5V, 4:1, 2-channel, analog mux, injection current control, 1.8V compatible logic

The TMUX1308A

and TMUX1309A are general purpose complementary metal-oxide

semiconductor (CMOS) multiplexers (MUX). The TMUX1308A is an 8:1, 1-channel (single-ended) mux, while the TMUX1309A is a 4:1, 2-channel

(differential) mux. The devices support bidirectional analog and digital signals on

the source (Sx) and drain (Dx) pins ranging from GND to VDD.

The TMUX13xxA devices have

an internal injection current control feature, which eliminates the need for

external diode and resistor networks (typically used to protect the switch and keep

the input signals within the supply voltage.) The internal injection current control

circuitry allows signals on disabled or enabled signal paths to exceed the supply

voltage. Disabled channels with voltages above VDD are prevented from

affecting the signal of the enabled signal path. The TMUX13xxA devices do

not have an internal diode path to the supply pin, which eliminates the risk of

damaging components connected to the supply pin or providing unintended power to the

supply rail.

All logic inputs have 1.8V logic compatible thresholds, allowing for both TTL and CMOS logic

compatibility when operating with a valid supply voltage. Fail-Safe Logic circuitry allows voltages on the control pins to be

applied before the supply pin, protecting the device from potential damage.