MAXIM MAX4356ECD

19-2113; Rev 0; 8/01
16 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
The MAX4356 is a 16 ✕ 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 via an SPI/QSPI™-compatible, threewire 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 MAX4356 is available in a 128-pin TQFP package
and specified over an extended -40°C to 85°C temperature range.
Applications
Features
♦ 16 ✕ 16 Nonblocking Matrix with Buffered Inputs
and Outputs
♦ Operates from ±3V, ±5V, or +5V Supplies
♦ Individually Programmable Output Buffer Gain
(AV = +1V/V or +2V/V)
♦ High-Impedance Output Disable for Wired-OR
Connections
♦ Fast-Switching (40ns) 2:1 OSD Insertion Mux
♦ 0.1dB Gain Flatness to 14MHz
♦ -62dB Crosstalk, -110dB Isolation at 6MHz
♦ 0.02%/0.12° Differential Gain/Differential Phase
Error
♦ Low 195mW Power Consumption (0.76mW per
Point)
Ordering Information
PART
TEMP. RANGE
PIN-PACKAGE
MAX4356ECD
-40°C to +85°C
128 TQFP
Pin Configuration appears at end of data sheet.
Functional Diagram
Security Systems
Video Routing
Video-on-Demand Systems
OSDFILL1
OSDFILL0
OSDFILL15
Typical Operating Circuit
MAX4356
IN0
IN1
IN0
IN1
OUT0
MONITOR
IN15
AV *
IN2
MONITOR
RESET
OSDFILL0
AV *
POWER-ON
RESET
THERMAL
SHUTDOWN
DISABLE ALL OUTPUTS
OSD GENERATOR
AV *
2:1
OSD
MUX
IN15
OUT1
MAX4356
16 x 16
SWITCH MATRIX
OUT0
ENABLE/DISABLE
CAMERAS
AV*
256 16
MONITOR
DIN
SCLK
UPDATE
CE
SERIAL
INTERFACE
OUT15
VCC
VEE
AGND
VDD
DGND
DECODE LOGIC
OUT15
OSDKEY1
OUT2
16
OSDKEY0
OSDFILL1
OUT1
LATCHES
MATRIX REGISTER
96 BITS
DOUT
UPDATE REGISTER
16 BITS
AOUT
OSDFILL15
OSDKEY15
A0-A3 MODE
*AV = +1V/V OR +2V/V
OSDKEY0
OSDKEY15
OSDKEY1
SPI and 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
MAX4356
General Description
MAX4356
16 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)
128-Pin TQFP (derate 25mW/°C above +70°C).................2W
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)
Gain Matching
(Channel to Channel)
2
SYMBOL
VCC VEE
CONDITIONS
Guaranteed by PSRR test
VDD to
DGND
AV
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
V/V
_______________________________________________________________________________________
%
16 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
SYMBOL
Temperature Coefficient of Gain
TCAV
CONDITIONS
RL = 150Ω
VEE +
2.5
VCC 2.5
RL = 10kΩ
VEE +
3
VCC 3.1
RL = 150Ω
VEE +
3.75
VCC 3.75
RL = 10kΩ
VEE +
1
VCC 1.2
V
RL = 150Ω
VEE +
2.5
VCC 2.5
V
VIN_
RIN_
Output Offset Voltage
VOFFSET
V
4
AV = +1V/V
±5
±20
AV = +2V/V
±10
±40
Sinking or sourcing, RL = 1Ω
±40
mA
Ω
Enabled Output Impedance
Output Leakage Current,
Disable Mode
DC Power-Supply Rejection
Ratio
ZOUT
(VEE + 1V) < VIN_ < (VCC - 1.2V)
0.2
IOD
(VEE + 1V) < VOUT_ < (VCC - 1.2V)
0.004
Quiescent
Supply Current
IEE
4.5V < (VCC - VEE) < 10.5V
RL = ∞
RL = ∞
Outputs enabled,
TA = +25°C
60
MΩ
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
µA
10
ISC
ICC
11
(VEE + 1V) < VIN_ < (VCC - 1.2V)
Output Short-Circuit Current
PSRR
ppm/°C
VCC 1.2
IB
Input Resistance
UNITS
VEE + 1
VOUT
Input Bias Current
MAX
RL = 10kΩ
AV = +2V/V
Output
Voltage Range
TYP
10
AV = +1V/V
Input Voltage Range
MIN
mA
185
55
80
4
8
_______________________________________________________________________________________
3
MAX4356
DC ELECTRICAL CHARACTERISTICS—DUAL SUPPLIES ±5V (continued)
MAX4356
16 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
Input Bias Current
Input Resistance
Output Offset
Voltage
4
MAX
UNITS
4.5
10.5
V
2.7
5.5
V
0.94
0.983
1
(VEE + 1V) < VIN_ < (VCC - 1.2V),
AV = +1V/V, RL = 10kΩ
0.96
0.993
1
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
2.000
2.06
RL = 10kΩ
0.5
1.5
RL = 150Ω
0.5
2
TCAV
10
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
RL = 10kΩ
VEE +
1
VCC 1.2
RL = 150Ω
VEE +
1
VCC 1.2
VIN_
V
VOUT
V
IB
RIN
VOFFSET
%
ppm/°C
RL = 10kΩ
AV = +2V/V
Output Voltage Range
TYP
(VEE + 1V) < VIN_ < (VCC - 1.2V),
AV = +1V/V, RL = 150Ω
AV = +1V/V
Input Voltage Range
MIN
AV
Gain Matching
(Channel to Channel)
Temperature Coefficient of
Gain
CONDITIONS
4
11
(VEE + 1V) < VIN_ < (VCC - 1.2V)
10
AV = +1V/V
±5
±20
AV = +2V/V
±10
±40
_______________________________________________________________________________________
µA
MΩ
mV
16 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
mA
Ω
1
75
Outputs enabled
95
Outputs disabled
50
Outputs enabled
90
Outputs disabled
45
IDD
UNITS
0.2
0.004
60
MAX
±40
µA
dB
mA
3
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
Gain (Note 1)
SYMBOL
VCC
Gain Matching (Channel to
Channel)
Input Voltage Range
Guaranteed by PSRR test
VDD to
DGND
AV
Temperature Coefficient of Gain
CONDITIONS
MIN
MAX
UNITS
4.5
5.5
V
2.7
5.5
V
(VEE + 1V) < VIN < (VCC - 2.5V),
AV = +1V/V, RL = 150Ω
0.94
0.995
1
(VEE + 1V) < VIN < (VCC - 1.2V),
AV = +1V/V, RL = 10kΩ
0.94
0.995
1
RL = 10kΩ
0.5
RL = 150Ω
0.5
3
3
V/V
TCAV
VIN
TYP
ppm/°
C
10
RL = 10kΩ
VEE
+1
VCC
- 1.2
RL = 150Ω
VEE
+1
VCC
- 2.5
AV = +1V/V
%
V
_______________________________________________________________________________________
5
MAX4356
DC ELECTRICAL CHARACTERISTICS—DUAL SUPPLIES ±3V (continued)
MAX4356
16 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
Output Voltage
Range
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
SYMBOL
VOFFSET
ISC
ZOUT
IOD
PSRR
IEE
TYP
MAX
VEE
+1
VCC
- 1.2
AV = +1V/V, RL = 150Ω
VEE
+1
VCC
- 2.5
IB
RIN
IDD
6
MIN
AV = +1V/V, RL = 10kΩ
VOUT
ICC
Quiescent Supply
Current
CONDITIONS
4
VEE + 1V < VIN – < VCC - 1.2V
AV = +1V/V
Sinking or sourcing, RL = 1Ω
±10
±35
(VEE + 1V) < VIN– < (VCC - 1.2V)
0.2
(VEE + 1V) < VOUT– < (VCC - 1.2V)
4.5V < (VCC - VEE) < 5.5V
RL = ∞
RL = ∞
11
10
0.004
50
65
Outputs enabled, TA = +25°C
85
Outputs disabled
35
Outputs enabled, TA = +25°C
80
Outputs disabled
30
4
_______________________________________________________________________________________
UNITS
V
µA
MΩ
±40
mV
mA
Ω
1
µA
dB
mA
16 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
3
VDD = +2.7V
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
VDD = +5.0V
TYP
MAX
V
VDD = +5.0V
0.8
VDD = +2.7V
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, VO = +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
110
AV = +2V/V
78
AV = +1V/V
80
AV = +2V/V
75
AV = +1V/V
40
AV = +2V/V
50
AV = +1V/V
14
AV = +2V/V
11
AV = +1V/V
14
AV = +2V/V
11
AV = +1V/V
14
AV = +2V/V
11
VOUT_ = 2V step,
AV = +1V/V
150
VOUT_= 2V step,
AV = +2V/V
150
SR
MAX
UNITS
MHz
MHz
MHz
MHz
MHz
MHz
V/µs
_______________________________________________________________________________________
7
MAX4356
LOGIC-LEVEL CHARACTERISTICS
MAX4356
16 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, AV = +1V/V, 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
45
AC Power-Supply
Rejection Ratio
f = 100kHz
70
f = 1MHz
68
Differential Gain
Error (Note 4)
RL = 1kΩ
0.002
RL = 150Ω
0.02
Differential Phase
Error (Note 4)
RL = 1kΩ
0.02
RL = 150Ω
0.12
Crosstalk, All Hostile
f = 6MHz
-62
dB
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
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
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
8
MIN
TYP
110
AV = +2V/V
70
AV = +1V/V
110
AV = +2V/V
70
AV = +1V/V
32
AV = +2V/V
38
VOUT_ =
20mVp-p
AV = +1V/V
12
AV = +2V/V
12
BW0.1dB-MS
VOUT_ =
200mVp-p
AV = +1V/V
12
AV = +2V/V
12
BW0.1dB-LS
VOUT_ = 2Vp-p
AV = +1V/V
12
AV = +2V/V
12
_______________________________________________________________________________________
MAX
UNITS
MHz
MHz
MHz
MHz
MHz
MHz
16 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
125
VOUT_ = 2V step
AV = +2V/V
125
VO = 0 to 2V step
MAX
UNITS
V/µs
AV = +1V/V
60
AV = +2V/V
60
ns
Switching Transient
(Glitch) (Note 3)
AV = +1V/V
20
AV = +2V/V
20
AC Power-Supply
Rejection Ratio
f = 100kHz
72
f = 1MHz
71
Differential Gain Error
(Note 4)
RL = 1kΩ
0.02
RL = 150Ω
0.15
Differential Phase
Error (Note 4)
RL = 1kΩ
0.05
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
mV
dB
%
degrees
dB
Ω
_______________________________________________________________________________________
9
MAX4356
AC ELECTRICAL CHARACTERISTICS—DUAL SUPPLIES ±3V (continued)
MAX4356
16 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
Small-Signal
-3dB Bandwidth
Medium-Signal -3dB
Bandwidth
Large-Signal
-3dB Bandwidth
Small-Signal
0.1dB Bandwidth
Medium-Signal
0.1dB Bandwidth
Large-Signal
0.1dB Bandwidth
Slew Rate
Settling Time
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
BWSS
VOUT_ = 20mVp-p
100
MHz
BWMS
VOUT_ = 200mVp-p
100
MHz
BWLS
VOUT_ = 1.5Vp-p
40
MHz
BW0.1dB-SS
VOUT_ = 20mVp-p
10
MHz
BW0.1dB-MS
VOUT_ = 200mVp-p
12
MHz
BW0.1dB-LS
VOUT_ = 1.5Vp-p
14
MHz
VOUT_ = 2V step, AV = +1V/V
100
V/µs
VOUT_ = 0 to 2V step
60
ns
25
mV
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
0.1
RL = 150Ω
0.2
Differential Phase
Error (Note 4)
RL = 1kΩ
0.05
RL = 150Ω
0.2
Crosstalk, All Hostile
f = 6MHz
-63
dB
f = 6MHz
-110
dB
73
µVRMS
5
pF
3
pF
30
pF
Off-Isolation, Input-toOutput
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
10
ZOUT
f = 6MHz
Output enabled
3
Output disabled
4k
______________________________________________________________________________________
dB
%
degrees
Ω
16 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 to TMAX, unless otherwise
noted. Typical values are at TA = +25°C. )
TYP
MAX
UNITS
Delay: UPDATE to Video Out
PARAMETER
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
tPdHOe
VOUT = 0.5V, 1kΩ pulldown to AGND
300
800
ns
Delay: Output Enable
tPdLOe
Output disabled, 1kΩ pulldown to AGND,
VIN = 0.5V
200
800
ns
100
ns
Setup: CE to SCLK
SYMBOL
CONDITIONS
MIN
VDD = +5V
40
VDD = +3V
60
tSuCe
ns
Setup: DIN to SCLK
tSuDi
100
ns
Hold Time: SCLK to DIN
tHdDi
100
ns
tMnHCk
100
ns
Minimum Low Time: SCLK
tMnLCk
100
ns
Minimum Low Time: UPDATE
tMnLUd
100
ns
Setup Time: UPDATE to SCLK
tSuHUd
Rising edge of UPDATE to falling edge of
SCLK
100
ns
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
Minimum High Time: SCLK
Delay: RESET
tPdRst
10kΩ pulldown to AGND, 0.5V step
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 TA = +25°C. Specifications over temperature limits are guaranteed by design.
______________________________________________________________________________________
11
MAX4356
SWITCHING CHARACTERISTICS
MAX4356
16 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
Naming Conventions
Symbol Definitions
SYMBOL
Ao
DESCRIPTION
Signal
Address Valid Flag
(AOUT)
Ce
Signal
Clock Enable (CE)
Ck
Signal
Clock (SCLK)
Di
Signal
Serial Data In (DIN)
Signal
Serial Data Output
(DOUT)
Do
12
TYPE
Md
Signal
MODE
Oe
Signal
Output enable
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
• All parameters with time units are given a "t" designation, with appropriate subscript modifiers.
• Propagation delays for clocked signals are from the
active edge of clock.
• Propagation delay for level-sensitive signals is from
input to output at the 50% point of a transition.
• Setup and hold times are measured from the 50%
point of signal transition to the 50% point of the
clocking signal transition.
• Setup time refers to any signal that must be stable
before the active clock edge, even if the 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 the signal is not latched or clocked.
• Propagation delays to unobservable internal signals
are modified to setup and hold designations
applied to observable I/O signals.
______________________________________________________________________________________
16 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
NAME
tHdDi
tMnHCk
tMnLCk
Ce: CE
tSuCe
tHdCe
Ck: SCLK
tMnHCk
tMnLUd
tSuHUd
tSuDi
tHdDi
tMnLCk
Not Valid
Di: DIN
tHdHUd
Not Valid
Do: DOUT
tMnLUd
tPdDo
tHdUd
Ud: UPDATE
tPdDiDo
tMnMd
tSuUd
tWTrVo
Vo: OUT_
tMxTr
tPdUdVo
Hi-Z
Hi-Z
Ao: AOUT
tPdUdAo
Rst: RESET
tPdHOeVo
tPdRstVo
tMnlRst
tPdLOeVo
MAX4356
TIMING PARAMETER DEFINITIONS
DATA AND CONTROL TIMING
Oe: OUTPUT ENABLE
OSD: KEY AND FILL TIMING
IN_
VIDEO SOURCE
(SELECTED INPUT)
tMnLRst
tPdRstVo
DESCRIPTION
Hold Time: Clock to Data In
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
tPdOkVo
Delay: OSD Key to Video Output
Delay: OSD Fill to Video Output
tPdOfVo
tPdDo
Delay: Clk to Data Out
tPdHOeVo
Delay: Output Enable to Video Output
(High: Disable)
tPdLOeVo
Delay: Output Enable to Video Output
(Low: Enable)
Setup: Clock Enable to Clock
tSuCe
tSuDi
Setup Time: Data In to Clock
Of: OSDFILLi
Ok: OSDKEYi
OUTi
VIDEO OUTPUT
(WITH SUPERIMPOSED OSD)
tPdHOkVo
tPdLOkVo
tPdLOfVo
Figure 1. Timing Diagram
______________________________________________________________________________________
13
Typical Operating Characteristics—Dual Supplies ±5V
(VCC = +5V and VEE = -5V, VDD = +5V, AGND = DGND = 0, VIN_ = 0, RL = 150Ω to AGND, and TA = +25°C, unless otherwise
noted.)
MEDIUM-SIGNAL FREQUENCY RESPONSE
0
AV = +2V/V
-2
AV = +1V/V
-3
-4
AV = +1V/V
0
-1
-2
AV = +2V/V
-3
-4
-6
-7
-7
100
-7
0.1
1000
1
0.1
2
-1
-2
AV = +2V/V
-4
RL = 1kΩ
1
AV = +2V/V
0
-1
-2
AV = +1V/V
-3
1
-4
-1
-2
-4
-6
-6
-7
-7
10
100
0.1
1000
10
100
1000
LARGE-SIGNAL GAIN FLATNESS
vs. FREQUENCY
LARGE-SIGNAL FREQUENCY RESPONSE
(AV = +1V/V)
AV = +2V/V
-0.4
0
AV = +1V/V
-0.1
-0.2
-0.3
AV = +2V/V
-0.4
0
-2
-4
-5
-0.6
-6
-0.7
FREQUENCY (MHz)
100
1000
CL = 15pF
-3
-0.6
10
CL = 30pF
-1
-0.5
1
CL = 45pF
1
-0.5
-0.7
RL = 150Ω
2
NORMALIZED GAIN (dB)
-0.1
RL = 1kΩ
0.1
NORMALIZED GAIN (dB)
AV = +1V/V
3
MAX4356 toc08
MAX4356 toc07
0.3
0.2
MAX4356 toc09
LARGE-SIGNAL GAIN FLATNESS
vs. FREQUENCY
0
0.1
1
FREQUENCY (MHz)
0.1
-0.3
1
FREQUENCY (MHz)
RL = 150Ω
-0.2
0.1
FREQUENCY (MHz)
0.3
0.2
1000
AV = +2V/V
-3
-6
100
AV = +1V/V
0
-5
10
1000
RL = 1kΩ
2
-5
1
100
SMALL-SIGNAL FREQUENCY RESPONSE
-5
-7
10
3
NORMALIZED GAIN (dB)
AV = +1V/V
0.1
1
FREQUENCY (MHz)
MAX4356 toc05
1
-3
1000
MEDIUM-SIGNAL FREQUENCY RESPONSE
NORMALIZED GAIN (dB)
RL = 1kΩ
0
100
3
MAX4356 toc04
2
10
FREQUENCY (MHz)
LARGE-SIGNAL FREQUENCY RESPONSE
MAX4356 toc03
-4
-5
10
AV = +2V/V
-3
-6
3
NORMALIZED GAIN (dB)
-2
-6
1
AV = +1V/V
0
-1
-5
FREQUENCY (MHz)
14
1
-5
0.1
RL = 150Ω
2
MAX4356 toc06
-1
1
NORMALIZED GAIN (dB)
NORMALIZED GAIN (dB)
1
RL = 150Ω
2
SMALL-SIGNAL FREQUENCY RESPONSE
3
MAX4356 toc02
MAX4356 toc01
RL = 150Ω
2
3
NORMALIZED GAIN (dB)
LARGE-SIGNAL FREQUENCY RESPONSE
3
NORMALIZED GAIN (dB)
MAX4356
16 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
16 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
CL = 30pF
-2
CL = 15pF
-3
-4
CL = 30pF
5
0
CL = 30pF
2
1
0
CL = 15pF
3
1
10
100
0.1
1000
1
10
100
0.1
1000
CROSSTALK vs. FREQUENCY
AV = +2V/V
-50
CROSSTALK (dB)
-60
-70
-80
-90
0
-10
-60
-70
-80
10
100
-30
2ND HARMONIC
-40
-50
-60
3RD HARMONIC
-70
-90
-100
0.1
1
10
100
0.1
1000
1
10
100
FREQUENCY (MHz)
FREQUENCY (MHz)
FREQUENCY (MHz)
DISTORTION vs. FREQUENCY
ENABLED-OUTPUT IMPEDANCE
vs. FREQUENCY
DISABLED-OUTPUT IMPEDANCE
vs. FREQUENCY
2ND HARMONIC
-40
-50
-60
3RD HARMONIC
-70
-80
100
10
1
MAX4356 toc18
1M
100k
OUTPUT IMPEDANCE (Ω)
-20
OUTPUT IMPEDANCE (Ω)
AV = +2V/V
MAX4356 toc17
1000
MAX4356 toc16
0
-30
1000
1000
-80
-100
1
AV = +1V/V
-20
-90
-100
100
DISTORTION vs. FREQUENCY
CROSSTALK vs. FREQUENCY
DISTORTION ( dBc)
AV = +1V/V
-50
10
FREQUENCY (MHz)
-40
MAX4356 toc13
-40
0.1
1
FREQUENCY (MHz)
FREQUENCY (MHz)
MAX4356 toc14
0.1
CROSSTALK (dB)
3
2
-10
-7
DISTORTION ( dBc)
4
1
-6
-10
CL = 45pF
5
CL = 15pF
-5
-5
MAX4356 toc12
10
6
MAX4356 toc15
0
-1
CL = 45pF
NORMALIZED GAIN (dB)
NORMALIZED GAIN (dB)
1
NORMALIZED GAIN (dB)
CL = 45pF
7
MAX4356 toc11
RL = 150Ω
2
15
MAX4356 toc10
3
MEDIUM-SIGNAL FREQUENCY RESPONSE
(AV = +2V/V)
MEDIUM-SIGNAL FREQUENCY RESPONSE
(AV = +1V/V)
LARGE-SIGNAL FREQUENCY RESPONSE
(AV = +2V/V)
10k
1k
100
10
-90
-0.1
-100
0.1
1
10
FREQUENCY (MHz)
100
1
0.1
1
10
FREQUENCY (MHz)
100
1000
100k
1M
10M
100M
1G
FREQUENCY (Hz)
______________________________________________________________________________________
15
MAX4356
Typical Operating Characteristics—Dual Supplies ±5V (continued)
(VCC = +5V and VEE = -5V, VDD = +5V, AGND = DGND = 0, VIN_ = 0, RL = 150Ω to AGND, 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, and TA = +25°C, unless otherwise
noted.)
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
PSRR (dB)
-80
-90
-60
-65
1000
MAX4356 toc21
-55
-60
-70
MAX4356 toc20
-50
INPUT VOLTAGE NOISE vs. FREQUENCY
-50
MAX4356 toc19
-40
VOLTAGE NOISE (nV/√ Hz)
OFF ISOLATION vs. FREQUENCY
OFF ISOLATION (dB)
MAX4356
16 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
100
-100
-70
-110
-120
1
-75
100k
1M
10M
100M
1G
10k
100k
1M
10M
10
100M
1k
10k
100k
1M
10M
FREQUENCY (Hz)
FREQUENCY (Hz)
LARGE-SIGNAL PULSE RESPONSE
(AV = +1V/V)
LARGE-SIGNAL PULSE RESPONSE
(AV = +2V/V)
MEDIUM-SIGNAL PULSE RESPONSE
(AV = +1V/V)
MAX4356 toc23
MAX4356 toc22
MAX4356 toc24
INPUT
1V/div
INPUT
0.5V/div
INPUT
100mV/div
OUTPUT
0.5V/div
OUTPUT
0.5V/div
OUTPUT
50mV/div
25ns/div
25ns/div
25ns/div
MEDIUM-SIGNAL PULSE RESPONSE
(AV = +2V/V)
SWITCHING TIME
(AV = +1V/V)
SWITCHING TIME
(AV = +2V/V)
MAX4356 toc25
MAX4356 toc26
INPUT
50mV/div
VUPDATE
5V/div
VUPDATE
5V/div
OUTPUT
50mV/div
VOUT
00mV/div
VOUT
1V/div
25ns/div
16
100
FREQUENCY (Hz)
20ns/div
______________________________________________________________________________________
20ns/div
MAX4356 toc27
16 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
SWITCHING TRANSIENT (GLITCH)
(AV = +2V/V)
OFFSET VOLTAGE DISTRIBUTION
MAX4356 toc29
MAX4356 toc28
300
250
VUPDATE
5V/div
VUPDATE
5V/div
MAX4356 toc30
SWITCHING TRANSIENT (GLITCH)
(AV = +1V/V)
200
150
100
VOUT
25mV/div
VOUT
25mV/div
50
0
20ns/div
20ns/div
-15 -13 -11 -9
-7 -5 -3 -1
1
3
5
OFFSET VOLTAGE (mV)
0.004
0.002
0.000
-0.002
-0.004
DIFF PHASE (°)
DIFF PHASE (°)
INPUT
1V/div
0 10 20 30 40 50 60 70 80 90 100
0 10 20 30 40 50 60 70 80 90 100
0.15
0.10
0.05
0.00
-0.05
MAX4356 toc33
MAX4356 toc32
DIFF GAIN (%)
0.08
006
0.04
0.02
0.00
-0.02
LARGE-SIGNAL PULSE RESPONSE WITH
CAPACITIVE LOAD (CL = 30pF, AV = +1V/V)
DIFFERENTIAL GAIN AND PHASE
(RL = 1kΩ)
MAX4356 toc31
DIFF GAIN (%)
DIFFERENTIAL GAIN AND PHASE
(RL = 150Ω)
0.03
0.02
0.01
0.00
-0.01
OUTPUT
0.5/Vdiv
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)
25ns/div
MEDIUM-SIGNAL PULSE RESPONSE WITH
CAPACITIVE LOAD (CL = 30pF, AV = +2V/V)
MAX4356 toc36
MAX4356 toc35
MAX4356 toc34
INPUT
0.5V/div
INPUT
100mV/div
INPUT
50mV/div
OUTPUT
0.5/Vdiv
OUTPUT
50mV/div
OUTPUT
50mV/div
25ns/div
25ns/div
25ns/div
______________________________________________________________________________________
17
MAX4356
Typical Operating Characteristics—Dual Supplies ±5V (continued)
(VCC = +5V and VEE = -5V, VDD = +5V, AGND = DGND = 0, VIN_ = 0, RL = 150Ω to AGND, 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, and TA = +25°C, unless otherwise
noted.)
GAIN vs. TEMPERATURE
RESET DELAY vs. CRESET
0.15
1
100m
RESET DELAY (s)
0.10
0.05
AV = +2V/V
0
-0.05
MAX4356 toc38
10
MAX4356 toc37
0.20
NORMALIZED GAIN (dB)
AV = +1V/V
10m
1m
100µ
10µ
-0.10
1µ
-0.15
100n
10n
-0.20
-50
-25
0
25
50
75
100
1p
TEMPERATURE (°C)
10p 100p 1n
10n 100n 1µ 10µ 100µ
CRESET (F)
OSD SWITCHING TRANSIENT
(100IRE LEVEL SWITCH) (AV = +2V/V)
OSD SWITCHING 3.58MHz SIGNAL
(AV = +2V/V)
MAX4356 toc39
MAX4356 toc40
VOSDKEY0
5V/div
VOSDKEY0
5V/div
100IRE
VOUT0
500mV/div
VOUT0
500mV/div
0IRE
50ns/div
50ns/div
SUPPLY CURRENT vs. TEMPERATURE
60
MAX4358 toc41
70
SUPPLY CURRENT (mA)
MAX4356
16 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
ICC
50
IEE
40
30
20
10
IDD
0
-50
18
-25
0
25
50
TEMPERATURE (°C)
75
100
______________________________________________________________________________________
16 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
0
-1
AV = +2V/V
-2
-3
AV = +1V/V
-4
-2
Av = +2V/V
-4
1
0
-2
-4
-5
-6
-7
-7
1000
-7
0.1
1
10
100
1000
0.1
MEDIUM-SIGNAL FREQUENCY
RESPONSE
SMALL-SIGNAL FREQUENCY
RESPONSE
-1
-2
AV = +1V/V
-3
1
-4
AV = +1V/V
0
-1
-2
AV = +2V/V
-3
-4
1
-2
-3
-5
-5
-6
-6
-7
-7
100
1000
-7
0.1
1
10
100
1000
0.1
1
10
100
1000
FREQUENCY (MHz)
FREQUENCY (MHz)
LARGE-SIGNAL GAIN FLATNESS
LARGE-SIGNAL GAIN FLATNESS
LARGE-SIGNAL FREQUENCY RESPONSE
(AV = +1V/V)
-0.2
-0.3
AV = +1V/V
-0.5
AV = +2V/V
-0.7
AV = +1V/V
AV = +2V/V
0
-0.1
-0.2
-0.3
-0.4
10
FREQUENCY (MHz)
100
1000
CL = 45pF
1
0
-1
CL = 30pF
-2
CL = 15pF
-3
-4
-0.5
-5
-0.6
-6
-7
-0.7
1
2
NORMALIZED GAIN (dB)
-0.1
-0.4
0.1
NORMALIZED GAIN (dB)
0
RL = 1kΩ
0.2
3
MAX4356 toc49
MAX4356 toc48
0.1
-0.6
0.3
MAX4356 toc50
FREQUENCY (MHz)
RL = 150Ω
0.1
AV = +2V/V
-4
-5
10
AV = +1V/V
0
-1
-6
1
RL = 1kΩ
2
NORMALIZED GAIN (dB)
AV = +2V/V
RL = 1kΩ
2
3
MAX4356 toc46
3
1000
MAX4356 toc47
LARGE-SIGNAL FREQUENCY
RESPONSE
0
0.2
100
FREQUENCY (MHz)
1
0.3
10
FREQUENCY (MHz)
RL = 1kΩ
0.1
1
FREQUENCY (MHz)
NORMALIZED GAIN (dB)
3
100
AV = +2V/V
-3
-6
10
AV = +1V/V
-1
-6
1
MAX4356 toc44
MAX4356 toc43
AV = +1V/V
-1
RL = 150Ω
2
-5
2
NORMALIZED GAIN (dB)
0
-3
3
-5
0.1
NORMALIZED GAIN (dB)
1
MAX4356 toc45
NORMALIZED GAIN (dB)
1
RL = 150Ω
2
NORMALIZED GAIN (dB)
RL = 150Ω
SMALL-SIGNAL FREQUENCY
RESPONSE
3
MAX4356 toc42
3
2
MEDIUM-SIGNAL FREQUENCY
RESPONSE
NORMALIZED GAIN (dB)
LARGE-SIGNAL FREQUENCY
RESPONSE
0.1
1
10
FREQUENCY (MHz)
100
1000
0.1
1
10
100
1000
FREQUENCY (MHz)
______________________________________________________________________________________
19
MAX4356
Typical Operating Characteristics—Dual Supplies ±3V
(VCC = +3V and VEE = -3V, VDD = +3V, AGND = DGND = 0, VIN_ = 0, RL = 150Ω to AGND, 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, and TA = +25°C, unless otherwise
noted.)
-2
CL = 15pF
-3
-4
-5
4
CL = 30pF
0
-2
CL = 15pF
-4
-7
1
10
100
1000
2
0
-1
-4
0.1
1
10
100
1000
0.1
-35
-65
-70
-45
-10
-50
-55
-60
-30
-60
-70
-80
-85
-75
-90
-90
-80
-100
10
100
1000
3RD HARMONIC
0.1
1
10
100
FREQUENCY (Hz)
FREQUENCY (MHz)
FREQUENCY (MHz)
DISTORTION VS. FREQUENCY
ENABLED OUTPUT IMPEDANCE
VS. FREQUENCY
DISABLED OUTPUT IMPEDANCE
VS. FREQUENCY
2ND HARMONIC
-40
-50
-60
-70
3RD HARMONIC
-80
100
10
1
MAX4356 toc59
1M
100k
OUTPUT IMPEDANCE (Ω)
-20
OUTPUT IMPEDANCE (Ω)
AV = +2 V/V
MAX4356 toc58
1000
MAX4356 toc57
0
-30
1
2ND HARMONIC
-50
-70
0.1
1000
-40
-80
1G
AV = + 1V/V
-20
-65
100M
100
DISTORTION VS. FREQUENCY
-75
-10
10
0
DISTORTION (dBc)
-60
AV = + 2V/V
-40
CROSSTALK (dB)
-55
10M
1
FREQUENCY (MHz)
CROSSTALK VS. FREQUENCY
-30
MAX4356 toc54
-50
1M
CL = 15pF
FREQUENCY (MHz)
AV = +1V/V
1k
CL = 30pF
1
-2
CROSSTALK VS. FREQUENCY
-45
3
-3
FREQUENCY (MHz)
-40
CL = 45pF
4
-8
0.1
MAX4356 toc53
5
-6
-6
CROSSTALK (dB)
MAX4356 toc52
CL = 45pF
2
6
NORMALIZED GAIN (dB)
CL = 30pF
MEDIUM-SIGNAL FREQUENCY RESPONSE
(AV = +2V/V)
MAX4356 toc55
NORMALIZED GAIN (dB)
0
-1
6
NORMALIZED GAIN (dB)
CL = 45pF
1
8
MAX4356 toc51
3
2
MEDIUM-SIGNAL FREQUENCY RESPONSE
(AV = +1V/V)
MAX4356 toc56
LARGE-SIGNAL FREQUENCY RESPONSE
(AV = +2V/V)
CROSSTALK (dBc)
MAX4356
16 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
10k
1k
100
10
-90
-100
1M
10M
FREQUENCY (Hz)
20
1
0.1
0.1
100M
0.1
1
10
FREQUENCY (MHz)
100
1000
0.1
1
10
FREQUENCY (MHz)
______________________________________________________________________________________
100
1000
16 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
-60
PSRR (dB)
-70
-80
VOLTAGE NOISE (nV/ Hz)
-55
-65
-90
-100
-70
MAX4356 toc62
-50
1000
MAX4356 toc61
-50
MAX4356 toc60
-40
OFF ISOLATION (dB)
INPUT VOLTAGE NOISE
vs. FREQUENCY
POWER-SUPPLY REJECTION RATIO
VS. FREQUENCY
OFF ISOLATION VS. FREQUENCY
100
-110
10
-75
-120
100k
1M
10M
100M
10k
1G
100k
1M
10M
10
100M
LARGE-SIGNAL PULSE RESPONSE
(AV = +1V/V)
1k
10k
100k
INPUT
1V/div
INPUT
0.5V/div
INPUT
100mV/div
OUTPUT
0.5V/div
OUTPUT
0.5V/div
OUTPUT
50mV/div
25ns/div
25ns/div
25ns/div
MEDIUM-SIGNAL PULSE RESPONSE
(AV = +2V/V)
SWITCHING TIME
(AV = +1V/V)
SWITCHING TIME
(AV = +2V/V)
MAX4356 toc67
INPUT
50mV/div
VUPDATE
3V/div
VUPDATE
3V/div
OUTPUT
50mV/div
VOUT
500mV/div
VOUT
1V/div
25ns/div
20ns/div
10M
MAX4356 toc65
MAX4356 toc64
MAX4356 toc66
1M
MEDIUM-SIGNAL PULSE RESPONSE
(AV = +1V/V)
LARGE-SIGNAL PULSE RESPONSE
(AV = +2V/V)
MAX4356 toc63
100
FREQUENCY (Hz)
FREQUENCY (Hz)
FREQUENCY (Hz)
MAX4356 toc68
20ns/div
______________________________________________________________________________________
21
MAX4356
Typical Operating Characteristics—Dual Supplies ±3V (continued)
(VCC = +3V and VEE = -3V, VDD = +3V, AGND = DGND = 0, VIN_ = 0, RL = 150Ω to AGND, 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, and TA = +25°C, unless otherwise
noted.)
OFFSET VOLTAGE DISTRIBUTION
300
MAX4356 toc71
SWITCHING TRANSIENT (GLITCH)
(AV = +2V/V)
MAX4356 toc70
SWITCHING TRANSIENT (GLITCH)
(AV = +1V/V)
MAX4356 toc69
250
VUPDATE
3V/div
VUPDATE
3V/div
200
150
VOUT
25mV/div
VOUT
25mV/div
100
50
0
20ns/div
20ns/div
-15 -13 -11 -9 -7
-5 -3 -1
1
3
5
OFFSET VOLTAGE (mV)
MAX4356 toc73
MAX4356 toc72
DIFFERENTIAL
GAIN (%)
DIFFERENTIAL
GAIN (%)
0.20
0.15
0.10
0.05
0
-0.05
LARGE-SIGNAL PULSE RESPONSE
WITH CAPACITIVE LOAD
(CL = 30pF, AV = +1V/V) MAX4356 toc74
DIFFERENTIAL GAIN AND PHASE
(RL = 1kΩ)
DIFFERENTIAL GAIN AND PHASE
(RL = 150Ω)
0.010
0.005
0
0.010
0.015
0.020
INPUT
1V/div
0.08
DIFFERENTIAL
PHASE (°)
0.25
0.20
0.15
0.10
0.05
0
-0.05
DIFFERENTIAL
PHASE (°)
MAX4356
16 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
0.06
OUTPUT
500mV/div
0.04
0.02
0
-0.02
10
10
20 30 40 50 60 70 80 90 100
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)
MAX4356 toc75
25ns/div
MEDIUM-SIGNAL PULSE RESPONSE
WITH CAPACITIVE LOAD
(CL = 30pF, AV = + 2V/V)
MAX4356 toc76
MAX4356 toc77
INPUT
0.5V/div
100mV/div
INPUT
50mV/div
OUTPUT
0.5V/div
OUTPUT
50mV/div
OUTPUT
50mV/div
25ns/div
22
25ns/div
______________________________________________________________________________________
25ns/div
16 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
RESET DELAY vs. CRESET
GAIN VS. TEMPERATURE
1
100m
RESET DELAY (s)
0.10
0.05
AV = +2V/V
0
-0.05
-0.10
MAX4356 toc79
0.15
NORMALIZED GAIN (dB)
10
MAX4356 toc78
0.20
10m
1m
100µ
10µ
1µ
AV = +1V/V
100n
-0.15
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
MAX4356 toc81
MAX4356 toc80
AV = + 2V/V
AV = +2V/V
VOSDKEY0
3V/div
VOSDKEY0
3V/div
100IRE
VOUT0
500mV/div
VOUT0
500mV/div
0IRE
50ns/div
50ns/div
______________________________________________________________________________________
23
MAX4356
Typical Operating Characteristics—Dual Supplies ±3V (continued)
(VCC = +3V and VEE = -3V, VDD = +3V, AGND = DGND = 0, VIN_ = 0, RL = 150Ω to AGND, 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.)
0
-1
-2
-3
-4
0
-1
-2
-3
-4
-2
-3
-4
-5
-6
-6
-7
-7
10
100
1000
-7
0.1
1
100
1000
0.1
-1
-2
-3
-4
RL = 1kΩ
1
0
-1
-2
-3
-4
1
0
-1
-2
-3
-4
-5
-5
-5
-6
-6
-6
-7
-7
10M
100M
1G
-7
100k
1M
FREQUENCY (Hz)
100M
100k
1G
-0.2
-0.3
-0.4
MAX4356 toc89
0.1
2
0
-0.1
-0.2
-0.3
-0.4
0
-2
-4
-5
-6
-0.7
-0.7
FREQUENCY (MHz)
CL = 30pF
CL = 15pF
-3
-0.6
1000
1G
-1
-0.6
100
CL = 45pF
1
-0.5
10
100M
LARGE-SIGNAL FREQUENCY RESPONSE
-0.5
1
10M
3
NORMALIZED GAIN (dB)
0
-0.1
RL = 1kΩ
0.2
NORMALIZED GAIN (dB)
0.1
0.1
1M
FREQUENCY (Hz)
LARGE-SIGNAL GAIN FLATNESS
0.3
MAX4356 toc88
RL = 150Ω
0.2
10M
FREQUENCY (Hz)
LARGE-SIGNAL GAIN FLATNESS
0.3
RL = 1kΩ
2
NORMALIZED GAIN (dB)
0
1000
3
MAX4356 toc86
2
100
SMALL-SIGNAL FREQUENCY RESPONSE
MEDIUM-SIGNAL FREQUENCY RESPONSE
NORMALIZED GAIN (dB)
1
1M
10
FREQUENCY (MHz)
3
MAX4356 toc85
RL = 1kΩ
100k
1
FREQUENCY (MHz)
LARGE-SIGNAL FREQUENCY RESPONSE
2
10
MAX4356 toc87
1
MAX4356 toc84
-1
-6
3
NORMALIZED GAIN (dB)
0
-5
FREQUENCY (MHz)
24
1
-5
0.1
RL = 150Ω
2
NORMALIZED GAIN (dB)
1
NORMALIZED GAIN (dB)
NORMALIZED GAIN (dB)
1
RL = 150Ω
2
SMALL-SIGNAL FREQUENCY RESPONSE
3
MAX4356 toc90
MAX4356 toc82
RL = 150Ω
2
MEDIUM-SIGNAL FREQUENCY RESPONSE
3
MAX4356 toc83
LARGE-SIGNAL FREQUENCY RESPONSE
3
NORMALIZED GAIN (dB)
MAX4356
16 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
16 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
MEDIUM-SIGNAL FREQUENCY RESPONSE
-70
-75
-80
-3
-5
-7
1M
10M
100M
-90
-100
-100
1M
10M
100M
10
100
OFF ISOLATION vs. FREQUENCY
1M
MAX4356 toc94
1
1
FREQUENCY (MHz)
DISABLED-OUTPUT IMPEDANCE
vs. FREQUENCY
-40
100k
-50
OFF ISOLATION (dB)
10
0.1
1G
ENABLED-OUTPUT IMPEDANCE
vs. FREQUENCY
OUTPUT IMPEDANCE (Ω)
OUTPUT IMPEDANCE (Ω)
-80
-95
100k
3RD HARMONIC
-60
-70
FREQUENCY (MHz)
100
-50
-90
FREQUENCY (Hz)
1k
-40
-85
1G
2ND HARMONIC
-30
MAX4356 toc95
100k
-20
10k
1k
100
MAX4356 toc96
CL = 15pF
-10
DISTORTION (Ω)
1
-1
-65
MAX4356 toc93
-60
CROSSTALK (dB)
NORMALIZED GAIN (dB)
CL = 30pF
-55
3
0
MAX4356 toc92
CL = 45pF
5
DISTORTION vs. FREQUENCY
CROSSTALK vs. FREQUENCY
-50
MAX4356 toc91
7
-60
-70
-80
-90
-100
10
-110
1
0.1
0.1
1
10
100
-120
100k
1000
1M
VOLTAGE NOISE (nV/√ Hz)
PSRR (dB)
-60
-65
100k
1M
10M
100M
INPUT VOLTAGE NOISE vs. FREQUENCY
LARGE-SIGNAL PULSE RESPONSE
1G
MAX4356 toc99
MAX4356 toc98
-55
1G
FREQUENCY (Hz)
1000
MAX4356 toc97
-50
100M
FREQUENCY (Hz)
FREQUENCY (MHz)
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
10M
INPUT
1V/div
100
OUTPUT
0.5V/div
-70
-75
1
10k
100k
1M
FREQUENCY (Hz)
10M
100M
10
100
1k
10k
100k
1M
10M
25ns/div
FREQUENCY (Hz)
______________________________________________________________________________________
25
MAX4356
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
MAX4356 toc100
MAX4356 toc101
VUPDATE
5V/div
INPUT
100mV/div
OUTPUT
50mV/div
VOUT
500mV/div
25ns/div
20ns/div
SWITCHING TRANSIENT (GLITCH)
OFFSET VOLTAGE HISTOGRAM
MAX4356 toc102
MAX4356 toc103
250
VUPDATE
5V/div
200
150
100
VOUT
25mV/div
50
0
-20 -18 -16 -14 -12 -10 -8
20ns/div
-6 -4 -2
0
OFFSET VOLTAGE (mV)
0.20
0.10
0.00
-0.10
0.20
0.10
0.00
0.10
-0.20
0 10 20 30 40 50 60 70 80 90 100
26
MAX4356 toc105
0.30
DIFF GAIN (%)
DIFFERENTIAL GAIN AND PHASE
(RL = 1kΩ)
MAX4356 toc104
DIFF GAIN (%)
DIFFERENTIAL GAIN AND PHASE
(RL = 150Ω)
0.3
0.2
0.1
0.0
-0.1
0 10 20 30 40 50 60 70 80 90 100
DIFF PHASE (°)
DIFF PHASE (°)
MAX4356
16 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
0.06
0.04
0.02
0.00
-0.02
0 10 20 30 40 50 60 70 80 90 100
0 10 20 30 40 50 60 70 80 90 100
IRE
IRE
______________________________________________________________________________________
16 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)
MAX4356 toc106
MAX4356 toc107
INPUT
1V/div
INPUT
100mV/div
OUTPUT
0.5V/div
OUTPUT
50mV/div
25ns/div
25ns/div
GAIN vs. TEMPERATURE
RESET DELAY vs. CRESET
MAX4356 toc109
0.15
100m
0.10
RESET DELAY (s)
NORMALIZED GAIN (dB)
10
1
MAX4356 toc108
0.20
0.05
0
-0.05
10m
1m
100µ
10µ
-0.10
1µ
-0.15
100n
10n
-0.20
-50
-25
0
25
50
75
100
1p
TEMPERATURE (°C)
10p 100p 1n
10n 100n 1µ 10µ 100µ
CRESET (F)
OSD SWITCHING TRANSIENT
(100IRE LEVEL SWITCH)
OSD SWITCHING 3.58MHz SIGNAL
MAX4356 toc111
MAX4356 toc110
VOSDKEY0
5V/div
100IRE
VOSDKEY0
5V/div
0IRE
VOUT0
250mV/div
VOUT0
250mV/div
50ns/div
50ns/div
______________________________________________________________________________________
27
MAX4356
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.)
MAX4356
16 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
Pin Description
PIN
NAME
1–4, 30–38, 103
N.C.
5, 7, 9, 11, 13,
15, 17, 19, 21, 23,
25, 27, 121, 123,
125, 127
IN0–IN15
6, 8, 10, 12, 14,
16, 18, 20, 65, 66,
100, 101, 102,
120, 122, 124,
126
AGND
Analog Ground
22, 24, 26, 28
A3–A0
Address Programming Inputs. Connect to DGND or VDD to select the address for individual
output address mode. See Table 3.
29, 67, 71, 75, 79,
83, 87, 91, 95, 99
VCC
Positive Analog Supply. Bypass each pin with a 0.1µF capacitor to AGND. Connect a single
10µF capacitor from one VCC pin to AGND.
39
DOUT
40
DGND
Digital Ground
41
AOUT
Address Recognition Output. AOUT drives low after successful chip address recognition.
42
SCLK
43
CE
44
MODE
Serial Interface Mode Select Input. Drive high for complete matrix mode (mode 1), or drive low
for individual output address mode (mode 0).
45
RESET
Asynchronous Reset Input/Output. Drive RESET low to initiate hardware reset. All matrix
settings are set to power-up defaults and all analog outputs are disabled. Additional power-on
reset delay may be set by connecting a small capacitor from RESET to DGND.
46
UPDATE
47
DIN
Serial Data Input. Data is clocked in on the falling edge of SCLK.
48
VDD
Digital Logic Supply. Bypass VDD with a 0.1µF capacitor DGND.
49–64
OSDKEY0–
OSDKEY15
68, 70, 72, 74, 76,
78, 80, 82, 84, 86,
88, 90, 92, 94, 96,
98
OUT0–
OUT15
69, 73, 77, 81, 85,
89, 93, 97, 128
VEE
Negative Analog Supply. Bypass each pin with a 0.1µF capacitor to AGND. Connect a single
10µF capacitor from one VEE pin to AGND.
104–119
OSDFILL0–
OSDFILL15
Dedicated OSD Analog Signal Buffered Inputs. For each output buffer amplifier OSDFILL, the
input signal is routed to output buffer amplifier OUT when the corresponding OSDKEY is low.
28
FUNCTION
No Connection. Not internally connected. Connect to AGND.
Buffered Analog Inputs
Serial Data Output. In complete matrix mode, data is clocked through the 96-bit Matrix Control
Shift register. In individual output address mode, data at DIN passes directly to DOUT.
Serial Clock Input
Clock Enable Input. Drive low to enable the serial data interface.
Update Input. Drive UPDATE low to transfer data from Mode registers to the matrix switch.
Digital Control Input. Control for the fast 2:1 OSD insertion multiplexer routing signal to output
buffers. A logic high routes the programmed IN_ analog input signal to the output buffer. A
logic low routes the dedicated OSDFILL_ input to the corresponding output buffer.
Buffered Analog Outputs. Gain is individually programmable for AV = +1V/V or AV = +2V/V
through the serial interface. Outputs may be individually disabled (high impedance). On
power-up or assertion of RESET, all outputs are disabled.
______________________________________________________________________________________
16 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
OSDFILL1
OSDFILL0
OSDFILL15
MAX4356
IN0
IN1
16 x 16
SWITCH MATRIX
AV*
2:1
OSD
MUX
IN2
AV*
IN15
AV*
RESET
POWER-ON
RESET
THERMAL
SHUTDOWN
DISABLE ALL OUTPUTS
256 16
SERIAL
INTERFACE
OUT1
OUT2
OUT15
16
VCC
VEE
AGND
VDD
DGND
DECODE LOGIC
DIN
SCLK
UPDATE
CE
OUT0
ENABLE/DISABLE
AV*
LATCHES
MATRIX REGISTER
96 BITS
DOUT
UPDATE REGISTER
16 BITS
AOUT
A0-A3 MODE
*AV = +1V/V OR +2V/V
Detailed Description
The MAX4356 is a highly integrated 16 ✕ 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 3-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).
In the Functional Diagram, the signal path of the
MAX4356 is from the inputs (IN0–IN15), through the
switching matrix, buffered by the output amplifiers, and
presented at the output terminals (OUT0–OUT15). The
other functional blocks are the serial interface and control logic. Each of the functional blocks is described in
detail below.
Analog Outputs
The MAX4356 outputs are high-speed voltage feedback amplifiers capable of driving 150Ω (75Ω back-terminated) loads. The gain, A V = +1V/V or +2V/V, is
selectable through programming bit 4 of the serial control word. Amplifier compensation is automatically opti-
OSDKEY0
OSDKEY15
OSDKEY1
mized to maximize the bandwidth for each gain selection. Each output can be individually enabled and disabled through bit 5 of the serial control word. When
disabled, the output is high impedance, presenting typically a 4kΩ load, and 3pF output capacitance, allowing
multiple outputs to be connected together in 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 MAX4356 is output
referred. Outputs are configured individually to connect
to any one of the 16 analog inputs, programmed to the
desired gain (AV = +1V/V or +2V/V), or disabled in a
high-impedance state.
Analog Inputs
The MAX4356 offers 16 analog input channels. Each
input is buffered before the crosspoint switch matrix,
allowing one input to cross-connect to 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.
______________________________________________________________________________________
29
MAX4356
Functional Diagram
MAX4356
16 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
Table 1. Operation Truth Table
CE
UPDATE
SCLK
DIN
DOUT
MODE
AOUT
RESET
1
X
X
X
X
X
X
1
No change in logic.
1
Data at DIN is clocked on the negative
edge of the SCLK into the 96-bit
Complete Matrix Mode register. DOUT
supplies original data in 96 SCLK
pulses later.
1
Data in the serial 96-bit Complete
Matrix Mode register is transferred
into parallel latches that control the
switching matrix.
1
Data at DIN is routed to the 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
0
1
0
1
↓
X
↓
Di
X
Di
Di-96
X
Di
1
1
0
1
1
1
OPERATION/COMMENTS
0
0
X
Di
Di
0
0
1
The 4-bit chip address A3 to A0 is
compared to D13 to D10. If equal, the
remaining 10 bits in the Individual
Output Address Mode register are
decoded, allowing reprogramming for
a single output. AOUT signals a
successful individual matrix update.
X
X
X
X
X
X
X
0
Asynchronous reset. All outputs are
disabled. Other logic remains
unchanged.
OSDFILL and OSDKEY Inputs
Digital Interface
Intended for on-screen display insertion, the 16 OSDFILL inputs are buffered analog signal inputs that are
routed exclusively 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.
Each OSD Insertion Mux is controlled through the corresponding OSDKEY digital input to provide fast pixel
switching.
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 serial
data output. SCLK is the serial data clock that clocks
data into the Data Input registers (Figure 2). Data at
DIN is loaded at each falling edge of SCLK. DOUT is
the data shifted out of the 96-bit Complete Matrix Mode
(Mode = 1). DIN passes directly to DOUT when in
Individual Output Address Mode (Mode = 0).
Switch Matrix
The MAX4356 has 256 individual T-switches making a
16 x 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 16 analog inputs. Any one input can be routed to all 16 outputs with no signal degradation.
30
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 D13 to D10 match
the address programming inputs (A3–A0) and UPDATE
is low. Table 1 is the operation truth table.
Programming the Matrix
The MAX4356 offers two programming modes: individual output address mode and complete matrix mode.
______________________________________________________________________________________
16 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
BIT
NAME
0
(LSB)
Input Address 0
1
Input Address 1
2
Input Address 2
3
4
5
6
IC ADDRESS BIT
A3
(MSB)
A2
ADDRESS
A1
A0
(LSB)
CHIP
ADDRESS
(HEX)
CHIP
ADDRESS
(DECIMAL)
0
0
0
0
0h
0
Input Address 3
0
0
0
1
1h
1
0
0
1
0
2h
2
0
0
1
1
3h
3
Gain Set
Gain Select for output
buffer, 0 = gain of +1V/V,
1 = gain of +2V/V
0
1
0
0
4h
4
0
1
0
1
5h
5
Output Enable
Enable bit for output, 0 =
disable, 1 = enable
0
1
1
0
6h
6
0
1
1
1
7h
7
LSB of output buffer
address
1
0
0
0
8h
8
1
0
0
1
9h
9
1
0
1
0
Ah
10
Output Address B0
Output Address B1
8
Output Address B2
10
FUNCTION
LSB of input channel
select address
MSB of input channel
select address
7
9
Table 3. Chip Address Programming for
16-Bit Control Word (Mode 0: Individual
Output Address Mode)
1
0
1
1
Bh
11
Output Address B3
MSB of output buffer
address
1
1
0
0
Ch
12
1
1
0
1
Dh
13
IC Address A0
LSB of selected chip
address
1
1
1
0
Eh
14
1
1
1
1
Fh
15
11
IC Address A1
12
IC Address A2
13
IC Address A3
MSB of selected chip
address
14
X
Don’t care
15
(MSB)
X
Don’t care
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 daisychaining and sending one long data word while still
being able to address immediately 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 through the serial interface
with a single 16-bit control word. The control word consists of two don’t care MSBs, the chip address bits, output address bits, an output enable/disable bit, an
output gain-set bit, and input address bits (Tables 2
through 6, and Figure 2).
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
96-bit control word consisting of 16 six-bit control
words programs all outputs. The 96-bit control word’s
first 6-bit control word (MSBs) programs output 15, and
the last 6-bit control word (LSBs) programs output 0
(Table 7 and Figures 4 and 5). Data clocked into the
96-bit Complete Matrix Mode register is latched on the
falling edge of UPDATE, and the outputs are immediately updated.
Initialization String
The Complete Matrix Mode (Mode = 1) is convenient to
use to program the matrix at power-up. In a large
matrix consisting of many MAX4356 devices, all the
devices can be programmed by sending a single-bit
______________________________________________________________________________________
31
MAX4356
Table 2. 16-Bit Serial Control Word Bit
Assignments (Mode 0: Individual Output
Address Mode)
MAX4356
16 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
16-BIT INDIVIDUAL OUTPUT ADDRESS MODE:
FIRST 2 BITS ARE DON'T CARE BITS, LAST 14 BITS CLOCKED INTO DIN WHEN MODE = 0 CREATE ADDRESS WORD;
IC ADDRESS A3–A0 IS COMPARED TO DIN13–DIN10 WHEN UPDATE IS LOW; IF
EQUAL, ADDRESSED OUTPUT IS UPDATED.
UPDATE
tHdMd
tSuMd
MODE
SCLK
IC ADDRESS = 5
OUTPUT ADDRESS = 3
INPUT ADDRESS 0 (LSB) = 0
INPUT ADDRESS 1 = 0
INPUT ADDRESS 2 = 1
INPUT ADDRESS 3 (MSB) = 1
GAIN SET = +1V/V
OUTPUT ENABLED
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
DON'T CARE X
DIN
OUTPUT (i) ENABLED, AV = +1V/V,
CONNECTED TO INPUT 12
EXAMPLE OF 16-BIT
SERIAL CONTROL WORD FOR OUTPUT
CONTROL IN INDIVIDUAL OUTPUT ADDRESS MODE
Figure 2. Mode 0: Individual Output Address Mode Timing and Programming Example
Table 4. Chip Address A3–A0 Pin
Programming
PIN
Table 5. Output Selection Programming
OUTPUT ADDRESS BIT
ADDRESS
A3
A2
A1
A0
DGND
DGND
DGND
DGND
CHIP
CHIP
ADDRESS ADDRESS
(DECIMAL)
(HEX)
0h
B3
(MSB)
B2
B1
B0
(LSB)
SELECTED
OUTPUT
0
0
0
0
0
0
0
0
0
1
1
0
1
0
2
DGND
DGND
DGND
VDD
1h
1
0
DGND
DGND
VDD
DGND
2h
2
0
0
1
1
3
DGND
DGND
VDD
VDD
3h
3
0
1
0
0
4
1
0
1
5
DGND
4h
4
0
DGND
VDD
5h
5
0
1
1
0
6
VDD
DGND
6h
6
0
1
1
1
7
0
0
0
8
DGND
VDD
DGND
DGND
VDD
DGND
VDD
DGND
VDD
VDD
VDD
7h
7
1
VDD
DGND
DGND
DGND
8h
8
1
0
0
1
9
VDD
DGND
DGND
VDD
9h
9
1
0
1
0
10
VDD
DGND
VDD
DGND
Ah
10
1
0
1
1
11
VDD
DGND
VDD
VDD
Bh
11
1
1
0
0
12
VDD
VDD
DGND
DGND
Ch
12
1
1
0
1
13
13
1
1
1
0
14
1
1
1
1
15
32
VDD
VDD
DGND
VDD
Dh
VDD
VDD
VDD
DGND
Eh
14
VDD
VDD
VDD
VDD
Fh
15
______________________________________________________________________________________
16 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
MAX4356
A0–A3
CHIP ADDRESS
SCLK
CE
4
MODE
4
16-BIT INDIVIDUAL OUTPUT ADDRESS
MODE REGISTER
SCLK
MODE
10
CE
MODE
DIN
S
A
DATA
ROUTING
GATE
B
96-BIT COMPLETE MATRIX MODE REGISTER
10
DOUT
96
MODE
OUTPUT ADDRESS DECODE
7
MODE
1
UPDATE
EN
96
AOUT
7
96-BIT PARALLEL LATCH
96
SWITCH DECODE
16
256
SWITCH MATRIX
OUTPUT ENABLE
Figure 3. Serial Interface Block Diagram
Table 6. Input Selection Programming
INPUT ADDRESS BIT
Table 7. 6-Bit Serial Control Word Bit
Assignments (Mode 1: Complete Matrix
Mode)
B3
(MSB)
B2
B1
B0
(LSB)
SELECTED
INPUT
BIT
NAME
FUNCTION
0
0
0
0
0
5 (MSB)
0
0
0
1
1
Output
Enable
Enable bit for output,
0 = disable, 1 = enable
0
0
1
0
2
4
0
0
1
1
3
Gain
Set
0
1
0
0
4
3
0
1
0
1
5
Input
Address 3
0
1
1
0
6
2
0
1
1
1
7
Input
Address 2
1
0
0
0
8
1
1
0
0
1
9
Input
Address 1
1
0
1
0
10
0 (LSB)
1
0
1
1
11
Input
Address 0
1
1
0
0
12
1
1
0
1
13
1
1
1
0
14
1
1
1
1
15
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
______________________________________________________________________________________
33
MAX4356
16 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
tMnHCk
tMnLCk
SCLK
tSuDi
tHdDi
DIN
tSuHUd
UPDATE
tMnLUd
tPdDo
DOUT
SCLK
EXAMPLE OF 6-BIT
SERIAL CONTROL
WORD FOR OUTPUT
CONTROL
NEXT CONTROL WORD
INPUT ADDRESS 0 (LSB) = 0
INPUT ADDRESS 1 = 1
INPUT ADDRESS 2 = 1
INPUT ADDRESS 3 (MSB) = 1
16 x 16 CROSSPOINT = 6-BIT
CONTROL WORD
GAIN SET = +1V/V
OUTPUT ENABLED
DIN
OUTPUT (i) ENABLED, AV = +1V/V,
CONNECTED TO INPUT 14
Figure 4. 6-Bit Control Word and Programming Example (Mode 1: Complete Matrix Mode Programming)
UPDATE
1
MODE
1
0
0
6-BIT CONTROL WORD
DIN
OUT2
OUT1
OUT0
MOST-SIGNIFICANT OUTPUT BUFFER CONTROL BITS ARE SHIFTED IN FIRST, I.E., OUT15, THEN OUT14, ETC.
LAST 6 BITS SHIFTED IN PRIOR TO UPDATE NEGATIVE EDGE PROGRAM OUT0.
Figure 5. Mode 1: Complete Matrix Mode Programming
34
______________________________________________________________________________________
16 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
On-Screen-Display Fast Mux
The MAX4356 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.
Switching between the programmed IN_ input from the
crosspoint switch matrix and the OSDFILL_ is accomplished by driving the dedicated OSDKEY_ digital
input. 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 MAX4356 features an asynchronous bidirectional
RESET with an internal 20kΩ pullup resistor to V DD.
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 96-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 (power-on reset) or thermal shutdown.
Since driving RESET low only clears the output buffer
enable bit in the matrix control latches, RESET can be
used to disable all outputs simultaneously. If no new
data has been loaded into the 96-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 through internal
circuitry. As the digital supply voltage ramps up crossing 2.5V, the MAX4356 holds RESET low for 40ns (typ).
Connecting a small capacitor from RESET to DGND
extends the power-on-reset delay. See Power-on Reset
vs. RESET Capacitance in the Typical Operating
Characteristics.
Thermal Shutdown
The MAX4356 features thermal shutdown protection
with temperature hysteresis. When the die temperature
exceeds +150°C, the MAX4356 pulls RESET low, disabling the output buffers. 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 MAX4356 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. 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 the
MAX4356 16 x 16 crosspoint devices.
The wired-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
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.
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
______________________________________________________________________________________
35
MAX4356
stream equal to n x 96 bits, where n is the number of
MAX4356 devices on the bus. The first 96-bit data word
programs the last MAX4356 in line (see Matrix
Programming under Applications Information).
MAX4356
16 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
IN (0–15)
IN (16–31)
IN (32–47)
IN (48–63)
16
16
IN MAX4356 OUT
16
16
IN MAX4356 OUT
16
16
IN MAX4356 OUT
16
16
IN MAX4356 OUT
16
16
IN MAX4356 OUT
16
16
IN MAX4356 OUT
16
IN
16
16
IN MAX4356 OUT
16
MAX4356 OUT
OUTPUTS (0–15)
IN (64–79)
IN (80–95)
IN (96–111)
IN (112–127)
16
16
IN MAX4356 OUT
16
IN
16
16
16
IN MAX4356 OUT
16
16
IN MAX4356 OUT
16
16
IN MAX4356 OUT
16
16
IN MAX4356 OUT
16
16
IN MAX4356 OUT
16
16
IN MAX4356 OUT
MAX4356 OUT
OUTPUTS (16–32)
Figure 6. 128 x 32 Nonblocking Matrix Using 16 x 16 Crosspoint Devices
crosspoint devices to reduce the number of outputs
that need to be wired together (see Figure 7).
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
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
higher frequencies, offsetting the rolloff from the parasitic capacitance. Another solution is to add a smallvalue inductor to the output.
On-Screen Display Insertion
The MAX4356 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
36
IN (0–15)
16
16
IN MAX4356 OUT
IN (16–31)
16
16
IN MAX4356 OUT
IN (32–47)
16
16
IN MAX4356 OUT
16
16
IN MAX4356 OUT
OUTPUTS (0–15)
16
16
IN MAX4356 OUT
IN (48–63)
16
16
IN MAX4356 OUT
Figure 7. 64 x 16 Nonblocking Matrix with Reduced Capacitive
Loading
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).
______________________________________________________________________________________
16 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
COMPUTER CONTROL
CAMERAS
30
ISOLATION RESISTANCE (Ω)
MAX4356
OPTIMAL ISOLATION RESISTANCE
vs. CAPACITIVE LOAD
IN0
SYNC0
IN1
25
OUT0
MONITOR 0
SYNC1
20
IN15
15
OUT1
MAX4356
10
MONITOR 1
OSDFILL0
SYNC0
OSD
SYNC15
OSDKEY0
5
OSDFILL1
SYNC1
OSD
0
0
100
200
300
400
500
CAPACITIVE LOAD (pF)
SYNC15
OSD
OSDKEY1
OUT15
MONITOR 15
OSDFILL15
OSDKEY15
Figure 8. Optimal Isolation Resistor vs. Capacitive Load
MEMORY
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 Signal and Board Routing Issues
Improper signal routing causes performance problems
such as crosstalk. The MAX4356 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 by parallel traces as well as directly
above and below on adjoining PC board layers.
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 MAX4356 acheives 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
Figure 9. Improved Implementation of On-Screen Display
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 MAX4356 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 MAX4356 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
MAX4356 consumes 195mW (0.76mW/point).
Driving a PC Board Interconnect or a
Cable (AV = +1V/V or +2V/V)
The MAX4356 output buffers can be programmed to
either AV = +1V/V or +2V/V. The +1V/V configuration is
typically used when driving a short-length (less than
3cm), high-impedance "local" PC board trace. 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 voltagedivider that divides the video signal in half. Set the gain
to +2V/V to transmit a standard 1V video signal down a
______________________________________________________________________________________
37
MAX4356
16 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
cable. The series 75Ω resistor is called the back-match,
reverse termination, or series termination. This 75Ω
resistor reduces reflections, and provides isolation,
increasing the output capacitive driving capability.
Matrix Programming
The MAX4356’s unique digital interface simplifies programming multiple MAX4356 devices in an array.
Multiple devices are connected with DOUT of the first
device connecting to DIN of the second device, and so
on (Figure 10). 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 daisy-chaining and
sending one long data word while still being able to
address immediately 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
through hardware pin strapping of A3–A0. The host
then communicates with the device by sending a 16-bit
word consisting of 2 don’t care MSB bits, 4 chip
address bits, and 10 bits of data to make the word
exactly 2 bytes in length. The 10 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 4
bits to select the 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 x 96 bits are sent to program the entire matrix, and where n = the number of
MAX4356 devices connected in series. This long 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 96 bits per
crosspoint device. This programming method is most
often used at startup to initially configure the switching
matrix.
38
+5V Single-Supply Operation with
AV = +1V/V and +2V/V
The MAX4356 guarantees operation with single +5V
supply and 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 +5V single supply, combine the MAX4356
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-toRail® 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.
The MAX4383 is a quad op amp available in a 14-pin
TSSOP package. The MAX4380/MAX4381/MAX4382
and MAX4384 offer individual output high-impedance
disable making these amplifiers suitable for wired-OR
connections.
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
______________________________________________________________________________________
16 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
DOUT
DIN
HOST
CONTROLLER
CHIP ADDRESS = 1
MAX4356
A3
SCLK
CHIP ADDRESS = 2
DOUT
DIN
DIN
MAX4356
A3
SCLK
DOUT
MAX4356
A3
SCLK
CE
A2
A1
MODE
A1
A0
UPDATE
A0
CE
A2
CE
A2
MODE
A1
MODE
UPDATE
A0
UPDATE
MAX4356
CHIP ADDRESS = 0
VDD
NEXT DEVICE
VDD
VIRTUAL SERIAL BUS (MODE 0: INDIVIDUAL OUTPUT ADDRESS MODE)
Figure 10. Matrix Mode Programming
+5V
+5V
VCC
OUT0
1VP-P
Z0 = 75Ω
2VP-P
U2
IN0
OUT1
75Ω
IN1
MONITOR 0
220µF
75Ω
OUT15
500Ω
IN15
500Ω
MAX4356
GND
U2 = MAX4450
OR 1/4 MAX4383
VEE
Figure 11. Typical Single +5V Supply Application
Chip Information
TRANSISTOR COUNT: 24,883
PROCESS: BiCMOS
______________________________________________________________________________________
39
16 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
103 N.C.
104 ODSFILL0
105 ODSFILL1
106 ODSFILL2
107 ODSFILL3
108 ODSFILL4
109 ODSFILL5
110 ODSFILL6
111 ODSFILL7
112 ODSFILL8
113 ODSFILL9
114 ODSFILL10
115 ODSFILL11
116 ODSFILL12
117 ODSFILL13
119 ODSFILL15
118 ODSFILL14
120 AGND
121 IN0
122 AGND
123 IN1
124 AGND
125 IN2
126 AGND
127 IN3
128 VEE
MAX4356
Pin Configuration
N.C. 1
102 AGND
N.C. 2
101 AGND
N.C.
3
100 AGND
N.C.
4
99
IN4
5
AGND
6
97 VEE
IN5
7
96 OUT1
AGND
8
95 VCC
IN6
9
94 OUT2
93 VEE
AGND 10
92 OUT3
IN7 11
91 VCC
AGND 12
90 OUT4
IN8 13
MAX4356
AGND 14
89 VEE
88 OUT5
IN9 15
87 VCC
AGND 16
86 OUT6
IN10 17
85 VEE
AGND 18
84 OUT7
IN11 19
83 VCC
AGND 20
82 OUT8
IN12 21
81 VEE
A3 22
80 OUT9
IN13 23
A2 24
79
VCC
IN14 25
78
OUT10
77 VEE
A1 26
______________________________________________________________________________________
OSDKEY0 64
OSDKEY1 63
AGND
OSDKEY2 62
65
OSDKEY3 61
AGND
N.C. 38
OSDKEY4 60
66
OSDKEY5 59
VCC
N.C. 37
OSDKEY6 58
67
OSDKEY7 57
OUT15
N.C. 36
OSDKEY8 56
68
OSDKEY9 55
VEE
N.C. 35
OSDKEY10 54
69
OSDKEY11 53
OUT14
N.C. 34
OSDKEY12 52
70
OSDKEY13 51
VCC
N.C. 33
OSDKEY14 50
71
OSDKEY15 49
OUT13
N.C. 32
VDD 48
72
DIN 47
VEE
N.C. 31
UPDATE 46
73
RESET 45
OUT12
N.C. 30
MODE 44
74
CE 43
VCC
VCC 29
SCLK 42
OUT11
75
AOUT 41
76
A0 28
DGND 40
IN15 27
DOUT 39
40
VCC
98 OUT0
16 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
TQFP14x20x1.4mm.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 ____________________ 41
© 2001 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.
MAX4356
Package Information