MAX4358 Datasheet, PDF (1/43 Pages) Maxim Integrated Products – 32 x 16 Nonblocking Video Crosspoint Switch with On-Screen Display Insertion and I/O Buffers

19-2111; Rev 0; 8/01
32 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
General Description
The MAX4358 is a 32 ✕ 16 highly integrated video
crosspoint switch matrix with input and output buffers
and On-Screen Display (OSD) Insertion. This device
operates from dual ±3V to ±5V supplies or from a sin-
gle +5V supply. Digital logic is supplied from an inde-
pendent single +2.7V to +5.5V supply. Individual
outputs can be switched between an input video signal
source and OSD information through an internal, dedi-
cated fast 2:1 mux (40ns switching times) located
before the output buffer. All inputs and outputs are
buffered, with all outputs able to drive standard 75Ω
reverse-terminated video loads.
The switch matrix configuration and output buffer gain
are programmed through an SPI/QSPI™-compatible,
three-wire serial interface and initialized with a single
update signal. The unique serial interface operates in
two modes facilitating both fast updates and 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 MAX4358 is available in a 144-pin TQFP package
and specified over an extended -40°C to +85°C tem-
perature range. The MAX4358 evaluation kit is available
to speed designs.
Applications
Security Systems
Video Routing
Video-On-Demand Systems
Typical Operating Circuit
CAMERAS
IN0
IN1
OUT0
IN31
OSDFILL0
OSDKEY0
OSDFILL1
OSDKEY1
MAX4358
OUT1
OUT15
OSDFILL15
OSDKEY15
MONITOR
MONITOR
MONITOR
Features
o 32 ✕ 16 Nonblocking Matrix with Buffered Inputs
and Outputs
o Operates from a ±3V, ±5V, or +5V Supply
o Fast Switching (40ns) 2:1 OSD Insertion Mux
o Each Output Individually Addressable
o Individually Programmable Output Buffer Gain
(A_V = +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 195mW Power Consumption (0.38mW per
point)
Ordering Information
PART
MAX4358ECE
TEMP RANGE
-40°C to +85°C
PIN PACKAGE
144 TQFP
Pin Configuration appears at end of data sheet.
Functional Diagram
OSDFILL1
OSDFILL0 OSDFILL15
IN0
IN1
IN2
IN31
RESET
DIN
SCLK
UPDATE
CE
MAX4358
AV*
OUT0
32 x 16
SWITCH MATRIX
2:1
AV*
OSD
MUX
AV*
OUT1
OUT2
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*
16
OSDKEY0 OSDKEY15
OSDKEY1
*AV = +1V/V OR +2V/V
OUT15
VCC
VEE
AGND
VDD
DGND
DOUT
AOUT
SPI/QSPI are trademarks of Motorola, Inc.
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