MAX4588
Low-Voltage, High-Isolation,
Dual 4-Channel RF/Video Multiplexer
10 ______________________________________________________________________________________
Pin Description
Active-Low Reset Input. In serial mode, drive RS low to force the latches and shift registers to the power-
on reset state and force all switches open. In parallel mode, drive RS low to force the latches to the power-
on reset state and force all switches open. See
Truth Tables
.
RS
12
In parallel mode, this pin is the transparent Latch Enable. In the serial mode, this pin is the Chip-Select
Input. See
Truth Tables.
LE/CS
13
Most Significant Address Bit in parallel mode with 4/8 low. If 4/8 pin is high, this pin is ignored. In the serial
mode, this is the Serial Shift Clock Input. Data is loaded on the rising edge of SCLK. See
Truth Tables
.
A2/SCLK14
Address Input in the parallel mode. Serial Data Input in serial mode. In serial mode, data is loaded on
SCLK’s rising edge.
A1/DIN15
Least Significant Address Input in the parallel mode. In the serial mode this is an output from the internal
4-bit shift register. DOUT is intended for daisy-chain cascading. DOUT is not three-stated by CS. See
Serial Operation
.
A0/DOUT16
Normally Open Analog Input Terminal. See
Truth Tables.
NO26
Normally Open Analog Input Terminal. See
Truth Tables.
NO38
Normally Open Analog Input Terminal. See
Truth Tables.
NO410
Multiplexer Configuration Control. Connect to V
L
to select dual 2-channel mode. Connect to GND for single
4-channel multiplexer operation. See
Truth Tables
.
4/8
11
Normally Open Analog Input Terminal. See
Truth Tables.
NO14
Analog Positive Supply Voltage InputV+3
PIN
Analog Switch Common Terminal. See
Truth Table.
COM12
Ground. Connect all ground pins to a ground plane. See
Grounding
section.GND
1, 5, 7,
9, 21,
23, 25
FUNCTIONNAME
Normally Open Analog Input Terminal. See
Truth Tables
.NO526
Analog Negative Supply Voltage Input. Connect to ground plane for single-supply operation.V-27
Analog Switch Common Terminal. See
Truth Tables
.COM228
Logic Supply Input. Powers the DOUT driver and other digital circuitry. V
L
sets both the digital input and
output logic levels.
V
L
19
Normally Open Analog Input Terminal. See
Truth Tables
.NO820
Normally Open Analog Input Terminal. See
Truth Tables
.NO722
Normally Open Analog Input Terminal. See
Truth Tables
.NO624
Interface Select Input. Drive low for parallel data interface operation. Drive high for serial data interface
operation and to enable the DOUT driver.
SER/PAR
18
Switch Enable. Drive EN low to force all channels off. Drive high to allow normal multiplexer operation.
Operates asynchronously in serial mode. In parallel mode, EN is latched when LE signal is high.
EN17
