MAX4358ECE MAXIM [Maxim Integrated Products], MAX4358ECE Datasheet - Page 29

• Manufacturer Part Number: MAX4358ECE
• Description: 32 x 16 Nonblocking Video Crosspoint Switch with On-Screen Display Insertion and I/O Buffers
• Manufacturer: MAXIM [Maxim Integrated Products]

The MAX4358 is a highly integrated 32
ing video crosspoint switch matrix . All inputs and out-
puts are buffered, with all outputs able to drive
standard 75 reverse-terminated video loads.
A three-wire interface programs the switch matrix and
initializes with a single update signal. The unique serial
interface operates in one of two modes, Complete
Matrix Mode (Mode 1) or Individual Output Address
Mode (Mode 0).
The signal path of the MAX4358 is from the buffered
inputs (IN0–IN31), through the switching matrix,
buffered by the output amplifiers, and presented at the
outputs (OUT0–OUT15) (Functional Diagram). The
other functional blocks are the serial interface and con-
trol logic. Each of the functional blocks is described in
detail below.
with On-Screen Display Insertion and I/O Buffers
32 x 16 Nonblocking Video Crosspoint Switch
RESET
UPDATE
______________________________________________________________________________________
SCLK
IN31
DIN
IN0
IN1
IN2
CE
Detailed Description
POWER-ON
MAX4358
A0-A3 MODE
RESET
INTERFACE
SERIAL
DISABLE ALL OUTPUTS
SHUTDOWN
THERMAL
16 nonblock-
UPDATE REGISTER
SWITCH MATRIX
MATRIX REGISTER
DECODE LOGIC
LATCHES
32 x 16
112 BITS
16 BITS
512 16
OSDFILL0
OSDKEY0
The MAX4358 outputs are high-speed amplifiers capa-
ble of driving 150
gain, A
ming bit 5 of the serial control word. Amplifier compen-
sation is automatically optimized to maximize the
bandwidth for each gain selection. Each output can be
individually enabled and disabled via bit 6 of the serial
control word. When disabled, the output is high imped-
ance presenting typically 4k
capacitance, allowing multiple outputs to be connected
together for building large arrays. On power-up (or
asynchronous RESET) all outputs are initialized in the
disabled state to avoid output conflicts in large array
configurations. The programming and operation of the
MAX4358 is output referred. Outputs are configured
individually to connect to any one of the 32 analog
inputs, programmed to the desired gain (A
+2V/V), and enabled or disabled in a high-impedance
state.
OSDFILL1
OSDKEY1
MUX
OSD
2:1
OSDFILL15
OSDKEY15
V
= +1V/V or +2V/V, is selectable via program-
16
*A
A
A
A
A
V
V
V
V
V
= +1V/V OR +2V/V
*
*
*
*
(75
Functional Diagram
back-terminated) loads. The
OUT0
OUT1
OUT2
OUT15
V
V
AGND
DGND
DOUT
AOUT
load, and 3pF output
V
CC
EE
DD
Analog Outputs
V
= +1V/V or
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