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PDF MAX4357 Data sheet ( Hoja de datos )
| Número de pieza | MAX4357 | |
| Descripción | 32 X 16 Nonblocking Video Crosspoint Switch | |
| Fabricantes | Maxim Integrated Products | |
| Logotipo |  |
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19-2209; Rev 0; 10/01
www.DataSheet4U.com
32 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
General Description
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 initializa-
tion. On power-up, all outputs are initialized in the dis-
abled 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-on-
demand systems.
The MAX4357 is available in a 128-pin TQFP package
and specified over an extended -40°C to +85°C tem-
perature range.
Applications
Security Systems
Video Routing
Video-On-Demand Systems
Features
o 32 ✕ 16 Nonblocking Matrix with Buffered Inputs
and Outputs
o Operates from a ±3V, ±5V, or +5V Supply
o Each Output Individually Addressable
o Individually Programmable Output Buffer Gain
(AV = +1V/V or +2V/V)
o High-Impedance Output Disable for Wired-OR
Connections
o 0.1dB Gain Flatness to 12MHz
o Minimum -62dB Crosstalk, -110dB Isolation at
6MHz
o 0.05%/0.1° Differential Gain/Differential Phase
Error
o Low 220mW Power Consumption (0.43mW per
Point)
Ordering Information
PART
TEMP. RANGE PIN-PACKAGE
MAX4357ECD
-40°C to +85°C 128 TQFP
Pin Configuration appears at end of data sheet.
Functional Diagram
Typical Operating Circuit
CAMERAS
IN0 OUT0
IN1
MAX4357
OUT1
IN31 OUT15
MONITOR
MONITOR
MONITOR
IN0
IN1
IN2
IN31
RESET
DIN
SCLK
UPDATE
CE
MAX4357
32 x 16
SWITCH MATRIX
POWER-ON THERMAL
RESET
SHUTDOWN
DISABLE ALL OUTPUTS
512 16
DECODE LOGIC
SERIAL
INTERFACE
LATCHES
MATRIX REGISTER
112 BITS
UPDATE REGISTER
16 BITS
A0-A3 MODE
AV* OUT0
AV* OUT1
AV* OUT2
AV* OUT15
16
VCC
VEE
AGND
VDD
DGND
DOUT
AOUT
*AV = +1V/V OR +2V/V
SPI/QSPI are trademarks of Motorola, Inc.
________________________________________________________________ Maxim Integrated Products 1
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 page  
www.DataSheet4U.com
32 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
DC ELECTRICAL CHARACTERISTICS—DUAL SUPPLIES ±3V (continued)
(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
Output Short-Circuit Current
Enabled Output Impedance
Output Leakage Current,
Disable Mode
DC Power-Supply Rejection
Ratio
Quiescent Supply Current
SYMBOL
ISC
ZOUT
IOD
CONDITIONS
Sinking or sourcing, RL = 1Ω
(VEE + 1V) < VIN_ < (VCC - 1.2V)
(VEE + 1V) < VOUT_ < (VCC - 1.2V)
PSRR
ICC
IEE
4.5V < (VCC - VEE) < 10.5V
RL = ∞
RL = ∞
Outputs enabled
Outputs disabled
Outputs enabled
Outputs disabled
MIN TYP MAX UNITS
±40 mA
0.2 Ω
0.004
1
µA
60 75
90
45
85
40
dB
mA
IDD 3
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
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
Operating Supply Voltage
Range
VCC Guaranteed by PSRR test
4.5 5.5 V
Logic-Supply Voltage Range
VDD to
DGND
2.7 5.5 V
Gain (Note 1)
Gain Matching (Channel to
Channel)
Temperature Coefficient of Gain
Input Voltage Range
AV
TCAV
VIN
(VEE + 1V) < VIN < (VCC - 2.5V),
AV = +1V/V, RL = 150Ω
(VEE + 1V) < VIN < (VCC - 1.2V),
AV = +1V/V, RL = 10kΩ
RL = 10kΩ
RL = 150Ω
AV = +1V/V
RL = 10kΩ
RL = 150Ω
0.94
0.94
VEE +
1
VEE +
1
0.995
0.995
0.5
0.5
10
1
V
1
3
3
VCC -
1.2
VCC -
2.5
%
ppm/°C
V
Output Voltage Range
VOUT
AV = +1V/V,
RL = 10kΩ
AV = +1V/V,
RL = 150Ω
VEE +
1
VEE +
1
VCC -
1.2
VCC -
2.5
V
_______________________________________________________________________________________ 5
5 Page 
www.DataSheet4U.com
32 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
SWITCHING CHARACTERISTICS
((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 sup-
ply, RL = 150Ω to AGND, CL = 100pF, AV = +1V/V, and TA = TMIN - TMAX, unless otherwise noted. Typical values are at TA = +25°C. )
PARAMETER
Delay: UPDATE to Video Out
Delay: UPDATE to AOUT
SYMBOL
tPdUdVo
tPdUdAo
CONDITIONS
VIN = 0.5V step
MODE = 0, time to AOUT = low after
UPDATE = low
MIN TYP MAX UNITS
200 450
ns
30 200 ns
Delay: SCLK to DOUT Valid
Delay: Output Disable
Delay: Output Enable
Setup: CE to SCLK
Setup: DIN to SCLK
Hold Time: SCLK to DIN
Minimum High Time: SCLK
Minimum Low Time: SCLK
Minimum Low Time: UPDATE
Setup Time: UPDATE to SCLK
tPdDo
tPdHOeVo
tPdLOeVo
tSuCe
tSuDi
tHdDi
tMnHCk
tMnLCk
tMnLUd
tSuHUd
Logic state change in DOUT on active
SCLK edge
VOUT = 0.5V, 1kΩ pulldown to AGND
Output disabled, 1kΩ pulldown to AGND,
VIN = 0.5V
Rising edge of UPDATE to falling edge of
SCLK
30 200
300 800
200 800
100
100
100
100
100
100
100
ns
ns
ns
ns
ns
ns
ns
ns
ns
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
Minimum Low Time: RESET
Delay: RESET
tHdMd
tMnLRst
tPdRst
Minimum time from clock edge to MODE
with valid data clocking
10kΩ pulldown to AGND
100
ns
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 updat-
ing 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
11 Page | ||
| Páginas | Total 42 Páginas | |
| PDF Descargar | [ Datasheet MAX4357.PDF ] | |
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