Maxim MAX4357ECD 32 x 16 nonblocking video crosspoint switch with i/o buffer Datasheet

19-2209; Rev 0; 10/01
32 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
The MAX4357 is a 32 ✕ 16 highly integrated video
crosspoint switch matrix with input and output buffers.
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. 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 MAX4357 is available in a 128-pin TQFP package
and specified over an extended -40°C to +85°C temperature range.
Features
♦ 32 ✕ 16 Nonblocking Matrix with Buffered Inputs
and Outputs
♦ Operates from a ±3V, ±5V, or +5V Supply
♦ 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 220mW Power Consumption (0.43mW per
Point)
Ordering Information
Applications
Security Systems
PART
MAX4357ECD
Video Routing
Video-On-Demand Systems
TEMP. RANGE
PIN-PACKAGE
-40°C to +85°C
128 TQFP
Pin Configuration appears at end of data sheet.
Functional Diagram
Typical Operating Circuit
MAX4357
AV*
IN1
CAMERAS
IN0
MONITOR
IN1
OUT1
MAX4357
IN2
AV*
IN31
AV*
OUT1
OUT2
OUT15
MONITOR
RESET
POWER-ON
RESET
THERMAL
SHUTDOWN
DISABLE ALL OUTPUTS
IN31
AV*
32 x 16
SWITCH MATRIX
OUT0
OUT0
ENABLE/DISABLE
IN0
512 16
16
VCC
VEE
AGND
VDD
DGND
DECODE LOGIC
OUT15
MONITOR
DIN
SCLK
UPDATE
CE
SERIAL
INTERFACE
LATCHES
MATRIX REGISTER
112 BITS
DOUT
UPDATE REGISTER
16 BITS
AOUT
*AV = +1V/V OR +2V/V
A0-A3 MODE
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
MAX4357
General Description
MAX4357
32 x 16 Nonblocking Video Crosspoint Switch
with 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_ 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..........................(VDD + 0.3V) to (DGND - 0.3V)
Current into Any Analog Input Pin (IN_) ...........................±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, 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
MAX
UNITS
4.5
10.5
V
2.7
5.5
V
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
VIN_
AV = +2V/V
2
TYP
(VEE + 2.5V) < VIN_ < (VCC - 2.5V),
AV = +1V/V, RL = 150Ω
AV = +1V/V
Input Voltage Range
MIN
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
_______________________________________________________________________________________
V
32 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
(VCC = +5V, VEE = -5V, VDD = +5V, AGND = DGND = 0, VIN_ = 0, 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
SYMBOL
VOUT
CONDITIONS
MIN
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
VEE + 1
VCC - 1.2
RL = 150Ω
VEE + 2.5
VCC - 2.5
4
V
µA
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
0.004
60
MΩ
1
70
100
Outputs enabled
mV
µA
dB
150
175
Outputs disabled
55
75
Outputs enabled,
TA = +25°C
95
150
Outputs enabled
Outputs disabled
IDD
11
UNITS
(VEE + 1V) < VIN_ < (VCC - 1.2V)
Quiescent Supply Current
IEE
MAX
RL = 10kΩ
IB
Input Resistance
TYP
mA
175
50
75
4
8
_______________________________________________________________________________________
3
MAX4357
DC ELECTRICAL CHARACTERISTICS—DUAL SUPPLIES ±5V (continued)
MAX4357
32 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
DC ELECTRICAL CHARACTERISTICS—DUAL SUPPLIES ±3V
(VCC = +3V, VEE = -3V, VDD = +3V, AGND = DGND = 0, VIN_ = 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
2.00
2.06
RL = 10kΩ
0.5
1.5
RL = 150Ω
0.5
2
TCAV
10
VIN_
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
VOUT
VOFFSET
ppm/°C
RL = 10kΩ
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
IB
RIN
%
4
11
(VEE + 1V) < VIN_ < (VCC - 1.2V)
10
AV = +1V/V
±5
±20
AV = +2V/V
±10
±40
_______________________________________________________________________________________
V
V
µA
MΩ
mV
32 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
(VCC = +3V, VEE = -3V, VDD = +3V, AGND = DGND = 0, VIN_ = 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
90
Outputs disabled
45
Outputs enabled
85
Outputs disabled
40
µA
dB
mA
3
IDD
DC ELECTRICAL CHARACTERISTICS—SINGLE SUPPLY +5V
(VCC = +5V, VEE = 0, VDD = +5V, AGND = DGND = 0, VIN_ = +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
Output 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
3
RL = 150Ω
0.5
3
V
TCAV
VIN
VOUT
TYP
10
ppm/°C
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
MAX4357
DC ELECTRICAL CHARACTERISTICS—DUAL SUPPLIES ±3V (continued)
MAX4357
32 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
DC ELECTRICAL CHARACTERISTICS—SINGLE SUPPLY +5V (continued)
(VCC = +5V, VEE = 0, VDD = +5V, AGND = DGND = 0, VIN_ = +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
SYMBOL
RIN
VOFFSET
ISC
ZOUT
IOD
PSRR
ICC
Quiescent Supply Current
IEE
IDD
6
CONDITIONS
MIN
IB
VEE + 1V < VIN_ < VCC - 1.2V
TYP
MAX
UNITS
4
11
µA
10
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
RL = ∞
RL = ∞
0.004
TA = +25°C to +85°C
50
TA = -40°C to +85°C
35
65
Outputs enabled, TA = +25°C
90
Outputs disabled
40
Outputs enabled, TA = +25°C
85
Outputs disabled
35
4
_______________________________________________________________________________________
±40
1
mV
µA
dB
mA
32 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
(V CC - V EE) = +4.5V to +10.5V, V DD = +2.7V to +5.5V, AGND = DGND = 0, V IN _ = 0, R L = 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 = +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
VDD = +5.0V
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_ = 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
SR
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
MAX
UNITS
MHz
MHz
MHz
MHz
MHz
MHz
Vµs
_______________________________________________________________________________________
7
MAX4357
LOGIC-LEVEL CHARACTERISTICS
MAX4357
32 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
AC ELECTRICAL CHARACTERISTICS—DUAL SUPPLIES ±5V (continued)
(VCC = +5V, VEE = -5V, VDD = +5V, AGND = DGND = 0, VIN_ = 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_ = 0, RL = 150Ω to AGND, AV = +1V/V, and TA = +25°C, unless otherwise noted.)
PARAMETER
8
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
MIN
TYP
AV = +1V/V
90
AV = +2V/V
65
AV = +1V/V
90
AV = +2V/V
65
AV = +1V/V
30
AV = +2V/V
35
AV = +1V/V
15
AV = +2V/V
15
AV = +1V/V
15
AV = +2V/V
15
AV = +1V/V
12
AV = +2V/V
12
_______________________________________________________________________________________
MAX
UNITS
MHz
MHz
MHz
MHz
MHz
MHz
32 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
(VCC = +3V, VEE = -3V, VDD = +3V, AGND = DGND = 0, VIN_ = 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
AV = +1V/V
60
AV = +2V/V
60
MAX
UNITS
Vµs
ns
Switching Transient (Glitch)
(Note 3)
AV = +1V/V
15
AV = +2V/V
20
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
dB
Off-Isolation, Input to Output
f = 6MHz
-112
dB
73
µVRMS
5
pF
3
pF
30
pF
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
Ω
_______________________________________________________________________________________
9
MAX4357
AC ELECTRICAL CHARACTERISTICS—DUAL SUPPLIES ±3V (continued)
MAX4357
32 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
AC ELECTRICAL CHARACTERISTICS—SINGLE SUPPLY +5V
(VCC = +5V, VEE = 0, VDD = +5V, AGND = DGND = 0, VIN_ = 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 I/O Buffers
((VCC - VEE) = +4.5V to +10.5V, VDD = +2.7V to +5.5V, DGND = AGND = 0, VIN_ = 0 for dual supplies, VIN_ = +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. )
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
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
Delay: SCLK to DOUT Valid
Setup: CE to SCLK
SYMBOL
CONDITIONS
MIN
tSuCe
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
Minimum High Time: SCLK
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.
Note 2: Logic-level characteristics apply to the following pins: DIN, DOUT, SCLK, CE, UPDATE, RESET, A3–A0, MODE, and AOUT.
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
MAX4357
SWITCHING CHARACTERISTICS
MAX4357
32 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
Symbol Definitions
SYMBOL
12
TYPE
DESCRIPTION
Ao
Signal
Address Valid Flag
(AOUT)
Ce
Signal
Clock Enable (CE)
Ck
Signal
Clock (SCLK)
Di
Signal
Serial Data In (DIN)
Do
Signal
Serial Data Output
(DOUT)
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
Naming Conventions
• 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 50% point of a transition.
• 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 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 set up and hold designations applied
to observable I/O signals.
______________________________________________________________________________________
32 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
TIMING PARAMETER DEFINITIONS
DATA AND CONTROL TIMING
NAME
tHdDi
tMnHCk
tMnLCk
tMnLUd
Ce: CE
tSuCe
tHdCe
Ck: SCLK
tMnHCk
tSuDi
tHdDi
tMnLCk
Di: DIN
Do: DOUT
tMnLUd
tPdDo
tHdUd
Ud: UPDATE
tSuUd
tWTrVo
tPdUdVo
Hi-Z
Vo: OUT_
Hi-Z
Ao: AOUT
tPdUdAo
Rst: RESET
tPdHOeVo
Oe: OUTPUT ENABLE
tPdLOeVo
tPdRstVo
tMnlRst
DESCRIPTION
Hold Time: Clock to Data In
Min High Time: Clk
Min Low Time: Clk
tSuHUd
Not Valid
Min Low Time: Update
Setup Time: UPDATE to Clk with UPDATE High
Setup Time: UPDATE to Clk with UPDATE Low
tHdHUd
Not Valid
Hold Time: Clk to UPDATE with UPDATE high
Hold Time: Clk to UPDATE with UPDATE Low
tPdDiDo
tMnMd
tMxTr
tMnLRst
tPdRstVo
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
Delay: UPDATE to Aout
tPdUdAo
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
Figure 1. Timing Diagram
______________________________________________________________________________________
13
MAX4357
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.)
-2
AV = +1V/V
-4
0
-1
AV = +2V/V
-2
-3
-4
-2
-4
-5
-6
-7
-7
100
-7
0.1
1000
1
1000
0.1
1
-2
AV = +1V/V
-4
AV = +1V/V
0
-1
-2
AV = +2V/V
-3
-4
-1
-3
-4
-6
-6
-7
-7
1000
AV = +2V/V
-2
-6
100
AV = +1V/V
0
-5
10
0.1
1
10
100
0.1
1000
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)
AV = +1V/V
0.4
0.3
0.2
0.1
0.0
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)
0.5
AV = +1V/V
0.2
NORMALIZED GAIN (dB)
0.6
RL = 1kΩ
MAX4357 toc08
MAX4357 toc07
0.3
MAX4357 toc09
FREQUENCY (MHz)
0.7
0.1
1000
RL = 1kΩ
1
-5
1
100
2
-5
-7
10
SMALL-SIGNAL FREQUENCY RESPONSE
3
NORMALIZED GAIN (dB)
-1
RL = 1kΩ
2
NORMALIZED GAIN (dB)
AV = +2V/V
0
0.1
1
FREQUENCY (MHz)
MEDIUM-SIGNAL FREQUENCY RESPONSE
3
MAX4357 toc04
RL = 1kΩ
2
-3
100
FREQUENCY (MHz)
LARGE-SIGNAL FREQUENCY RESPONSE
1
10
MAX4357 toc05
10
AV = +2V/V
-3
-6
3
NORMALIZED GAIN (dB)
-1
-6
1
AV = +1V/V
0
-5
FREQUENCY (MHz)
14
1
-5
0.1
RL = 150Ω
2
MAX4357 toc06
-1
AV = +1V/V
1
SMALL-SIGNAL FREQUENCY RESPONSE
3
NORMALIZED GAIN (dB)
0
-3
2
NORMALIZED GAIN (dB)
NORMALIZED GAIN (dB)
AV = +2V/V
RL = 150Ω
MAX4357 toc02
MAX4357 toc01
RL = 150Ω
2
1
3
MAX4357 toc03
MEDIUM-SIGNAL FREQUENCY RESPONSE
LARGE-SIGNAL FREQUENCY RESPONSE
3
NORMALIZED GAIN (dB)
MAX4357
32 x 16 Nonblocking Video Crosspoint Switch
with 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 I/O Buffers
CL = 15pF
-2
-3
-4
-5
6
5
CL = 30pF
3
2
-6
0
-7
-1
10
100
0.1
1000
1
10
-70
-80
-100
100
AV = +2V/V
1000
-60
-65
-70
0
-20
-30
-50
-60
-80
-80
-85
-90
-90
-100
10
100
2ND HARMONIC
-40
-70
1
AV = +1V/V
-10
-75
0.1
1000
3ND HARMONIC
0.1
1
10
FREQUENCY (MHz)
-30
2ND HARMONIC
-50
3ND HARMONIC
-70
-80
1M
100k
OUTPUT IMPEDANCE (Ω)
OUTPUT IMPEDANCE (Ω)
-20
1000
DISABLED OUTPUT IMPEDANCE
vs. FREQUENCY
MAX4357 toc17
1000
MAX4357 toc16
AV = +2V/V
-10
100
FREQUENCY (MHz)
ENABLED OUTPUT IMPEDANCE
vs. FREQUENCY
DISTORTION vs. FREQUENCY
1000
DISTORTION vs. FREQUENCY
-55
FREQUENCY (MHz)
100
FREQUENCY (MHz)
-50
-90
DISTORTION (dBc)
100
DISTORTION (dBc)
-60
-60
10
-45
CROSSTALK (dB)
CROSSTALK (dB)
-50
-40
CL = 15pF
CROSSTALK vs. FREQUENCY
-40
MAX4357 toc13
AV = +1V/V
0
0
-1
MAX4357 toc14
CROSSTALK vs. FREQUENCY
10
CL = 30pF
1
FREQUENCY (MHz)
-40
1
2
-3
1
FREQUENCY (MHz)
0.1
3
-2
0.1
1000
4
MAX4357 toc15
1
CL = 45pF
5
100
10
1
MAX4357 toc18
0.1
6
CL = 15pF
1
MAX4357 toc12
CL = 45pF
7
4
7
NORMALIZED GAIN (dB)
0
-1
8
NORMALIZED GAIN (dB)
NORMALIZED GAIN (dB)
1
9
MAX4357 toc11
CL = 45pF
CL = 30pF
2
MAX4357 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
-100
1
0.1
0.1
1
10
FREQUENCY (MHz)
100
1000
0.1
1
10
FREQUENCY (MHz)
100
1000
0.1
1
10
100
1000
FREQUENCY (MHz)
______________________________________________________________________________________
15
MAX4357
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
MAX4357 toc20
-50
INPUT VOLTAGE NOISE vs. FREQUENCY
-50
MAX4357 toc19
-40
-60
-65
-100
MAX4357 toc21
OFF-ISOLATION vs. FREQUENCY
OFF ISOLATION (dB)
MAX4357
32 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
100
-70
-110
-120
100k
-75
1M
10M
100M
1G
10
10k
FREQUENCY (Hz)
100k
1M
10M
100M
10
FREQUENCY (Hz)
LARGE-SIGNAL PULSE RESPONSE
(AV = +1V/V)
OUTPUT
1V/div
OUTPUT
1V/div
OUTPUT
100mV/div
20ns/div
SWITCHING TIME
(AV = +1V/V)
MAX4357 toc25
16
SWITCHING TIME
(AV = +2V/V)
MAX4357 toc26
VUPDATE
5V/div
VUPDATE
5V/div
VOUT
500mV/div
VOUT
1V/div
20ns/div
10M
20ns/div
20ns/div
MEDIUM-SIGNAL PULSE RESPONSE
(AV = +2V/V)
1M
MAX4357 toc24
INPUT
100mV/div
20ns/div
100k
MEDIUM-SIGNAL PULSE RESPONSE
(AV = +1V/V)
INPUT
500mV/div
OUTPUT
100mV/div
10k
MAX4357 toc23
INPUT
1V/div
INPUT
50mV/div
1k
FREQUENCY (Hz)
LARGE-SIGNAL PULSE RESPONSE
(AV = +2V/V)
MAX4357 toc22
100
20ns/div
______________________________________________________________________________________
MAX4357 toc27
32 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
SWITCHING TRANSIENT (GLITCH)
(AV = +2V/V)
MAX4357 toc28
OFFSET VOLTAGE DISTRIBUTION
MAX4357 toc29
VUPDATE
5V/div
300
MAX4357 toc30
SWITCHING TRANSIENT (GLITCH)
(AV = +1V/V)
250
VUPDATE
5V/div
200
150
VOUT
25mV/div
100
VOUT
25mV/div
50
0
20ns/div
-14 -12 -10 -8 -6 -4 -2
20ns/div
0
2
4
6
OFFSET VOLTAGE (mV)
0.015
0.010
0.005
0.000
-0.005
0.15
0.10
0.05
0.00
-0.05
MAX4357 toc33
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
LARGE-SIGNAL PULSE RESPONSE WITH
CAPACITIVE LOAD (CL = 30pF, AV = +1V/V)
MAX4357 toc32
0.08
0.06
0.04
0.02
0.00
-0.02
DIFF GAIN (%)
DIFFERENTIAL GAIN AND PHASE vs.
DC VOLTAGE (RL = 1kΩ)
MAX4357 toc31
DIFF GAIN (%)
DIFFERENTIAL GAIN AND PHASE vs.
DC VOLTAGE (RL = 150Ω)
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
20ns/div
MEDIUM-SIGNAL PULSE RESPONSE WITH
CAPACITIVE LOAD (CL = 30pF, AV = +2V/V)
MEDIUM-SIGNAL PULSE RESPONSE WITH
CAPACITIVE LOAD (CL = 30pF, AV = +1V/V)
LARGE-SIGNAL PULSE RESPONSE WITH
CAPACITIVE LOAD (CL = 30pF, AV = +2V/V)
MAX4357 toc36
MAX4357 toc35
MAX4357 toc34
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
MAX4357
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.)
RESET DELAY (s)
AV = +2V/V
0
AV = +1V/V
-0.05
10m
1m
100µ
10µ
-0.10
1µ
-0.15
100n
-50
-25
0
25
50
TEMPERATURE (°C)
75
100
60
50
ICC
40
IEE
30
20
10
10n
-0.20
18
100m
SUPPLY CURRENT (mA)
0.10
0.05
70
MAX4357 toc38
MAX4357 toc37
0.15
SUPPLY CURRENT vs. TEMPERATURE
RESET DELAY vs. RESET CAPACITANCE
10
1
MAX4357 toc39
GAIN vs. TEMPERATURE
0.20
NORMALIZED GAIN (dB)
MAX4357
32 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
IDD
0
1p
10p 100p 1n
10n 100n 1µ 10µ 100µ
CRESET (F)
-50
-25
0
25
50
TEMPERATURE (°C)
______________________________________________________________________________________
75
100
32 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
-3
-4
-0
-1
AV = +2V/V
-2
-3
-4
-6
-6
-7
100
1000
-7
0.1
1
1000
0.1
-1
-2
AV = +1V/V
-4
RL = 1kΩ
2
AV = +2V/V
1
-0
AV = +1V/V
-1
-2
-3
-4
-0
-1
-2
-4
-5
-6
-6
-7
-7
100
LARGE-SIGNAL GAIN FLATNESS
vs. FREQUENCY
LARGE-SIGNAL GAIN FLATNESS
vs. FREQUENCY
MAX4357 toc46
0.6
AV = +1V/V
0.5
0.4
0.3
0.2
AV = +2V/V
0.3
0.2
0.1
0.0
-0.1
0
-0.3
-0.1
-0.4
1
AV = +2V/V
-0.2
10
FREQUENCY (MHz)
100
1000
1
10
100
1000
LARGE-SIGNAL FREQUENCY RESPONSE
(AV = +1V/V)
3
2
CL = 45pF
CL = 30pF
1
NORMALIZED GAIN (dB)
0.6
AV = +1V/V
0.4
NORMALIZED GAIN (dB)
0.7
0.1
FREQUENCY (MHz)
RL = 1kΩ
0.5
1000
MAX4357 toc47
10
FREQUENCY (MHz)
0.8
0.1
1
FREQUENCY (MHz)
0.9
0.1
-7
0.1
1000
AV = +2V/V
-3
-6
100
1000
AV = +1V/V
1
-5
10
100
RL = 1kΩ
2
-5
1
10
SMALL-SIGNAL FREQUENCY RESPONSE
3
NORMALIZED GAIN (dB)
-0
0.1
1
FREQUENCY (MHz)
MEDIUM-SIGNAL FREQUENCY RESPONSE
3
NORMALIZED GAIN (dB)
AV = +2V/V
-3
100
MAX4357 toc44
RL = 1kΩ
1
10
FREQUENCY (MHz)
MAX4357 toc43
3
2
MAX4357 toc42
-4
-7
LARGE-SIGNAL FREQUENCY RESPONSE
NORMALIZED GAIN (dB)
-3
-6
10
AV = +2V/V
-2
-5
1
AV = +1V/V
-1
-5
FREQUENCY (MHz)
NORMALIZED GAIN (dB)
1
-0
-5
0.1
RL = 150Ω
2
MAX4357 toc45
AV = +2V/V
-2
AV = +1V/V
SMALL-SIGNAL FREQUENCY RESPONSE
3
NORMALIZED GAIN (dB)
1
NORMALIZED GAIN (dB)
NORMALIZED GAIN (dB)
-0
-1
2
RL = 150Ω
MAX4357 toc41
AV = +1V/V
1
MEDIUM-SIGNAL FREQUENCY RESPONSE
3
MAX4357 toc40
2
RL = 150Ω
MAX4357 toc48
LARGE-SIGNAL FREQUENCY RESPONSE
3
0
CL = 15pF
-1
-2
-3
-4
-5
-6
-7
0.1
1
10
FREQUENCY (MHz)
100
1000
0.1
1
10
100
1000
FREQUENCY (MHz)
______________________________________________________________________________________
19
MAX4357
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.)
MEDIUM-SIGNAL FREQUENCY RESPONSE
(AV = +1V/V)
CL = 15pF
-1
-2
-3
-4
6
5
4
CL = 30pF
3
2
CL = 15pF
4
3
2
0
-6
0
-2
1
100
1
CROSSTALK VS. FREQUENCY
MAX4357 toc52
AV = + 1V/V
-50
-60
-65
-70
1000
0.1
AV = + 2V/V
-45
-10
-50
-55
-60
-40
-50
-60
-70
-80
-85
-75
-90
-80
-100
10M
100M
1G
100k
1M
10M
FREQUENCY (Hz)
FREQUENCY (Hz)
DISTORTION VS. FREQUENCY
ENABLED OUTPUT IMPEDANCE
VS. FREQUENCY
DISABLED OUTPUT IMPEDANCE
VS. FREQUENCY
-50
-60
3RD HARMONIC
-70
-80
100
10
1
100M
MAX4357 toc57
100k
OUTPUT IMPEDANCE (Ω)
-40
1M
MAX4357 toc56
1000
OUTPUT IMPEDANCE (Ω)
2ND HARMONIC
-30
1M
3RD HARMONIC
FREQUENCY (Hz)
AV = + 2V/V
-20
100k
1G
MAX4357 toc55
-10
100M
1000
2ND HARMONIC
-30
-80
10M
AV = + 1V/V
-20
-70
1M
100
DISTORTION VS. FREQUENCY
-65
100k
10
CROSSTALK VS. FREQUENCY
-75
-90
1
FREQUENCY (MHz)
-40
CROSSTALK (dB)
-55
-35
100
DISTORTION (dB)
-45
-30
10
FREQUENCY (MHz)
FREQUENCY (MHz)
-40
CL = 15pF
-3
0.1
1000
MAX4357 toc53
10
CL = 30pF
1
-1
1
CL = 45pF
5
1
0.1
MAX4357 toc51
6
-5
-7
CROSSTALK (dB)
7
MAX4357 toc54
-0
CL = 45pF
7
NORMALIZED GAIN (dB)
NORMALIZED GAIN (dB)
CL = 30pF
8
NORMALIZED GAIN (dB)
CL = 45pF
1
9
MAX4357 toc49
3
2
MEDIUM-SIGNAL FREQUENCY RESPONSE
(AV = +2V/V)
MAX4357 toc50
LARGE-SIGNAL FREQUENCY RESPONSE
(AV = +2V/V)
DISTORTION (dB)
MAX4357
32 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
10k
1k
100
10
-90
-100
1M
10M
FREQUENCY (Hz)
20
1
0.1
100k
100M
0.1
1
10
FREQUENCY (MHz)
100
1000
0.1
1
10
FREQUENCY (MHz)
______________________________________________________________________________________
100
1000
32 x 16 Nonblocking Video Crosspoint Switch
with 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
MAX4357 toc59
-50
OFF ISOLATION (dB)
-50
MAX4357 toc58
-40
-60
-65
-100
-70
MAX4357 toc60
OFF-ISOLATION VS. FREQUENCY
100
-110
-120
-75
1M
10M
100M
1G
10
10k
100k
1M
10M
100M
10
100
1k
10k
100k
1M
FREQUENCY(Hz)
LARGE-SIGNAL PULSE RESPONSE
(AV = +1V/V)
LARGE-SIGNAL PULSE RESPONSE
(AV = +2V/V)
MEDIUM-SIGNAL PULSE RESPONSE
(AV = +1V/V)
INPUT
500mV/div
OUTPUT
100mV/div
OUTPUT
1V/div
OUTPUT
1V/div
SWITCHING TIME
(AV = +1V/V)
VUPDATE
3V/div
VUPDATE
3V/div
VOUT
500mV/div
20ns/div
SWITCHING TIME
(AV = +2V/V)
MAX4357 toc65
MAX4357 toc64
MEDIUM-SIGNAL PULSE RESPONSE
(AV = +2V/V)
OUTPUT
100mV/div
20ns/div
20ns/div
20ns/div
INPUT
50mV/div
INPUT
100mV/div
MAX4357 toc66
INPUT
1V/div
10M
MAX4357 toc63
FREQUENCY (Hz)
MAX4357 toc62
FREQUENCY (Hz)
MAX4357 toc61
100k
VOUT
1V/div
20ns/div
20ns/div
______________________________________________________________________________________
21
MAX4357
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)
OFFSET VOLTAGE DISTRIBUTION
MAX4357 toc68
MAX4357 toc67
300
MAX4357 toc69
SWITCHING TRANSIENT GLITCH
(AV = +1V/V)
250
VUPDATE
3V/div
VUPDATE
3V/div
200
150
100
VOUT
25mV/div
VOUT
25mV/div
50
0
-15 -13 -11 -9 -7
20ns/div
20ns/div
-5 -3 -1
1
3
5
OFFSET VOLTAGE (mV)
MAX4357 toc72
MAX4357 toc71
DIFFERENTIAL
GAIN (%)
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)
MAX4357 toc70
DIFFERENTIAL
GAIN (%)
DIFFERENTIAL GAIN AND PHASE
(RL = 150Ω)
0.15
0.05
INPUT
1V/div
DIFFERENTIAL
PHASE (°)
-0.05
DIFFERENTIAL
PHASE (°)
MAX4357
32 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
0.25
0.15
0.05
-0.05
0.25
0.15
0.05
-0.05
10
20 30 40 50 60 70 80 90 100
10
IRE
20 30 40 50 60 70 80 90 100
IRE
OUTPUT
1V/div
20ns/div
MEDIUM-SIGNAL PULSE RESPONSE
WITH CAPACITIVE LOAD
(CL = 30pF, AV = +2V/V)
MEDIUM-SIGNAL PULSE RESPONSE
WITH CAPACITIVE LOAD
(CL = 30pF, AV = +1V/V)
LARGE-SIGNAL PULSE RESPONSE
WITH CAPACITIVE LOAD
(CL = 30pF, AV = +2V/V)
MAX4357 toc75
MAX4357 toc74
MAX4357 toc73
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 I/O Buffers
RESET DELAY
vs. RESET CAPACITANCE
GAIN VS. TEMPERATURE
0.10
100m
RESET DELAY (s)
AV = +2V/V
0.05
0
-0.05
-0.10
MAX4357 toc77
0.15
NORMALIZED GAIN (dB)
10
1
MAX4357 toc76
0.20
10m
1m
100µ
10µ
1µ
AV = +1V/V
100n
-0.15
10n
-0.20
-50
-25
0
25
50
TEMPERATURE (°C)
75
100
1p
10p 100p 1n
10n 100n 1µ 10µ 100µ
CRESET (F)
______________________________________________________________________________________
23
MAX4357
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.)
-1
-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
-7
0.1
1
10
100
1000
0.1
LARGE-SIGNAL FREQUENCY
RESPONSE
MEDIUM-SIGNAL FREQUENCY
RESPONSE
SMALL-SIGNAL FREQUENCY
RESPONSE
-2
-3
-4
RL = 1kΩ
2
1
0
-1
-2
-3
-4
3
1
0
-1
-2
-3
-4
-5
-5
-6
-6
-6
-7
-7
10
100
1000
RL = 1kΩ
2
-5
1
1000
MAX4357 toc83
3
NORMALIZED GAIN (dB)
-1
-7
0.1
1
10
100
0.1
1000
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
-0.1
-0.4
FREQUENCY (MHz)
100
1000
CL = 15pF
-1
-0.2
10
CL = 45pF
1
0.1
1
CL = 30pF
2
NORMALIZED GAIN (dB)
0.4
NORMALIZED GAIN (dB)
0.7
RL = 1kΩ
0.5
3
MAX4357 toc85
0.6
MAX4357 toc84
0.8
MAX4357 toc86
FREQUENCY (MHz)
0.9
24
100
FREQUENCY (MHz)
0
0.1
10
FREQUENCY (MHz)
1
0.1
1
FREQUENCY (MHz)
RL = 1kΩ
2
1000
NORMALIZED GAIN (dB)
3
1
MAX4357 toc82
0.1
RL = 150Ω
2
NORMALIZED GAIN (dB)
NORMALIZED GAIN (dB)
1
MAX4357 toc81
NORMALIZED GAIN (dB)
0
RL = 150Ω
2
SMALL-SIGNAL FREQUENCY
RESPONSE
MAX4357 toc79
RL = 150Ω
1
NORMALIZED GAIN (dB)
3
MAX4357 toc78
3
2
MEDIUM-SIGNAL FREQUENCY
RESPONSE
MAX4357 toc80
LARGE-SIGNAL FREQUENCY
RESPONSE
NORMALIZED GAIN (dB)
MAX4357
32 x 16 Nonblocking Video Crosspoint Switch
with 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 I/O Buffers
5
CL = 30pF
4
3
-70
-75
-80
-40
-60
-70
-80
0
-95
-90
-1
-100
-100
10
100
100k
1000
1M
10M
100M
ENABLED OUTPUT IMPEDANCE
vs. FREQUENCY
DISABLED OUTPUT IMPEDANCE
vs. FREQUENCY
10k
1k
100
-60
-70
-80
-90
-100
-110
-120
1
100
-50
OFF ISOLATION (dB)
OUTPUT IMPEDANCE (Ω)
100k
0.1
10
100M
OFF-ISOLATION vs. FREQUENCY
10
1
10M
-40
MAX4357 toc91
MAX4357 toc90
1M
1
0.1
1000
1
10
100
100k
1000
1M
10M
100M
FREQUENCY (MHz)
FREQUENCY (MHz)
FREQUENCY (Hz)
POWER-SUPPLY
REJECTION RATIO vs. FREQUENCY
INPUT VOLTAGE NOISE
vs. FREQUENCY
LARGE-SIGNAL PULSE RESPONSE
MAX4357 toc93
-50
VOLTAGE NOISE (NV/√Hz)
-55
-60
-65
INPUT
1V/div
100
OUTPUT
1V/div
-70
-75
1G
MAX4357 toc95
1000
MAX4357 toc94
0.1
1M
FREQUENCY (Hz)
FREQUENCY (Hz)
10
100k
1G
FREQUENCY (MHz)
100
3rd HARMONIC
-50
-90
1
2nd HARMONIC
-30
-85
CL = 15pF
1000
OUTPUT IMPEDANCE (Ω)
-20
1
2
0.1
PSRR (dB)
-65
-10
MAX4357 toc92
6
-60
CROSSTALK (dB)
NORMALIZED GAIN (dB)
7
-55
DISTORTION (dBc)
CL = 45pF
0
MAX4357 toc88
8
DISTORTION vs. FREQUENCY
CROSSTALK vs. FREQUENCY
-50
MAX4357 toc87
9
MAX4357 toc89
MEDIUM-SIGNAL FREQUENCY RESPONSE
(AV = +1V/V)
10
10k
100k
1M
FREQUENCY (Hz)
10M
100M
10
100
1k
10k
100k
1M
10M
20ns/div
FREQUENCY (Hz)
______________________________________________________________________________________
25
MAX4357
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.)
MEDIUM-SIGNAL PULSE RESPONSE
SWITCHING TIME
MAX4357 toc97
MAX4357 toc96
VUPDATE
5V/div
INPUT
100mV/div
VOUT
500mV/div
OUTPUT
100mV/div
20ns/div
20ns/div
SWITCHING TRANSIENT (GLITCH)
OFFSET VOLTAGE HISTOGRAM
MAX4357 toc98
250
MAX4357 toc99
MAX4357
32 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
200
VUPDATE
5V/div
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)
MAX4357 toc100
0.25
0.20
DIFFERENTIAL 0.15
GAIN (%) 0.10
0.05
0
-0.05
0.04
DIFFERENTIAL 0.03
0.02
GAIN (%) 0.01
0
-0.01
0
10 20 30 40 50 60 70 80 90 100
0.30
0.25
0.20
DIFFERENTIAL 0.15
PHASE (%) 0.10
0
-0.05
-0.10
0
10 20 30 40 50 60 70
80 90 100
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
MAX4357 toc101
10
20 30 40 50 60 70 80 90 100
IRE
______________________________________________________________________________________
32 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
MEDIUM-SIGNAL PULSE RESPONSE WITH
CAPACITIVE LOAD (CL = 30pF)
LARGE-SIGNAL PULSE RESPONSE WITH
CAPACITIVE LOAD (CL = 30pF)
MAX4357 toc103
MAX4357 toc102
INPUT
1V/div
INPUT
100mV/div
INPUT
1V/div
OUTPUT
100mV/div
20ns/div
20ns/div
GAIN vs. TEMPERATURE
RESET DELAY
vs. RESET CAPACITANCE
10
1
RESET DELAY (s)
0.10
0.05
0
-0.05
MAX4357 toc105
0.15
NORMALIZED GAIN (dB)
100
MAX4357 toc104
0.20
100m
10m
1m
100µ
10µ
-0.10
1µ
-0.15
100n
10n
-0.20
-50
-25
0
25
50
TEMPERATURE (°C)
75
100
1p
10p 100p 1n
10n 100n 1µ 10µ 100µ
CRESET (F)
______________________________________________________________________________________
27
MAX4357
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.)
MAX4357
32 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
Pin Description
PIN
NAME
1, 69, 73, 77, 81, 85, 89, 93,
97
VEE
2, 4, 6, 8, 10, 12, 14, 16, 18,
20, 22, 24, 26, 28, 30, 32,
34, 36, 38, 40, 42, 44, 65,
66, 100, 102, 103, 104, 106,
108, 110, 112, 114, 116,
118, 120, 122, 124, 126,
128
3, 5, 7, 9, 11, 13, 15, 17, 19,
21, 23, 25, 27, 29, 31, 33,
37, 39, 41, 43, 105, 107,
109, 111, 113, 115, 117,
119, 121, 123, 125, 127,
AGND
IN0–IN31
FUNCTION
Negative Analog Supply. Bypass each pin with a 0.1µF capacitor to AGND.
Connect a single 10µF capacitor from one VEE pin to AGND.
Analog Ground
Buffered Analog Inputs
35, 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.
45
DGND
Digital Ground
46
AOUT
Address Recognition Output. AOUT drives low after successful chip address
recognition.
47–50
A3–A0
Address Programming Inputs. Connect to DGND or VDD to select the address for
Individual Output Address Mode (Table 3).
51
DOUT
Serial Data Output. In Complete Matrix Mode, data is clocked through the 112-bit
Matrix Control Shift register. In Individual Output Address Mode, data at DIN
passes directly to DOUT.
52
SCLK
Serial Clock Input
53
CE
Clock Enable Input. Drive low to enable the serial data interface.
MODE
Serial Interface Mode Select Input. Drive high for Complete Matrix Mode (Mode
1), or drive low for Individual Output Address Mode (Mode 0).
55
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.
56
UPDATE
57
DIN
58–63, 101
N.C.
No Connection. Not internally connected. Connect to AGND.
64
VDD
Digital Logic Supply. Bypass VDD with a 0.1µF capacitor DGND.
68, 70, 72, 74, 76, 78, 80,
82, 84, 86, 88, 90, 92, 94,
96, 98
OUT0–OUT15
54
28
Update Input. Drive UPDATE low to transfer data from mode registers to the
matrix switch.
Serial Data Input. Data is clocked in on the falling edge of SCLK.
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.
______________________________________________________________________________________
32 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
MAX4357
AV*
IN1
AV *
32 x 16
SWITCH MATRIX
IN2
AV *
IN31
AV *
RESET
POWER-ON
RESET
THERMAL
SHUTDOWN
DISABLE ALL OUTPUTS
512 16
OUT0
ENABLE/DISABLE
IN0
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 MAX4357 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 MAX4357 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 in the sections following.
Analog Outputs
The MAX4357 outputs are high-speed amplifiers capable of driving 150Ω (75Ω back-terminated) loads. The
gain, AV = +1V/V or +2V/V, is selectable through 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 through 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 MAX4357 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 highimpedance state.
______________________________________________________________________________________
29
MAX4357
Functional Diagram
MAX4357
32 x 16 Nonblocking Video Crosspoint Switch
with 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.
0
1
↓
Di
Di-112
1
1
1
Data at DIN is clocked on negative edge of
SCLK into 112-bit Complete Matrix Mode
register. DOUT supplies original data in
112 SCLK pulses later.
0
0
X
X
X
1
1
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
1
↓
Di
Di
0
1
OPERATION/COMMENTS
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
The MAX4357 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.
Switch Matrix
The MAX4357 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.
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.
30
SCLK is the serial-data clock that 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 MAX4357 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
______________________________________________________________________________________
32 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
MAX4357
A0–A3 4
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
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 through 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).
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 MAX4357s, all the devices can be
programmed by sending a single bit stream equal to n
x 112 bits where n is the number of MAX4357 devices
on the bus. The first 112-bit data word programs the
last MAX4357 in line (see Matrix Programming section).
RESET
The MAX4357 features an asynchronous bidirectional
RESET with an internal 20kΩ pullup resistor to VDD.
When RESET is pulled low either by internal circuitry, or
______________________________________________________________________________________
31
MAX4357
32 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
Table 2. 16-Bit Serial Control Word Bit Assignments (Mode 0: Individual Output
Address Mode)
BIT
NAME
15 (MSB)
X
FUNCTION
14
IC Address A3
MSB of selected chip address
13
IC Address A2
MSB of selected chip address
12
IC Address A1
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
MSB of output buffer address
8
Output Address B1
MSB of output buffer address
7
Output Address B0
LSB of output buffer address
6
Output Enable
Don’t care
Enable bit for output, 0 = disable, 1 = enable
5
Gain Set
4
Input Address 4
MSB of input channel select address
Gain select for output buffer, 0 = gain of +1V/V, 1 = gain of +2V/V
3
Input Address 3
MSB of input channel select address
2
Input Address 2
MSB of input channel select address
1
Input Address 1
MSB of input channel select address
0 (LSB)
Input Address 0
LSB of input channel select address
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.
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 power-on
reset comparator pulls RESET low through internal circuitry. As the digital-supply voltage ramps up crossing
2.5V, the MAX4357 holds RESET low for 40ns (typ).
Connecting a small capacitor from RESET to DGND
extends the power-on reset delay (see the RESET
Delay vs. RESET Capacitance graph in the Typical
Operating Characteristics).
32
Thermal Shutdown
The MAX4357 features thermal shutdown protection
with temperature hysteresis. When the die temperature
exceeds +150°C, the MAX4357 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 MAX4357 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 eight
MAX4357 crosspoint devices.
______________________________________________________________________________________
32 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
MAX4357
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
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
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
crosspoint devices to reduce the number of outputs
that need to be wired together (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 Optimal Isolation Resistor vs.
Capacitive Load graph. A lowpass filter is created from
the series resistor and parasitic capacitance to ground.
A single R-C does not affect the performance at video
______________________________________________________________________________________
33
MAX4357
32 x 16 Nonblocking Video Crosspoint Switch
with 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 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
MAX4357
Table 3. Chip Address Programming for 16-Bit Control Word (Mode 0: Individual Output
Address Mode)
MAX4357
32 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
Table 5. Output Selection Programming
OUTPUT ADDRESS BIT
INPUTS
(0–31)
INPUTS
(32–63)
INPUTS
(64–95)
INPUTS
(96–127)
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
32
16
IN MAX4357 OUT
32
16
IN MAX4357 OUT
32
16
IN MAX4357 OUT
32
16
IN MAX4357 OUT
32
16
MAX4357
IN
OUT
32
16
MAX4357
IN
OUT
32
16
IN MAX4357 OUT
OUTPUTS (0–15)
32
16
IN MAX4357 OUT
OUTPUTS (16–31)
Figure 6. 128 x 32 Nonblocking Matrix Using 32 x 16
Crosspoint Devices
36
SELECTED OUTPUT
B3 (MSB)
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 small-value inductor
to the output.
Crosstalk and Board Routing Issues
Improper signal routing causes performance problems.
The MAX4357 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 I/O Buffers
INPUTS (0–31)
32
16
MAX4357 OUT
IN
INPUTS (32–63)
32
16
MAX4357 OUT
IN
INPUTS (64–95)
32
IN
16
MAX4357 OUT
INPUTS (96–127)
32
INPUT ADDRESS BIT
16
IN
16
IN
16 OUTPUTS (0–15)
MAX4357 OUT
16
MAX4357 OUT
IN
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
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 dissipates 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 MAX4357 achieves a -110dB isolation at 6MHz by
selecting the pinout configuration such that the inputs
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
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.
______________________________________________________________________________________
37
MAX4357
Table 6. Input Selection Programming
MAX4357
32 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
Table 7. 7-Bit Serial Control Word Bit Assignments (Mode 1: Complete Matrix Mode
Programming)
BIT
NAME
FUNCTION
6 (MSB)
Output Enable
5
Gain Set
4
Input Address 4
MSB of input channel select address
3
Input Address 3
MSB of input channel select address
2
Input Address 2
MSB of input channel select address
1
Input Address 1
MSB of input channel select address
0 (LSB)
Input Address 0
LSB of input channel select address
Enable bit for output, 0 = disable, 1 = enable.
Gain select for output buffer, 0 = gain of +1V/V, 1 = gain of +2V/V.
Power-Supply Bypassing
The MAX4357 operates from a single +5V or dual ±3V
to ±5V supply. 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 MAX4357 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
MAX4357 consumes 220mW (0.43mW/point).
Driving a PC Board Interconnect or Cable
(AV = +1V/V or +2V/V)
The MAX4357 output buffers can be programmed to
either AV = +1V/V or +2V/V. The +1V/V configuration is
typically used when driving short-length (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 voltagedivider 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 back-match,
reverse termination, or series termination. This 75Ω
resistor reduces reflections and provides isolation,
increasing the output-capacitive-driving capability.
Matrix Programming
The MAX4357’s unique digital interface simplifies programming multiple MAX4357 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 9). Two distinct programming modes,
38
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 datarouting 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
communicates with the device by sending a 16-bit
word consisting of 1 don’t-care bit, 4-chip address bits,
and 11 bits of data to make the word exactly 2 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 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 ✕ 112 bits are sent to
program the entire matrix, where n = the number of
MAX4357 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
______________________________________________________________________________________
32 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
DIN
HOST
CONTROLLER
DOUT
MAX4357
A3
SCLK
CHIP ADDRESS = 1
DIN
CHIP ADDRESS = 2
DOUT
DIN
MAX4357
A3
SCLK
CE
A2
CE
A2
MODE
A1
MODE
UPDATE
A0
UPDATE
MAX4357
CHIP ADDRESS = 0
DOUT
MAX4357
A3
SCLK
CE
A2
A1
MODE
A1
A0
UPDATE
A0
VDD
NEXT DEVICE
VDD
VIRTUAL SERIAL BUS (MODE 0: INDIVIDUAL OUTPUT ADDRESS MODE)
Figure 9. Matrix Mode Programming
programmed in series times 112 bits per crosspoint
device. This programming method is most often used
at startup to initially configure the switching matrix.
Operating at +5V Single-Supply with
AV = +1V/V or +2V/V
The MAX4357 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 MAX4357
crosspoint switch with Maxim’s low-cost, high-performance video amplifiers optimized for single +5V supply
operation (Figure 10). 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
package. The MAX4383 is a quad op amp available in
a 14-pin TSSOP package. The MAX4380/MAX4381/
MAX4382/MAX4384 offer individual high-impedance
output disable, making these amplifiers suitable for
wired-OR connections.
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
______________________________________________________________________________________
39
MAX4357
32 x 16 Nonblocking Video Crosspoint Switch
with 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
MAX4357
AGND
U2 = MAX4450
OR 1/4 MAX4383
VEE
Figure 10. Typical Single +5V Supply Application
Chip Information
TRANSISTOR COUNT: 39,133
PROCESS: BiCMOS
40
______________________________________________________________________________________
32 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
103 AGND
104 AGND
105 IN0
106 AGND
107 IN1
109 IN2
108 AGND
110 AGND
111 IN3
112 AGND
113 IN4
114 AGND
115 IN5
116 AGND
117 IN6
118 AGND
119 IN7
120 AGND
121 IN8
122 AGND
123 IN9
124 AGND
125 IN10
126 AGND
127 IN11
128 AGND
TOP VIEW
VEE
1
102 AGND
AGND
2
101 N.C.
IN12
3
100 AGND
AGND
4
99 VCC
IN13
5
98 OUT0
AGND
6
97 VEE
IN14
7
96 OUT1
AGND
8
95 VCC
IN15
9
94 OUT2
AGND 10
93 VEE
IN16 11
92 OUT3
AGND 12
91 VCC
IN17 13
90 OUT4
89 VEE
AGND 14
IN18 15
88 OUT5
AGND 16
87 VCC
IN19 17
86 OUT6
AGND 18
85 VEE
MAX4357
IN20 19
84 OUT7
AGND 20
83 VCC
IN21 21
82 OUT8
AGND 22
81 VEE
IN22 23
80 OUT9
AGND 24
79 VCC
IN23 25
78 OUT10
AGND 26
77 VEE
IN24 27
76 OUT11
AGND 28
75 VCC
IN25 29
74 OUT12
73 VEE
AGND 30
IN26 31
72
OUT13
AGND 32
71
VCC
IN27 33
70
OUT14
AGND 34
69
VEE
VCC 35
68
OUT15
AGND 36
67
VCC
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
AGND
IN31
AGND
DGND
AOUT
A3
A2
A1
A0
DOUT
SLCK
CE
MODE
RESET
UPDATE
DIN
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
VDD
AGND
41
65
IN30
38
40
AGND
AGND
39
66
IN29
37
AGND
IN28
______________________________________________________________________________________
41
MAX4357
Pin Configuration
32 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
TQFP14x20x1.4mm.EPS
MAX4357
Package Information
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.
42 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2001 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.

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