1 Features

• Standard 126-type pinout

• 5-Ω switch connection between two ports

• Rail-to-rail switching on data I/O ports

• Ioff supports partial-power-down mode operation

• Latch-up performance exceeds 100 mA per JESD

78, Class II

2 Applications

• Analog and digital multiplexing and demultiplexing

• Diagnostics and monitoring

• Zonal Architecture

• Body control modules

• Battery management systems (BMS)

• HVAC control module

• ADAS

• On-board (OBC) and wireless charging

• Automotive head unit

• Telematics

3 Description

The SN74CBTLV3126-Q1 quadruple FET bus switch

features independent line switches. Each switch is

disabled when the associated output-enable (OE)

input is low.

This device is fully specified for partial-power-down

applications using Ioff. The Ioff feature ensures that

damaging current will not backflow through the device

when it is powered down. The SN74CBTLV3126-Q1

device has isolation during power off.

To ensure the high-impedance state during power up

or power down, OE should be tied to GND through a

pull down resistor; the minimum value of the resistor

is determined by the current-sinking capability of the

driver.