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.