1 Features

• AEC-Q100 qualified for automotive applications:

– Temperature grade 1: –40°C to +125°C, TA

• Functional safety-capable

– Documentation available to aid in functional

safety system design

• Operating supply voltage range of 1.65V to 5.5V

• Low standby current consumption of 2.3μA typical

• SPI SCLK Frequency

– 10MHz from 3.3V to 5.5V

– 5MHz from 1.65V to 5.5V

• Active-low reset input (RESET)

• 5V tolerant input and output ports

• Buit-in fail-safe I/O feature

• Open-drain active-low interrupt output (INT)

• Individual I/O control and the glitch filter supported

on all inputs of the GPIOs

• SPI daisy-chain supported

• I/O reading burst mode supported

• I/O polarity inversion supported

• Bus-hold feature to maintain the last I/O state

• Latched outputs with high-current drive capability

for directly driving LEDs

• Latch-up performance exceeds 100mA per AEC

Q100-004

• ESD protection exceeds AEC - Q100 requirements

– 2000V Human-body model (AEC - Q100-002)

– 1000V Charged-device model (AEC -

Q100-011)

2 Applications

• Automotive infotainment and cluster

• Body electronics and lighting

• Hybrid, electric and powertrain systems

• Products with GPIO-limited processors

3 Description

The TXE81XX-Q1 devices provide general purpose

parallel input/output (I/O) expansion for the four

wire Serial Peripheral Interface (SPI) protocol and is

designed for 1.65V to 5.5V VCC operation.

The device supports 10MHz from 3.3V to 5.5V and

5MHz from 1.65V to 5.5V. I/O expanders, such as

the TXE81XX-Q1, provide a simple solution when

additional I/Os are needed for switches, sensors,

push-buttons, LEDs, and fans.

The TXE81XX-Q1 devices have I/O ports, which

include additional features designed to enhance

the I/O performance in terms of speed, power

consumption, and flexibility. The additional features

are: enable/disable pull-up and pull-down resistors,

latchable inputs, maskable interrupt, interrupt status

register, programmable open-drain or push-pull

outputs, and a fail-safe register mode which is

enabled by the FAIL-SAFE pin.