIN (dB)
-1
-5
0.1
AV = +1V/V
0
-5
-7
14
1
MAX4358 toc06
-2
0
RL = 150Ω
2
NORMALIZED GAIN (dB)
-1
AV = +1V/V
1
3
MAX4358 toc02
AV = +2V/V
0
RL = 150Ω
2
NORMALIZED GAIN (dB)
NORMALIZED GAIN (dB)
1
3
MAX4358 toc01
RL = 150Ω
2
SMALL-SIGNAL FREQUENCY RESPONSE
MEDIUM-SIGNAL FREQUENCY RESPONSE
LARGE-SIGNAL FREQUENCY RESPONSE
3
NORMALIZED GAIN (dB)
MAX4358
32 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
7
0.1
1
10
FREQUENCY (MHz)
100
1000
0.1
1
10
FREQUENCY (MHz)
______________________________________________________________________________________
100
1000
32 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
CL = 15pF
2
3
4
CL = 45pF
7
6
5
4
CL = 30pF
3
2
5
0
7
-1
10
100
1000
1
100
1000
CL = 15pF
0.1
1
-70
-80
AV = +2V/V
-50
-90
100
-55
-60
-65
-70
1000
AV = +1V/V
-10
-20
-30
-40
2ND HARMONIC
-50
-60
-75
-70
-80
-80
-85
-90
1000
100
DISTORTION vs. FREQUENCY
0
-90
-100
10
FREQUENCY (MHz)
DISTORTION (dBc)
-60
3ND HARMONIC
-100
0.1
1
10
100
1000
0.1
1
10
100
1000
FREQUENCY (MHz)
FREQUENCY (MHz)
FREQUENCY (MHz)
DISTORTION vs. FREQUENCY
ENABLED-OUTPUT IMPEDANCE
vs. FREQUENCY
DISABLED OUTPUT IMPEDANCE vs.
FREQUENCY
-30
2ND HARMONIC
-50
-60
3ND HARMONIC
-70
-80
100
10
1
MAX4358 toc18
100k
OUTPUT IMPEDANCE (Ω)
OUTPUT IMPEDANCE (Ω)
-20
1M
MAX4358 toc17
1000
MAX4358 toc16
AV = +2V/V
-10
DISTORTION (dBc)
10
-45
CROSSTALK (dB)
CROSSTALK (dB)
-50
-40
0
-1
CROSSTALK vs. FREQUENCY
-40
MAX4358 toc13
AV = +1V/V
0
CL = 30pF
1
-3
0.1
CROSSTALK vs. FREQUENCY
10
2
FREQUENCY (MHz)
-40
1
3
-2
FREQUENCY (MHz)
0.1
4
MAX4358 toc15
1
CL = 45pF
5
MAX4358 toc14
0.1
6
CL = 15pF
1
6
7
NORMALIZED GAIN (dB)
0
1
8
NORMALIZED GAIN (dB)
NORMALIZED GAIN (dB)
1
9
MEDIUM-SIGNAL FREQUENCY RESPONSE
(AV = +2V/V)
MAX4358 toc11
CL = 45pF
CL = 30pF
2
MAX4358 toc10
3
MEDIUM-SIGNAL FREQUENCY RESPONSE
(AV = +1V/V)
MAX4358 toc12
LARGE-SIGNAL FREQUENCY RESPONSE
(AV = +2V/V)
10k
1k
100
10
-90
-100
0.1
0.1
1
10
FREQUENCY (MHz)
100
1000
1
0.1
1
10
FREQUENCY (MHz)
100
1000
0.1
1
10
100
1000
FREQUENCY (MHz)
______________________________________________________________________________________
15
MAX4358
Typical Operating Characteristics—Dual Supplies ±5V (continued)
(VCC = +5V and VEE = -5V, VDD = +5V, AGND = DGND = 0, VIN_ = 0, RL = 150Ω to AGND, AV = +1V/V, and TA = +25°C, unless otherwise noted.)
Typical Operating Characteristics—Dual Supplies ±5V (continued)
(VCC = +5V and VEE = -5V, VDD = +5V, AGND = DGND = 0, VIN_ = 0, RL = 150Ω to AGND, AV = +1V/V, and TA = +25°C, unless
otherwise noted.)
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
PSRR (dB)
-80
-90
1000
VOLTAGE NOISE (nV√Hz)
-55
-60
-70
MAX4358 toc20
-50
INPUT VOLTAGE NOISE vs. FREQUENCY
-50
MAX4358 toc19
-40
-60
-65
-100
MAX4358 toc21
OFF ISOLATION vs. FREQUENCY
OFF ISOLATION (dB)
MAX4358
32 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
100
-70
-110
-120
100k
-75
1M
10M
100M
1G
10k
FREQUENCY (Hz)
100k
1M
10M
100M
10
10
FREQUENCY (Hz)
INPUT
500mV/div
INPUT
100mV/div
OUTPUT
1V/div
OUTPUT
1V/div
OUTPUT
100mV/div
20ns/div
MEDIUM-SIGNAL PULSE RESPONSE
(AV = +2V/V)
SWITCHING TIME
(AV = +1V/V)
MAX4358 toc25
INPUT
50mV/div
OUTPUT
100mV/div
20ns/div
16
100k
1M
10M
MAX4358 toc24
INPUT
1V/div
20ns/div
10k
MEDIUM-SIGNAL PULSE RESPONSE
(AV = +1V/V)
MAX4358 toc23
MAX4358 toc22
1k
FREQUENCY (Hz)
LARGE-SIGNAL PULSE RESPONSE
(AV = +2V/V)
LARGE-SIGNAL PULSE RESPONSE
(AV = +1V/V)
100
20ns/div
SWITCHING TIME
(AV = +2V/V)
MAX4358 toc26
VUPDATE
5V/div
VUPDATE
5V/div
VOUT
500mV/div
VOUT
1V/div
20ns/div
______________________________________________________________________________________
20ns/div
MAX4358 toc27
32 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
SWITCHING TRANSIENT (GLITCH)
(AV = +2V/V)
OFFSET VOLTAGE DISTRIBUTION
MAX4358 toc29
MAX4358 toc28
VUPDATE
5V/div
VUPDATE
5V/div
300
MAX4358 toc30
SWITCHING TRANSIENT (GLITCH)
(AV = +1V/V)
250
200
150
100
VOUT
25mV/div
VOUT
25mV/div
50
0
20ns/div
20ns/div
-14 -12 -10 -8 -6 -4 -2
0
2
4
6
OFFSET VOLTAGE (mV)
DIFFERENTIAL GAIN AND PHASE vs.
DC VOLTAGE (RL = 150Ω)
DIFFERENTIAL GAIN AND PHASE vs.
DC VOLTAGE (RL = 1kΩ)
LARGE-SIGNAL PULSE RESPONSE WITH
CAPACITIVE LOAD (CL = 30pF, AV = +1V/V)
0.015
0.010
0.005
0.000
-0.005
INPUT
1V/div
0 10 20 30 40 50 60 70 80 90 100
DIFF PHASE (°)
DIFF PHASE (°)
0 10 20 30 40 50 60 70 80 90 100
0.15
0.10
0.05
0.00
-0.05
MAX4358 toc32
DIFF GAIN (%)
MAX4358 toc31
DIFF GAIN (%)
MAX4358 toc33
0.08
0.06
0.04
0.02
0.00
-0.02
0.05
0.04
0.03
0.02
0.01
0.00
-0.01
OUTPUT
1V/div
0 10 20 30 40 50 60 70 80 90 100
0 10 20 30 40 50 60 70 80 90 100
IRE
IRE
LARGE-SIGNAL PULSE RESPONSE WITH
CAPACITIVE LOAD (CL = 30pF, AV = +2V/V)
MEDIUM-SIGNAL PULSE RESPONSE WITH
CAPACITIVE LOAD (CL = 30pF, AV = +1V/V)
MAX4358 toc34
20ns/div
MEDIUM-SIGNAL PULSE RESPONSE WITH
CAPACITIVE LOAD (CL = 30pF, AV = +2V/V)
MAX4358 toc36
MAX4358 toc35
INPUT
500mV/div
INPUT
100mV/div
INPUT
50mV/div
OUTPUT
1V/div
OUTPUT
100mV/div
OUTPUT
100mV/div
20ns/div
20ns/div
20ns/div
______________________________________________________________________________________
17
MAX4358
Typical Operating Characteristics—Dual Supplies ±5V (continued)
(VCC = +5V and VEE = -5V, VDD = +5V, AGND = DGND = 0, VIN_ = 0, RL = 150Ω to AGND, AV = +1V/V, and TA = +25°C, unless
otherwise noted.)
Typical Operating Characteristics—Dual Supplies ±5V (continued)
(VCC = +5V and VEE = -5V, VDD = +5V, AGND = DGND = 0, VIN_ = 0, RL = 150Ω to AGND, AV = +1V/V, and TA = +25°C, unless otherwise noted.)
0
100m
RESET DELAY (s)
AV = +2V/V
0.05
AV = +1V/V
-0.05
MAX4358 toc38
0.15
MAX4358 toc39
10
1
MAX4358 toc37
0.20
0.10
OSD SWITCHING TRANSIENT
(100IRE LEVEL SWITCH) (AV = +2V/V)
RESET DELAY vs. CRESET
GAIN vs. TEMPERATURE
VOSDKEY0
5V/div
10m
1m
100IRE
100µ
10µ
-0.10
1µ
-0.15
100n
VOUT0
500mV/div
0IRE
10n
-0.20
-50
-25
0
25
50
75
1p
100
10p 100p 1n
OSD SWITCHING 3.58MHz SIGNAL
(AV = +2V/V)
70
ICC
60
SUPPLY CURRENT (mA)
VOUT0
500mV/div
50ns/div
SUPPLY CURRENT vs. TEMPERATURE
MAX4358 toc40
VOSDKEY0
5V/div
10n 100n 1µ 10µ 100µ
CRESET (F)
TEMPERATURE (°C)
MAX4358 toc41
NORMALIZED GAIN (dB)
MAX4358
32 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
50
IEE
40
30
20
10
IDD
0
50ns/div
-50
-25
0
25
50
75
100
TEMPERATURE (°C)
18
______________________________________________________________________________________
32 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
MEDIUM-SIGNAL FREQUENCY RESPONSE
-3
-4
-0
-1
AV = +2V/V
-2
-3
-4
-4
-6
-7
-7
-7
0.1
1000
1
-0
-1
-2
AV = +1V/V
-4
AV = +2V/V
1
-0
AV = +1V/V
-1
-2
-3
-4
-0
-1
-2
-4
-5
-6
-7
-7
1
10
100
1
10
100
1000
FREQUENCY (MHz)
LARGE-SIGNAL GAIN FLATNESS VS.
FREQUENCY
LARGE-SIGNAL GAIN FLATNESS VS.
FREQUENCY
LARGE-SIGNAL FREQUENCY RESPONSE
(AV = +1V/V)
AV = +1V/V
0.5
0.4
0.3
0.2
AV = +2V/V
0.3
0.2
0.1
0.0
-0.1
AV = +2V/V
-0.2
0
10
FREQUENCY (MHz)
100
1000
CL = 45pF
CL = 30pF
1
0
CL = 15pF
-1
-2
-3
-4
-6
-0.4
1
2
-5
-0.3
-0.1
3
NORMALIZED GAIN (dB)
0.6
AV = +1V/V
0.4
NORMALIZED GAIN (dB)
0.7
RL = 1kΩ
0.5
MAX4358 toc49
MAX4358 toc48
0.6
MAX4358 toc50
FREQUENCY (MHz)
0.8
0.1
0.1
1000
FREQUENCY (MHz)
0.9
0.1
-7
0.1
1000
AV = +2V/V
-3
-6
100
1000
AV = +1V/V
1
-6
10
100
RL = 1kΩ
2
-5
1
10
SMALL-SIGNAL FREQUENCY RESPONSE
3
-5
0.1
1
FREQUENCY (MHz)
RL = 1kΩ
2
NORMALIZED GAIN (dB)
AV = +2V/V
-3
0.1
NORMALIZED GAIN (dB)
1
1000
MAX4358 toc46
RL = 1kΩ
2
100
MEDIUM-SIGNAL FREQUENCY RESPONSE
3
MAX4358 toc45
3
10
FREQUENCY (MHz)
LARGE-SIGNAL FREQUENCY RESPONSE
NORMALIZED GAIN (dB)
-3
-6
100
AV = +2V/V
-2
-5
10
AV = +1V/V
-1
-6
FREQUENCY (MHz)
NORMALIZED GAIN (dB)
1
-5
1
RL = 150Ω
-0
-5
0.1
MAX4358 toc44
AV = +1V/V
2
MAX4358 toc47
AV = +2V/V
-2
RL = 150Ω
1
NORMALIZED GAIN (dB)
-0
-1
2
SMALL-SIGNAL FREQUENCY RESPONSE
3
NORMALIZED GAIN (dB)
AV = +1V/V
1
NORMALIZED GAIN (dB)
MAX4358 toc42
RL = 150Ω
2
3
MAX4358 toc43
LARGE-SIGNAL FREQUENCY RESPONSE
3
-7
0.1
1
10
FREQUENCY (MHz)
100
1000
0.1
1
10
100
1000
FREQUENCY (MHz)
______________________________________________________________________________________
19
MAX4358
Typical Operating Characteristics—Dual Supplies ±3V
(VCC = +3V and VEE = -3V, VDD = +3V, AGND = DGND = 0, VIN_ = 0, RL = 150Ω to AGND, AV = +1V/V, and TA = +25°C, unless
otherwise noted.)
Typical Operating Characteristics—Dual Supplies ±3V (continued)
(VCC = +3V and VEE = -3V, VDD = +3V, AGND = DGND = 0, VIN_ = 0, RL = 150Ω to AGND, AV = +1V/V, and TA = +25°C, unless otherwise noted.)
CL = 15pF
-2
-3
-4
CL = 45pF
7
6
5
4
CL = 30pF
3
2
CL = 15pF
3
2
0
-1
0
-2
-7
1
-3
0.1
1000
CROSSTALK VS. FREQUENCY
1
AV = + 1V/V
-50
-60
-65
-70
100
1000
0.1
DISTORTION VS. FREQUENCY
-40
-45
-10
-50
-55
-60
-40
-50
-60
-70
-80
-85
-75
-90
-90
-80
-100
100k
1G
1M
-40
-50
-60
3RD HARMONIC
-70
-80
100
10
1
-100
0.1
1M
10M
FREQUENCY (Hz)
100M
10M
100M
1M
100k
10k
1k
100
10
-90
100k
1M
DISABLED OUTPUT IMPEDANCE
VS. FREQUENCY
OUTPUT IMPEDANCE (Ω)
OUTPUT IMPEDANCE (Ω)
2ND HARMONIC
-30
100k
MAX4358 toc58
-20
1G
FREQUENCY (Hz)
1000
MAX4358 toc57
AV = + 2V/V
100M
ENABLED OUTPUT IMPEDANCE
VS. FREQUENCY
DISTORTION VS. FREQUENCY
-10
10M
3RD HARMONIC
FREQUENCY (Hz)
FREQUENCY (Hz)
1000
2ND HARMONIC
-30
-80
100M
AV = + 1V/V
-20
-70
10M
100
CROSSTALK VS. FREQUENCY
-65
1M
10
FREQUENCY (MHz)
-75
100k
1
FREQUENCY (MHz)
AV = + 2V/V
-35
CROSSTALK (dB)
-55
10
DISTORTION (dB)
-45
-30
MAX4358 toc54
-40
CL = 15pF
MAX4358 toc59
100
MAX4358 toc55
10
CL = 30pF
1
1
FREQUENCY (MHz)
CROSSTALK (dB)
4
-6
1
CL = 45pF
5
-5
0.1
20
6
MAX4358 toc56
-0
-1
8
NORMALIZED GAIN (dB)
NORMALIZED GAIN (dB)
CL = 30pF
7
NORMALIZED GAIN (dB)
CL = 45pF
1
(AV = +2V/V)
9
MAX4358 toc52
2
MEDIUM-SIGNAL FREQUENCY RESPONSE
(AV = +1V/V)
MAX4358 toc51
3
MEDIUM-SIGNAL FREQUENCY RESPONSE
MAX4358 toc53
LARGE-SIGNAL FREQUENCY RESPONSE
(AV = +2V/V)
DISTORTION (dB)
MAX4358
32 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
1
0.1
1
10
FREQUENCY (MHz)
100
1000
0.1
1
10
FREQUENCY (MHz)
______________________________________________________________________________________
100
1000
32 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
POWER-SUPPLY
REJECTION RATIO vs. FREQUENCY
PSRR (dB)
-70
-80
-90
VOLTAGE NOISE (nV/√Hz)
-55
-60
INPUT VOLTAGE NOISE vs. FREQUENCY
1000
MAX4358 toc61
-50
OFF ISOLATION (dB)
-50
MAX4358 toc60
-40
-60
-65
-100
-70
MAX4358 toc62
OFF ISOLATION VS. FREQUENCY
100
-110
-120
10
-75
1M
10M
100M
1G
10k
100k
1M
10M
10
100M
100
1k
10k
100k
1M
10M
FREQUENCY(Hz)
LARGE-SIGNAL PULSE RESPONSE
(AV = +1V/V)
LARGE-SIGNAL PULSE RESPONSE
(AV = +2V/V)
MEDIUM-SIGNAL PULSE RESPONSE
(AV = +1V/V)
INPUT
1V/div
INPUT
500mV/div
SWITCHING TIME
(AV = +1V/V)
VUPDATE
3V/div
MAX4356 toc68
VUPDATE
3V/div
VOUT
1V/div
VOUT
500mV/div
20ns/div
SWITCHING TIME
(AV = +2V/V)
MAX4358 toc67
MAX4358 toc66
MEDIUM-SIGNAL PULSE RESPONSE
(AV = +2V/V)
OUTPUT
100mV/div
20ns/div
20ns/div
20ns/div
INPUT
50mV/div
INPUT
100mV/div
OUTPUT
100mV/div
OUTPUT
1V/div
OUTPUT
1V/div
MAX4358 toc65
FREQUENCY (Hz)
MAX4358 toc64
FREQUENCY (Hz)
MAX4358 toc63
100k
20ns/div
20ns/div
______________________________________________________________________________________
21
MAX4358
Typical Operating Characteristics—Dual Supplies ±3V (continued)
(VCC = +3V and VEE = -3V, VDD = +3V, AGND = DGND = 0, VIN_ = 0, RL = 150Ω to AGND, AV = +1V/V, and TA = +25°C, unless
otherwise noted.)
Typical Operating Characteristics—Dual Supplies ±3V (continued)
(VCC = +3V and VEE = -3V, VDD = +3V, AGND = DGND = 0, VIN_ = 0, RL = 150Ω to AGND, AV = +1V/V, and TA = +25°C, unless
otherwise noted.)
SWITCHING TRANSIENT GLITCH
(AV = +2V/V)
MAX4358 toc69
OFFSET VOLTAGE DISTRIBUTION
MAX4358 toc70
300
MAX4358 toc71
SWITCHING TRANSIENT GLITCH
(AV = +1V/V)
250
VUPDATE
3V/div
VUPDATE
3V/div
200
150
100
VOUT
25mV/div
VOUT
25mV/div
50
0
20ns/div
-15 -13 -11 -9 -7
20ns/div
-5 -3 -1
1
3
5
OFFSET VOLTAGE (mV)
MAX4358 toc74
MAX4358 toc73
DIFFERENTIAL
GAIN (%)
0.15
0.05
-0.05
INPUT
1V/div
DIFFERENTIAL
PHASE (°)
0.25
0.15
0.05
-0.05
LARGE-SIGNAL PULSE RESPONSE
WITH CAPACITIVE LOAD
(CL = 30pF, AV = +1V/V)
DIFFERENTIAL GAIN AND PHASE
(RL = 1kΩ)
MAX4358 toc72
DIFFERENTIAL
GAIN (%)
DIFFERENTIAL GAIN AND PHASE
(RL = 150Ω)
0.25
0.15
0.05
-0.05
DIFFERENTIAL
PHASE (°)
MAX4358
32 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
0.25
0.15
0.05
-0.05
10
10
20 30 40 50 60 70 80 90 100
20 30 40 50 60 70 80 90 100
IRE
IRE
OUTPUT
1V/div
20ns/div
LARGE-SIGNAL PULSE RESPONSE
WITH CAPACITIVE LOAD
(CL = 30pF, AV = +2V/V)
MEDIUM-SIGNAL PULSE RESPONSE
WITH CAPACITIVE LOAD
(CL = 30pF, AV = +1V/V)
MAX4358 toc75
MEDIUM-SIGNAL PULSE RESPONSE
WITH CAPACITIVE LOAD
(CL = 30pF, AV = +2V/V)
MAX4358 toc76
MAX4358 toc77
INPUT
500mV/div
INPUT
100mV/div
INPUT
50mV/div
OUTPUT
1V/div
OUTPUT
100mV/div
OUTPUT
100mV/div
20ns/div
22
20ns/div
______________________________________________________________________________________
20ns/div
32 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
100m
RESET DELAY (s)
AV = +2V/V
0.05
0
-0.05
MAX4356 toc79
0.15
NORMALIZED GAIN (dB)
10
1
MAX4356 toc78
0.20
0.10
OSD SWITCHING TRANSIENT
(100IRE LEVEL SWITCH)
RESET DELAY vs. CRESET
10m
AV = +1V/V
VOSDKEY0
3V/div
1m
100IRE
100µ
10µ
VOUT0
500mV/div
1µ
-0.10
AV = +2V/V
0IRE
100n
-0.15
MAX4358 toc80
GAIN VS. TEMPERATURE
10n
-0.20
-50
-25
0
25
50
75
100
TEMPERATURE (°C)
1p
10p 100p 1n
10n 100n 1µ 10µ 100µ
50ns/div
CRESET (F)
AV = +2V/V
VOSDKEY0
3V/div
MAX4358 toc81
OSD SWITCHING 3.58MHz SIGNAL
VOUT0
500mV/div
50ns/div
______________________________________________________________________________________
23
MAX4358
Typical Operating Characteristics—Dual Supplies ±3V (continued)
(VCC = +3V and VEE = -3V, VDD = +3V, AGND = DGND = 0, VIN_ = 0, RL = 150Ω to AGND, AV = +1V/V, and TA = +25°C, unless
otherwise noted.)
Typical Operating Characteristics—Single Supply +5V
(VCC = +5V and VEE = 0, VDD = +5V, AGND = DGND = 0, VIN_ = 0, RL = 150Ω to AGND, AV = +1V/V, and TA = +25°C, unless otherwise noted.)
-2
-3
-4
3
0
-1
-2
-3
-4
1
0
-1
-2
-3
-4
-5
-5
-5
-6
-6
-6
-7
-7
10
100
1
10
100
1000
0.1
100
FREQUENCY (MHz)
LARGE-SIGNAL FREQUENCY
RESPONSE
MEDIUM-SIGNAL FREQUENCY
RESPONSE
SMALL-SIGNAL FREQUENCY
RESPONSE
-2
-3
-4
3
1
0
-1
-2
-3
-4
1
0
-1
-2
-3
-4
-5
-5
-5
-6
-6
-6
-7
-7
1
10
100
1000
RL = 1kΩ
2
NORMALIZED GAIN (dB)
-1
RL = 1kΩ
2
1000
MAX4358 toc87
3
NORMALIZED GAIN (dB)
0
-7
0.1
1
10
100
1000
0.1
1
10
100
1000
FREQUENCY (MHz)
FREQUENCY (MHz)
LARGE-SIGNAL GAIN FLATNESS
vs. FREQUENCY
LARGE-SIGNAL GAIN FLATNESS
vs. FREQUENCY
LARGE-SIGNAL FREQUENCY RESPONSE
(AV = +1V/V)
0.6
0.5
0.4
0.3
0.2
0.3
0.2
0.1
0
-0.1
0
-2
-3
-4
-5
0.0
-0.3
-6
-7
-0.4
10
FREQUENCY (MHz)
100
1000
CL = 15pF
-1
-0.2
1
CL = 45pF
1
0.1
-0.1
CL = 30pF
2
NORMALIZED GAIN (dB)
0.4
NORMALIZED GAIN (dB)
0.7
RL = 1kΩ
0.5
3
MAX4358 toc89
0.6
MAX4358 toc88
0.8
MAX4358 toc90
FREQUENCY (MHz)
0.9
0.1
10
FREQUENCY (MHz)
1
0.1
1
FREQUENCY (MHz)
RL = 1kΩ
2
-7
0.1
1000
MAX4358 toc86
3
1
MAX4358 toc85
0.1
RL = 150Ω
2
NORMALIZED GAIN (dB)
-1
NORMALIZED GAIN (dB)
1
NORMALIZED GAIN (dB)
NORMALIZED GAIN (dB)
0
RL = 150Ω
2
SMALL-SIGNAL FREQUENCY
RESPONSE
MAX4358 toc83
RL = 150Ω
1
24
3
MAX4358 toc82
3
2
MEDIUM-SIGNAL FREQUENCY
RESPONSE
MAX4358 toc84
LARGE-SIGNAL FREQUENCY
RESPONSE
NORMALIZED GAIN (dB)
MAX4358
32 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
0.1
1
10
FREQUENCY (MHz)
100
1000
0.1
1
10
FREQUENCY (MHz)
______________________________________________________________________________________
100
1000
32 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
5
CL = 30pF
4
3
2
-65
-70
-75
-80
CL = 15pF
1
-20
-40
-60
-85
-70
-90
-80
-95
-90
-100
10
100
100k
1000
1M
10M
100M
1G
FREQUENCY (MHz)
FREQUENCY (Hz)
ENABLED OUTPUT IMPEDANCE
vs. FREQUENCY
DISABLED OUTPUT IMPEDANCE
vs. FREQUENCY
MAX4358 toc95
1k
100
0.1
100
-50
-60
-70
-80
-90
-110
-120
1
10
100M
-100
10
1
10M
OFF ISOLATION vs. FREQUENCY
10k
1
1000
0.1
1
10
100
100k
1000
1M
10M
100M
1G
FREQUENCY (MHz)
FREQUENCY (MHz)
FREQUENCY (Hz)
POWER-SUPPLY
REJECTION RATIO vs. FREQUENCY
INPUT VOLTAGE NOISE
vs. FREQUENCY
LARGE-SIGNAL PULSE RESPONSE
MAX4358 toc97
-50
VOLTAGE NOISE (NV/√Hz)
-55
1000
-60
-65
MAX4358 toc99
MAX4358 toc98
0.1
1M
-40
OFF ISOLATION (dB)
100k
OUTPUT IMPEDANCE (Ω)
10
100k
FREQUENCY (Hz)
1M
MAX4358 toc94
100
3rd HARMONIC
-50
-100
1
2nd HARMONIC
-30
0
1000
PSRR (dB)
-10
-1
0.1
OUTPUT IMPEDANCE (Ω)
-60
MAX4358 toc96
6
-55
CROSSTALK (dB)
NORMALIZED GAIN (dB)
7
MAX4358 toc92
CL = 45pF
0
DISTORTION (dBc)
8
DISTORTION vs. FREQUENCY
CROSSTALK vs. FREQUENCY
-50
MAX4358 toc91
9
MAX4358 toc93
MEDIUM-SIGNAL FREQUENCY RESPONSE
(AV = +1V/V)
INPUT
1V/div
100
OUTPUT
1V/div
-70
10
-75
10k
100k
1M
FREQUENCY (Hz)
10M
100M
10
100
1k
10k
100k
1M
10M
20ns/div
FREQUENCY (Hz)
______________________________________________________________________________________
25
MAX4358
Typical Operating Characteristics—Single Supply +5V (continued)
(VCC = +5V and VEE = 0, VDD = +5V, AGND = DGND = 0, VIN_ = 0, RL = 150Ω to AGND, AV = +1V/V, and TA = +25°C, unless otherwise noted.)
Typical Operating Characteristics—Single Supply +5V (continued)
(VCC = +5V and VEE = 0, VDD = +5V, AGND = DGND = 0, VIN_ = 0, RL = 150Ω to AGND, AV = +1V/V, and TA = +25°C, unless otherwise noted.)
SWITCHING TIME
MEDIUM-SIGNAL PULSE RESPONSE
MAX4358 toc101
MAX4358 toc100
INPUT
100mV/div
VUPDATE
5V/div
OUTPUT
100mV/div
VOUT
500mV/div
20ns/div
20ns/div
SWITCHING TRANSIENT (GLITCH)
OFFSET VOLTAGE HISTOGRAM
MAX4358 toc102
250
VUPDATE
5V/div
MAX4358 toc103
MAX4358
32 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
200
150
100
VOUT
25mV/div
50
0
20ns/div
-20 -18 -16 -14 -12 -10 -8 -6 -4 -2
0
OFFSET VOLTAGE (mV)
DIFFERENTIAL GAIN AND PHASE
(RL = 150Ω)
DIFFERENTIAL GAIN AND PHASE
(RL = 1kΩ)
MAX4358 toc104
0.04
DIFFERENTIAL 0.03
0.02
GAIN (%) 0.01
0
-0.01
0.30
0.25
0.20
DIFFERENTIAL 0.15
PHASE (%) 0.10
0
-0.05
-0.10
0.10
0.08
0.06
DIFFERENTIAL 0.04
PHASE (%) 0.02
0
-0.02
10
20 30 40 50 60 70 80 90 100
IRE
26
MAX4358 toc105
0.25
0.20
DIFFERENTIAL 0.15
GAIN (%) 0.10
0.05
0
-0.05
10
20 30 40 50 60 70 80 90 100
IRE
______________________________________________________________________________________
32 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
LARGE-SIGNAL PULSE RESPONSE WITH
CAPACITIVE LOAD (CL = 30pF)
MEDIUM-SIGNAL PULSE RESPONSE WITH
CAPACITIVE LOAD (CL = 30pF)
MAX4358 toc106
MAX4358 toc107
INPUT
1V/div
INPUT
100mV/div
INPUT
1V/div
OUTPUT
100mV/div
20ns/div
20ns/div
GAIN vs. TEMPERATURE
RESET DELAY
vs. CRESET
10
1
RESET DELAY (s)
0.10
0.05
0
-0.05
MAX4358 toc109
0.15
NORMALIZED GAIN (dB)
100
MAX4358 toc108
0.20
100m
10m
1m
100µ
10µ
-0.10
1µ
-0.15
100n
10n
-0.20
-50
-25
0
25
50
75
1p
100
10p 100p 1n
10n 100n 1µ 10µ 100µ
CRESET (F)
TEMPERATURE (°C)
OSD SWITCHING TRANSIENT
(100IRE LEVEL SWITCH)
OSD SWITCHING 3.58MHz SIGNAL
MAX4358 toc110
MAX4358 toc111
VOSDKEY0
5V/div
VOSDKEY0
5V/div
100IRE
VOUT0
250mV/div
VOUT0
250mV/div
0IRE
50ns/div
50ns/div
______________________________________________________________________________________
27
MAX4358
Typical Operating Characteristics—Single Supply +5V (continued)
(VCC = +5V and VEE = 0, VDD = +5V, AGND = DGND = 0, VIN_ = 0, RL = 150Ω to AGND, AV = +1V/V, and TA = +25°C, unless otherwise noted.)
MAX4358
32 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
Pin Description
PIN
NAME
1, 3, 5, 7, 9, 11, 13, 15, 17, 19,
21, 23, 25, 27, 29, 31, 33, 35, 37,
39, 41, 43, 45, 127, 129, 131,
133, 135, 137, 139, 141, 143
IN0–IN31
2, 4, 6, 8, 10, 12, 14, 16, 18, 20,
22, 24, 26, 28, 30, 32, 34, 72, 73,
107, 108, 109, 126, 128, 130,
132, 134, 136, 138, 140, 142
AGND
36, 74, 78, 82, 86, 90, 94, 98,
102, 106
VCC
38, 40, 42, 44
A3–A0
46
DGND
Digital Ground
47
AOUT
Address Recognition Output. AOUT drives low after successful chip address
recognition.
48
MODE
Serial Interface Mode Select Input. Drive high for Complete Matrix Mode
(Mode 1), or drive low for Individual Output Address Mode (Mode 0).
49
DIN
50
SCLK
51
UPDATE
Update Input. Drive UPDATE low to transfer data from Mode Registers to the
switch matrix.
52
RESET
Asynchronous Reset Input/Output. Drive RESET low to initiate hardware reset.
All analog outputs are disabled. Additional power-on reset delay may be set
by connecting a small capacitor from RESET to DGND.
53
CE
54
DOUT
55–70
OSDKEY0–
OSDKEY15
71
VDD
75, 77, 79, 81, 83, 85, 87, 89, 91,
93, 95, 97, 99, 101, 103, 105
OUT0–
OUT15
76, 80, 84, 88, 92, 96, 100, 104,
144
VEE
110, 111, 112, 113, 114, 115,
116, 117, 118, 119, 120, 121,
122, 123, 124, 125
OSDFILL15
–OSDFILL0
28
FUNCTION
Buffered Analog Inputs
Analog Ground
Positive Analog Supply. Bypass each pin with a 0.1µF capacitor to AGND.
Connect a single 10µF capacitor from one VCC pin to AGND.
Address Programming Inputs. Connect to DGND or VDD to select the address
for individual output address mode. See Table 4.
Serial Data Input. Data is clocked-in on the falling edge of SCLK.
Serial Clock Input
Clock Enable Input. Drive low to enable the serial data interface.
Serial Data Output. In Complete Matrix Mode, data is clocked through the 112bit Matrix Control shift register. In Individual Output Address Mode, data at DIN
passes directly to DOUT.
Digital Control Input. Control for the fast 2:1 OSD Insertion multiplexer routing
signal to output buffers. A logic high routes programmed IN_ analog input
signal to output buffer. A logic low routes the dedicated OSDFILL_ input to
corresponding output buffer.
Digital Logic Supply. Bypass VDD with a 0.1µF capacitor to DGND.
Buffered Analog Outputs. Gain is individually programmable for AV = +1V/V or
AV = +2V/V via the serial interface. Outputs may be individually disabled (high
impedance). On power-up, or assertion of RESET, all outputs are disabled.
Negative Analog Supply. Bypass each pin with a 0.1µF capacitor to AGND.
Connect a single 10µF capacitor from one VEE pin to AGND.
Dedicated OSD Analog Signal Buffered Inputs. For each output buffer
amplifier. OSDFILLi input signal is routed to output buffer amplifier OUTi when
the corresponding OSDKEYi is low.
______________________________________________________________________________________
32 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
OSDFILL1
OSDFILL0
OSDFILL15
MAX4358
IN0
IN1
32 x 16
SWITCH MATRIX
AV *
2:1
OSD
MUX
IN2
AV *
IN31
AV *
RESET
POWER-ON
RESET
THERMAL
SHUTDOWN
DISABLE ALL OUTPUTS
512 16
OUT0
ENABLE/DISABLE
AV*
SERIAL
INTERFACE
OUT2
OUT15
16
VCC
VEE
AGND
VDD
DGND
DECODE LOGIC
DIN
SCLK
UPDATE
CE
OUT1
LATCHES
MATRIX REGISTER
112 BITS
DOUT
UPDATE REGISTER
16 BITS
AOUT
*AV = +1V/V OR +2V/V
A0-A3 MODE
Detailed Description
The MAX4358 is a highly integrated 32 ✕ 16 nonblocking video crosspoint switch matrix . All inputs and outputs are buffered, with all outputs able to drive
standard 75Ω reverse-terminated video loads.
A three-wire interface programs the switch matrix and
initializes with a single update signal. The unique serial
interface operates in one of two modes, Complete
Matrix Mode (Mode 1) or Individual Output Address
Mode (Mode 0).
The signal path of the MAX4358 is from the buffered
inputs (IN0–IN31), through the switching matrix,
buffered by the output amplifiers, and presented at the
outputs (OUT0–OUT15) (Functional Diagram). The
other functional blocks are the serial interface and control logic. Each of the functional blocks is described in
detail below.
OSDKEY0
OSDKEY15
OSDKEY1
Analog Outputs
The MAX4358 outputs are high-speed amplifiers capable of driving 150Ω (75Ω back-terminated) loads. The
gain, AV = +1V/V or +2V/V, is selectable via programming bit 5 of the serial control word. Amplifier compensation is automatically optimized to maximize the
bandwidth for each gain selection. Each output can be
individually enabled and disabled via bit 6 of the serial
control word. When disabled, the output is high impedance presenting typically 4kΩ load, and 3pF output
capacitance, allowing multiple outputs to be connected
together for building large arrays. On power-up (or
asynchronous RESET) all outputs are initialized in the
disabled state to avoid output conflicts in large array
configurations. The programming and operation of the
MAX4358 is output referred. Outputs are configured
individually to connect to any one of the 32 analog
inputs, programmed to the desired gain (AV = +1V/V or
+2V/V), and enabled or disabled in a high-impedance
state.
______________________________________________________________________________________
29
MAX4358
Functional Diagram
MAX4358
32 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
Table 1. Operation Truth Table
CE
1
0
0
0
UPDATE
X
SCLK
DIN
DOUT
MODE
X
X
X
X
↓
1
0
X
↓
1
Di
X
Di
Di-112
X
Di
1
1
0
AOUT
X
1
1
1
RESET
1
OPERATION/COMMENTS
No change in logic
1
Data at DIN is clocked on
negative edge of SCLK into 112bit Complete Matrix Mode
register. DOUT supplies original
data in 112 SCLK pulses later.
1
Data in serial 112-bit Complete
Matrix Mode register is
transferred into parallel latches
which control the switching
matrix.
1
Data at DIN is routed to
Individual Output Address Mode
shift register. DIN is also
connected directly to DOUT so
that all devices on the serial bus
may be addressed in parallel.
0
0
X
Di
Di
0
0
1
4-bit chip address A3–A0 is
compared to D14–D11. If equal,
remaining 11 bits in Individual
Output Address Mode Register
are decoded, allowing
reprogramming for a single
output. AOUT signals successful
individual matrix update.
X
X
X
X
X
X
X
0
Asynchronous reset. All outputs
are disabled. Other logic remains
unchanged.
Note: "X" = Don’t Care
Analog Inputs
Switch Matrix
The MAX4358 offers 32 analog input channels. Each
input is buffered before the crosspoint matrix switch,
allowing one input to cross-connect up to 16 outputs.
The input buffers are voltage feedback amplifiers with
high-input impedance and low input bias current. This
allows the use of very simple input clamp circuits.
The MAX4358 has 512 individual T-switches making a
32 ✕ 16 switch matrix. The switching matrix is 100%
nonblocking, which means that any input may be routed to any output. The switch matrix programming is
output-referred. Each output may be connected to any
one of the 32 analog inputs. Any one input can be routed to all 16 outputs with no signal degradation.
OSDFILL and OSDKEY Inputs
Intended for on-screen display insertion, the 16 OSDFILL inputs are buffered analog signal inputs that are
routed to a dedicated output buffer through a fast 2:1
MUX. The signal presented to the output buffer is
selected from the programmed analog input signal
(IN_) and the dedicated OSDFILL input signal.
30
Digital Interface
The digital interface consists of the following pins: DIN,
DOUT, SCLK, AOUT, UPDATE, CE, A3–A0, MODE, and
RESET. DIN is the serial-data input, DOUT is the serialdata output.
______________________________________________________________________________________
32 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
MAX4358
4
A0–A3
CHIP ADDRESS
SCLK
CE
MODE
4
16-BIT INDIVIDUAL OUTPUT
ADDRESS MODE REGISTER
SCLK
CE
MODE
MODE
S
A DATA
ROUTING
GATE
B
11
DIN
112-BIT COMPLETE MATRIX MODE REGISTER
112
11
OUTPUT ADDRESS DECODE
DOUT
MODE
7
MODE
112
1 AOUT
UPDATE
EN
7
112-BIT PARALLEL LATCH
112
SWITCH DECODE
512
SWITCH MATRIX
16
OUTPUT ENABLE
Figure 2. Serial Interface Block Diagram
SCLK is the serial-data clock which clocks data into the
data input registers (Figure 3). Data at DIN is loaded in
at each falling edge of SCLK. DOUT is the data shifted
out of the 112-bit Complete Matrix Mode register (Mode
= 1). DIN passes directly to DOUT when in Individual
Output Address Mode (Mode = 0).
The falling edge of UPDATE latches the data and programs the matrix. When using Individual Output
Address Mode, the address recognition output AOUT
drives low when control-word bits D14 to D11 match
the address programming inputs (A3–A0) and UPDATE
is low (Table 1). Table 1 is the operation truth table.
Programming the Matrix
The MAX4358 offers two programming modes:
Individual Output Address Mode and Complete Matrix
Mode. These two distinct programming modes are
selected by toggling a single MODE pin high or low.
Both modes operate with the same physical board layout. This flexibility allows initial programming of the IC
by daisy-chaining and sending one long data word
while still being able to immediately address and
update individual outputs in the matrix.
Individual Output Address Mode (MODE = 0)
Drive MODE to logic low to select Mode 0. Individual
outputs are programmed via the serial interface with a
single 16-bit control word. The control word consists of
a don’t care MSB, the chip address bits, output
address bits, an output enable/disable bit, an output
gain-set bit, and input address bits (Table 2 through
Table 6, and Figure 2).
______________________________________________________________________________________
31
MAX4358
32 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
Table 2. 16-Bit Serial Control Word Bit Assignments (Mode 0: Individual Output
Address Mode)
BIT
NAME
15 (MSB)
X
14
IC Address A3
13
IC Address A2
12
IC Address A1
FUNCTION
Don’t Care
MSB of selected chip address
11
IC Address A0
LSB of selected chip address
10
Output Address B3
MSB of output buffer address
9
Output Address B2
8
Output Address B1
7
Output Address B0
6
Output Enable
5
Gain Set
4
Input Address 4
3
Input Address 3
2
Input Address 2
1
Input Address 1
0 (LSB)
Input Address 0
LSB of output buffer address
Enable bit for output, 0 = disable, 1 = enable.
Gain Select for output buffer, 0 = gain of +1V/V, 1 = gain of +2V/V.
MSB of input channel select address
LSB of input channel select address
In Mode 0, data at DIN passes directly to DOUT
through the data routing gate (Figure 3). In this configuration, the 16-bit control word is simultaneously sent to
all chips in an array of up to 16 addresses.
Complete Matrix Mode (MODE = 1)
Drive MODE to logic high to select Mode 1. A single
112-bit control word, consisting of sixteen 7-bit control
words, programs all outputs. The 112-bit control word’s
first 7-bit control word (MSBs) programs output 15, and
the last 7-bit control word (LSBs) programs output 0
(Table 7 and Figures 4 and 5). Data clocked into the
112-bit complete matrix mode register is latched on the
falling edge of UPDATE, and the outputs are immediately updated.
Initialization String
Complete Matrix Mode (Mode = 1) is convenient for
programming the matrix at power-up. In a large matrix
consisting of many MAX4358s, all the devices can be
programmed by sending a single bit stream equal to n
x 112 bits where n is the number of MAX4358 devices
on the bus. The first 112-bit data word programs the
last in-line MAX4358 (see Matrix Programming under
the Applications Information section).
32
On-Screen-Display (OSD) Fast MUX
The MAX4358 features an asynchronous dedicated 2:1
Mux for each output buffer amplifier. Fast 40ns switching times enable pixel switching for on-screen-display
(OSD) information such as text or other picture-in-picture signals (Figure 1). OSDFILL_ inputs are buffered
analog inputs connected to each dedicated OSD Mux.
Drive the dedicated OSDKEY_ digital input to switch
between the programmed IN_ input from the crosspoint
switch matrix and the OSDFILL_. A logic low on
OSDKEYi routes the analog signal at OSDFILLi to the
OUTi output buffer. OSDKEY_ control does not affect
the crosspoint switch matrix programming or the output-buffer enable/disable or gain-set programming.
RESET
The MAX4358 features an asynchronous bidirectional
RESET with an internal 20kΩ pullup resistor to VDD.
When RESET is pulled low either by internal circuitry, or
driven externally, the analog output buffers are latched
into a high-impedance state. After RESET is released,
the output buffers remain disabled. The outputs may be
enabled by sending a new 112-bit data word or a 16-bit
individual output address word. A reset is initiated from
any of three sources. RESET can be driven low by
external circuitry to initiate a reset, or RESET can be
pulled low by internal circuitry during power-up (poweron-reset) or thermal shutdown.
______________________________________________________________________________________
32 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
MAX4358
16-BIT INDIVIDUAL OUTPUT ADDRESS MODE:
FIRST BIT IS A DON'T CARE BIT, LAST 15 BITS CLOCKED INTO DIN WHEN MODE = 0, CREATES ADDRESS WORD; IC ADDRESS A3–A0 IS COMPARED TO DIN14–DIN11
WHEN UPDATE IS LOW; IF EQUAL, ADDRESSED OUTPUT IS UPDATED
UPDATE
tSuMd
tHdMd
MODE
SCLK
IC ADDRESS = 2
OUTPUT ADDRESS = 9
INPUT ADDRESS 0 (LSB) = 0
INPUT ADDRESS 1 = 0
INPUT ADDRESS 2 = 0
INPUT ADDRESS 3 = 0
INPUT ADDRESS 4 (MSB) = 1
GAIN SET = +1V/V
OUTPUT ENABLE
OUTPUT ADDRESS B0
OUTPUT ADDRESS B1
OUTPUT ADDRESS B2
OUTPUT ADDRESS B3
IC ADDRESS A0
IC ADDRESS A1
IC ADDRESS A2
IC ADDRESS A3
DON'T CARE X
DIN
OUTPUT (i) ENABLED, AV = +1V/V,
CONNECTED TO INPUT 16
EXAMPLE OF 16-BIT SERIAL CONTROL WORD FOR OUTPUT CONTROL IN INDIVIDUAL OUTPUT ADDRESS MODE
Figure 3. Mode 0, Individual Output Address Mode Timing and Programming Example
Since driving RESET low only clears the output-bufferenable bit in the matrix control latches, RESET can be
used to disable all outputs simultaneously. If no new
data has been loaded into the 112-bit complete matrix
mode register, a single UPDATE restores the previous
matrix control settings.
Power-On-Reset
The power-on-reset ensures all output buffers are in a
disabled state when power is initially applied. A VDD
voltage comparator generates the power-on-reset.
When the voltage at VDD is less than 2.5V, the poweron-reset comparator pulls RESET low via internal circuitry. As the digital-supply voltage ramps up crossing
2.5V, the MAX4358 holds RESET low for 40ns (typ).
Connecting a small capacitor from RESET to DGND
extends the power-on-reset delay. (see the Power-On-
Reset vs. RESET Capacitance graph in Typical
Operating Characteristics).
Thermal Shutdown
The MAX4358 features thermal shutdown protection
with temperature hysteresis. When the die temperature
exceeds 150°C, the MAX4358 pulls RESET low, disabling the output buffer. When the die cools by 20°C,
the RESET pulldown is deasserted, and output buffers
remain disabled until the device is programmed again.
Applications Information
Building Large Video-Switching Systems
The MAX4358 can be easily used to create larger
switching matrices. The number of ICs required to
implement the matrix is a function of the number of
input channels, the number of outputs required, and
whether the array needs to be nonblocking or not.
______________________________________________________________________________________
33
MAX4358
32 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
tMnLCk
tMnHCk
SCLK
tSuDi
tHdDi
DIN
tSuHUd
tMnLUd
tPdDo
UPDATE
DOUT
SCLK
EXAMPLE OF 7-BIT
SERIAL CONTROL WORD
FOR OUTPUT CONTROL
NEXT CONTROL WORD
INPUT ADDRESS 0 (LSB) = 0
INPUT ADDRESS 1 = 0
INPUT ADDRESS 2 = 1
INPUT ADDRESS 3 = 1
INPUT ADDRESS 4 (MSB) = 1
ENABLE OUTPUT
OUTPUT (i) ENABLED, AV = +1V/V,
CONNECTED TO INPUT 28
GAIN SET = +1V/V
DIN
Figure 4. 7-Bit Control Word and Programming Example (Mode 1: Complete Matrix Mode)
UPDATE
1
0
MODE
DIN
1
7-BIT CONTROL WORD
OUT2
0
OUT1
OUT0
TIME
MOST SIGNIFICANT BITS OF THE 7-BIT CONTROL WORD ARE SHIFTED IN FIRST; I.E. OUT15, THEN OUT14, ETC.
LAST 7 BITS SHIFTED IN PRIOR TO UPDATE FALLING EDGE PROGRAM OUT0.
Figure 5. Mode 1: Complete Matrix Mode Programming
34
______________________________________________________________________________________
32 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
IC ADDRESS BIT
ADDRESS
A3 (MSB)
A2
A1
A0 (LSB)
Chip Address (Hex)
Chip Address (Decimal)
0
0
0
0
0h
0
0
0
0
1
1h
1
0
0
1
0
2h
2
0
0
1
1
3h
3
0
1
0
0
4h
4
0
1
0
1
5h
5
0
1
1
0
6h
6
0
1
1
1
7h
7
1
0
0
0
8h
8
1
0
0
1
9h
9
1
0
1
0
Ah
10
1
0
1
1
Bh
11
1
1
0
0
Ch
12
1
1
0
1
Dh
13
1
1
1
0
Eh
14
1
1
1
1
Fh
15
Table 4. Chip Address A3–A0 Pin Programming
PIN
ADDRESS
Chip Address (Hex)
Chip Address
(Decimal)
A3
A2
A1
A0
DGND
DGND
DGND
DGND
0h
0
DGND
DGND
DGND
VDD
1h
1
DGND
DGND
VDD
DGND
2h
2
DGND
DGND
VDD
VDD
3h
3
DGND
VDD
DGND
DGND
4h
4
DGND
VDD
DGND
VDD
5h
5
DGND
VDD
VDD
DGND
6h
6
DGND
VDD
VDD
VDD
7h
7
VDD
DGND
DGND
DGND
8h
8
VDD
DGND
DGND
VDD
9h
9
VDD
DGND
VDD
DGND
Ah
10
VDD
DGND
VDD
VDD
Bh
11
VDD
VDD
DGND
DGND
Ch
12
VDD
VDD
DGND
VDD
Dh
13
VDD
VDD
VDD
DGND
Eh
14
VDD
VDD
VDD
VDD
Fh
15
______________________________________________________________________________________
35
MAX4358
Table 3. Chip Address Programming for 16-Bit Control Word (Mode 0: Individual Output
Address Mode)
MAX4358
32 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
Table 5. Output Selection Programming
OUTPUT ADDRESS BIT
SELECTED OUTPUT
B3 (MSB)
B2
B1
B0 (LSB)
0
0
0
0
0
0
0
0
1
1
0
0
1
0
2
0
0
1
1
3
0
1
0
0
4
0
1
0
1
5
0
1
1
0
6
0
1
1
1
7
1
0
0
0
8
1
0
0
1
9
1
0
1
0
10
1
0
1
1
11
1
1
0
0
12
1
1
0
1
13
1
1
1
0
14
1
1
1
1
15
INPUTS
(0–31)
INPUTS
(32–63)
INPUTS
(64–95)
INPUTS
(96–127)
32
16
IN MAX4358 OUT
32
16
IN MAX4358 OUT
32
16
IN MAX4358 OUT
32
16
IN MAX4358 OUT
32
16
MAX4358
IN
OUT
32
16
MAX4358
IN
OUT
32
16
IN MAX4358 OUT
32
16
IN MAX4358 OUT
The most straightforward technique for implementing
nonblocking matrices is to arrange the building blocks
in a grid. The inputs connect to each vertical bank of
devices in parallel with the other banks. The outputs of
each building block in a vertical column connect
together in a wired-OR configuration. Figure 6.shows a
128-input, 32-output, nonblocking array using eight
MAX4358 crosspoint devices.
The wire-OR connection of the outputs shown in the
diagram is possible because the outputs of the IC
devices can be placed in a disabled, or high-impedance-output state. This disable state of the output
buffers is designed for a maximum impedance vs. frequency while maintaining a low output capacitance.
These characteristics minimize the adverse loading
effects from the disabled outputs. Larger arrays are
constructed by extending this connection technique to
more devices.
Driving a Capacitive Load
OUTPUTS (0–15)
OUTPUTS (16–31)
Figure 6. 128 x 32 Nonblocking Matrix Using 32 x 16
Crosspoint Devices
36
Figure 6 shows an implementation requiring many outputs to be wired together. This creates a situation
where each output buffer sees not only the normal load
impedance, but also the disabled impedance of all the
other outputs. This impedance has a resistive and a
capacitive component. The resistive components
reduce the total effective load for the driving output.
______________________________________________________________________________________
32 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
INPUTS (0–31)
INPUTS (32–63))
INPUTS (64–95)
INPUTS (96–127)
INPUT ADDRESS BIT
32
16
IN MAX4358 OUT
32
16
IN MAX4358 OUT
16
IN
16
IN
32
16
IN MAX4358 OUT
16
MAX4358 OUT
OUTPUTS (0–15)
32
16
IN MAX4358 OUT
Figure 7. 128 x 16 Nonblocking Matrix with Reduced Capacitive
Loading
OPTIMAL ISOLATION RESISTANCE
vs. CAPACITIVE LOAD
ISOLATION RESISTANCE (Ω)
30
25
20
15
10
5
0
0
100
200
300
400
500
CAPACITIVE LOAD (pF)
Figure 8. Optimal Isolation Resistor vs. Capacitive Load
Total capacitance is the sum of the capacitance of all
the disabled outputs and is a function of the size of the
matrix. Also, as the size of the matrix increases, the
length of the PC board traces increases, adding more
capacitance. The output buffers have been designed to
drive more than 30pF of capacitance while still maintaining a good AC response. Depending on the size of
the array, the capacitance seen by the output can
exceed this amount. There are several ways to improve
the situation. The first is to use more building-block
crosspoint devices to reduce the number of outputs
that need to be wired together (see Figure 7).
SELECTED
INPUT
B4
(MSB)
B3
B2
B1
B0
(LSB)
0
0
0
0
0
0
0
0
0
0
1
1
0
0
0
1
0
2
0
0
0
1
1
3
0
0
1
0
0
4
0
0
1
0
1
5
0
0
1
1
0
6
0
0
1
1
1
7
0
1
0
0
0
8
0
1
0
0
1
9
0
1
0
1
0
10
0
1
0
1
1
11
0
1
1
0
0
12
0
1
1
0
1
13
0
1
1
1
0
14
0
1
1
1
1
15
1
0
0
0
0
16
1
0
0
0
1
17
1
0
0
1
0
18
1
0
0
1
1
19
1
0
1
0
0
20
1
0
1
0
1
21
1
0
1
1
0
22
1
0
1
1
1
23
1
1
0
0
0
24
1
1
0
0
1
25
1
1
0
1
0
26
1
1
0
1
1
27
1
1
1
0
0
28
1
1
1
0
1
29
1
1
1
1
0
30
1
1
1
1
1
31
In Figure 7, the additional devices are placed in a second bank to multiplex the signals. This reduces the
number of wired-OR connections. Another solution is to
put a small resistor in series with the output before the
capacitive load to limit excessive ringing and oscillations. Figure 8 shows the graph of the Optimal Isolation
______________________________________________________________________________________
37
MAX4358
Table 6. Input Selection Programming
MAX4358
32 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
Table 7. 7-Bit Serial Control Word Bit Assignments (Mode 1: Complete Matrix Mode
Programming)
BIT
NAME
6 (MSB)
Output Enable
5
Gain Set
4
Input Address 4
3
Input Address 3
2
Input Address 2
1
Input Address 1
0 (LSB)
Input Address 0
FUNCTION
Enable bit for output, 0 = disable, 1 = enable.
Gain Select for output buffer, 0 = gain of +1V/V, 1 = gain of +2V/V.
MSB of input channel select address.
LSB of input channel select address
higher frequencies, offsetting the rolloff from the parasitic capacitance. Another solution is to add a smallvalue inductor to the output.
COMPUTER CONTROL
CAMERAS
IN0
SYNC0
IN1
OUT0
MONITOR
SYNC1
IN31
OUT1
MONITOR
SYNC0
OSDFILL0
MAX4358
OSD
SYNC15
OSDKEY0
SYNC1
SYNC15
OSDFILL1
OSD
OSD
OSDKEY1
OUT15
MONITOR
OSDFILL15
OSDKEY15
MEMORY
Figure 9. Improved Implementation of On-Screen Display
Resistor vs. Capacitive Load. A lowpass filter is created
from the series resistor and parasitic capacitance to
ground. A single R-C do not affect the performance at
video frequencies, but in a very large system there may
be many R-Cs cascaded in series. The cumulative
effect is a slight rolling off of the high frequencies causing a "softening" of the picture. There are two solutions
to achieve higher performance. One way is to design
the PC board traces associated with the outputs such
that they exhibit some inductance. By routing the traces
in a repeating "S" configuration, the traces that are
nearest each other will exhibit a mutual inductance
increasing the total inductance. This series inductance
causes the amplitude response to increase or peak at
38
On-Screen Display Insertion
The MAX4358 facilitates the insertion of on-screen
graphics and characters by using the built-in fast 2:1
multiplexer associated with each of the 16 outputs
(Functional Diagram). This mux switches in 40ns, much
less than the width of a single pixel. Access to this fast
mux is through 16 dedicated OSDFILL analog inputs
and 16 dedicated OSDKEY input controls. OSD timing
is externally controlled and applied to the OSDKEY
inputs (Figure 1). Pulling OSDKEYi low switches the
signal on the OSDFILLi input to the OUTi output. When
the OSDKEY signal is logic high, the signal at IN_ is
switched to the output. This switching action is repeated on a pixel-by-pixel basis for each scan line. In this
way any synchronized video signal, including arbitrary
graphics, can be inserted on the screen (Figure 9).
This technique for inserting OSD display information is
an improvement over the way it has traditionally been
done. Other OSD techniques require an external fast
mux and a buffer for each output.
Crosstalk and Board Routing Issues
Improper signal routing causes performance problems.
The MAX4358 has a typical crosstalk rejection of
-62dB at 6MHz. A bad PC board layout degrades the
crosstalk rejection by 20dB or more. To achieve the
best crosstalk performance:
1. Place ground isolation between long critical signal
PC board trace runs. These traces act as a shield to
potential interfering signals. Crosstalk can be
degraded from parallel traces as well as directly
above and below on adjoining PC board layers.
______________________________________________________________________________________
32 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
DIN
HOST
CONTROLLER
DOUT
MAX4358
A3
SCLK
CHIP ADDRESS = 1
DIN
CHIP ADDRESS = 2
DOUT
DIN
MAX4358
A3
SCLK
DOUT
MAX4358
A3
SCLK
CE
A2
A1
MODE
A1
A0
UPDATE
A0
CE
A2
CE
A2
MODE
A1
MODE
UPDATE
A0
UPDATE
MAX4358
CHIP ADDRESS = 0
VDD
NEXT DEVICE
VDD
VIRTUAL SERIAL BUS (MODE 0: INDIVIDUAL OUTPUT ADDRESS MODE)
Figure 10. Matrix Mode Programming
2.Maintain controlled-impedance traces. Design as
many of the PC board traces as possible to be 75Ω
transmission lines. This lowers the impedance of the
traces reducing a potential source of crosstalk. More
power will be dissipated due to the output buffer driving a lower impedance.
3.Minimize ground current interaction by using a good
ground plane strategy.
In addition to crosstalk, another key issue of concern is
isolation. Isolation is the rejection of undesirable feedthrough from input-to-output with the output disabled.
The MAX4358 achieves a -110dB isolation at 6MHz by
selecting the pinout configuration such that the inputs
and outputs are on opposite sides of the package.
Coupling through the power supply is a function of the
quality and location of the supply bypassing. Use
appropriate low-impedance components and locate
them as close as possible to the IC. Avoid routing the
inputs near the outputs.
Power-Supply Bypassing
The MAX4358 operates from a single +5V or dual ±3V
to ±5V supplies. For single-supply operation, connect
all VEE pins to ground and bypass all power-supply
pins with a 0.1µF capacitor to ground. For dual-supply
systems, bypass all supply pins to ground with 0.1µF
capacitors.
Power in Large Systems
The MAX4358 has been designed to operate with split
supplies down to ±3V or a single supply of +5V.
Operating at the minimum supply voltages reduces the
power dissipation by as much 40% to 50%. At ±5V, the
MAX4358 consumes 195mW (0.38mW/point).
Driving a PC-Board Interconnect or Cable
(AV = +1V/V or +2V/V)
The MAX4358 output buffers can be programmed to
either AV = +1V/V or +2V/V. The +1V/V configuration is
typically used when driving short lengths (less than
3cm), high impedance, "local" PC board traces. To
drive a cable or a 75Ω transmission line trace, program
the gain of the output buffer to +2V/V and place a 75Ω
resistor in series with the output. The series termination
resistor and the 75Ω load impedance act as a voltage
divider that divides the video signal in half. Set the gain
to +2V/V to transmit a standard 1V video signal down a
cable. The series 75Ω resistor is called the backmatch, reverse termination, or series termination. This
75Ω resistor reduces reflections and provides isolation,
increasing the output capacitive driving capability.
Matrix Programming
The MAX4358’s unique digital interface simplifies programming multiple MAX4358 devices in an array.
Multiple devices are connected with DOUT of the first
______________________________________________________________________________________
39
MAX4358
32 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
+5V
+5V
VCC
OUT0
1VP-P
Z0 = 75Ω
2VP-P
U2
IN0
OUT1
75Ω
IN1
MONITOR 0
220µF
75Ω
OUT15
500Ω
IN31
500Ω
MAX4358
AGND
U2 = MAX4450
OR 1/4 MAX4383
VEE
Figure 11. Typical Single +5V Supply Application
device connecting to DIN of the second device, and so
on (Figure 11). Two distinct programming modes,
Individual Output Address Mode (MODE = 0) and
Complete Matrix Mode (MODE = 1) are selected by
toggling a single MODE control pin high or low. Both
modes operate with the same physical board layout.
This allows initial programming of the IC by daisychaining and sending one long data word while still
being able to immediately address and update individual locations in the matrix.
Individual Output Address Mode
(Mode = 0)
In Individual Output Address Mode, the devices are
connected in a serial-bus configuration, with the data
routing gate (Figure 3) connecting DIN to DOUT, making each device a virtual node on the serial bus. A single 16-bit control word is sent to all devices
simultaneously. Only the device with the corresponding
chip address responds to the programming word and
updates its output. In this mode the chip address is set
via hardware pin strapping of A3–A0. The host communicates with the device by sending a 16-bit word consisting of 1 don’t care bit, 4-chip address bits, 11 bits of
data to make the word exactly two bytes in length. The
11 data bits are broken down into 4 bits to select the
output to be programmed, 1 bit to set the output
enable, 1 bit to set gain and 5 bits to the select the
40
input to be connected to that output. In this method, the
matrix is programmed one output at a time.
Complete Matrix Mode (Mode = 1)
In Complete Matrix Mode, the devices are connected in
a daisy-chain fashion where n 5 112 bits are sent to
program the entire matrix, where n = the number of
MAX4358 devices connected in series. The data word
is structured such that the first bit is the LSB of the last
device in the chain and the last data bit is the MSB of
the first device in the chain. The total length of the data
word is equal to the number of crosspoint devices to be
programmed in series times 112 bits per crosspoint
device. This programming method is most often used
at start-up to initially configure the switching matrix.
Operating at +5V Single-Supply with
AV = +1V/V or +2V/V
The MAX4358 guarantees operation with a single +5V
supply and a gain of +1V/V for standard video-input
signals (1Vp-p). To implement a complete video matrix
switching system capable of gain = +2V/V while operating with a +5V single supply, combine the MAX4358
crosspoint switch with Maxim’s low-cost, high-performance video amplifiers optimized for single +5V supply
operation (Figure 11). The MAX4450 single and
MAX4451 dual op amps are unity-gain-stable devices
that combine high-speed performance with Rail-to-
______________________________________________________________________________________
32 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
Chip Information
TRANSISTOR COUNT: 44,890
PROCESS: BiCMOS
Rail-to-Rail is a registered trademark of Nippon Motorola, Inc.
______________________________________________________________________________________
41
MAX4358
Rail® outputs. The common-mode input voltage range
extends beyond the negative power-supply rail (ground
in single-supply applications). The MAX4450 is available in the ultra-small 5-pin SC70 package, while the
MAX4451 is available in a space-saving 8-pin SOT23
package. The MAX4383 is a quad op amp available in
a 14-pin TSSOP package. The MAX4380/MAX4381/
MAX4382 and MAX4384 offer individual output-highimpedance disable making these amplifiers suitable for
wired-OR connections.
109 AGND
110 OSDFILL15
111 OSDFILL14
112 OSDFILL13
113 OSDFILL12
114 OSDFILL11
115 OSDFILL10
116 OSDFILL9
117 OSDFILL8
118 OSDFILL7
119 OSDFILL6
120 OSDFILL5
121 OSDFILL4
122 OSDFILL3
123 OSDFILL2
124 OSDFILL1
126 AGND
127 IN0
128 AGND
129 IN1
130 AGND
131 IN2
132 AGND
133 IN3
134 AGND
135 IN4
136 AGND
137 IN5
138 AGND
139 IN6
140 AGND
141 IN7
142 AGND
143 IN8
144 VEE
TOP VIEW
125 OSDFILL0
Pin Configuration
IN9
1
108 AGND
AGND
2
107 AGND
IN10
3
106 VCC
AGND
4
105 OUT0
IN11
5
104 VEE
AGND
6
103 OUT1
IN12
7
102 VCC
AGND
8
101 OUT2
IN13
9
100 VEE
AGND 10
99 OUT3
IN14 11
98 VCC
AGND 12
97 OUT4
96 VEE
IN15 13
AGND 14
95 OUT5
IN16 15
94 VCC
AGND 16
93 OUT6
92 VEE
IN17 17
AGND 18
91 OUT7
MAX4358
IN18 19
90 VCC
89 OUT8
AGND 20
88 VEE
IN19 21
AGND 22
87 OUT9
IN20 23
86 VCC
85 OUT10
AGND 24
84 VEE
IN21 25
83 OUT11
AGND 26
82 VCC
IN22 27
81 OUT12
AGND 28
80 VEE
IN23 29
79 OUT13
AGND 30
78 VCC
IN24 31
77 OUT14
AGND 32
76 VEE
IN25 33
75 OUT15
AGND 34
61
62
63
64
65
66
67
68
69
70
71
72
OSDKEY8
OSDKEY7
OSDKEY6
OSDKEY5
OSDKEY4
OSDKEY3
OSDKEY2
OSDKEY1
OSDKEY0
VDD
AGND
53
CE
OSDKEY9
52
RESET
60
51
UPDATE
OSDKEY10
50
SCLK
59
49
DIN
OSDKEY11
48
MODE
58
47
AOUT
OSDKEY12
46
DGND
57
45
IN31
OSDKEY13
44
A0
56
43
IN30
OSDKEY14
42
A1
55
41
IN29
OSDKEY15
40
A2
54
39
IN28
DOUT
38
73 AGND
37
74 VCC
VCC 36
A3
IN26 35
IN27
MAX4358
32 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
TQFP
42
______________________________________________________________________________________
32 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
TQFP20x20x1.0mm.EPS
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 43
© 2001 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.
MAX4358
Package Information