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
• Low capacitance
• Bidirectional signal path
• Rail-to-rail operation
• 1.8V logic compatible
• Fail-safe logic
• Break-before-make switching
• Short-to-Battery Protection
• Functional Safety-Capable
– Documentation Available to Aid Functional
Safety System Design
• TMUX1308-Q1 – pin compatible with:
– Industry standard 4051 and 4851 multiplexers
• TMUX1309-Q1 – pin compatible with:
– Industry standard 4052 and 4852 multiplexers

2 Applications
• Analog and digital multiplexing and demultiplexing
• Diagnostics and monitoring
• Robotics
• 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 TMUX1308-Q1 and TMUX1309-Q1 are general
purpose complementary metal-oxide semiconductor
(CMOS) multiplexers (MUX). The TMUX1308-Q1 is
an 8:1, 1-channel (single-ended) mux, while the
TMUX1309-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 TMUX13xx-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 signal
paths to exceed the supply voltage without affecting
the signal of the enabled signal path. Additionally, the
TMUX13xx-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.
All logic inputs have 1.8V logic compatible thresholds,
ensuring 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.