1 Features

• AEC-Q100 qualified for automotive applications

– Device Temperature Grade 1: –40°C to 125°C

ambient operating temperature

• Injection current control

• Back-powering protection

– No ESD diode path to VDD

• Wide supply range: 1.62V to 5.5V

• Fast settling times

• Low ON-capacitance

• Bidirectional signal path

• Optimized for high-impedance loads

• Rail-to-rail operation

• 1.8V logic compatible

• Fail-safe logic

• Break-before-make switching

• Short-to-battery protection for ON and OFF

channels

• Functional safety-capable

– Documentation available to aid functional safety

system design

• TMUX1308A-Q1 – pin compatible with:

– Industry standard 4051, 4851 and 1308

multiplexers

• TMUX1309A-Q1 – pin compatible with:

– Industry standard 4052, 4852 and 1309

multiplexers

2 Applications

• Analog and digital multiplexing and demultiplexing

• Diagnostics and monitoring

• Zonal architecture

• Body control modules

• Battery management systems (BMS)

• HVAC control module

• Automotive head unit

• Telematics

• On-board (OBC) and wireless charging

3 Description

The TMUX1308A-Q1 and TMUX1309A-Q1 are

general purpose complementary metal-oxide

semiconductor (CMOS) multiplexers (MUX). The

TMUX1308A-Q1 is an 8:1, 1-channel (single-ended)

mux, while the TMUX1309A-Q1 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-Q1 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. Additionally, the TMUX13xxA-Q1 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. Due to these features RC

networks on the input side can be reduced- allowing

for a much smaller current limiting resistor which can

have a significant impact on the ramp rates.

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.