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 power-supply voltage range of 1.08 V to

3.6 V

• Low standby current consumption of 1 μA typical

at 1.8 V

• 1-MHz fast mode plus I2C bus

• Hardware address pin allows two devices on the

same I2C, SMBus bus

• Active-low reset input (RESET )

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

• Input or output configuration register

• Polarity inversion register

• Configurable I/O drive strength register

• Pull-up and pull-down resistor configuration

register

• Internal power-on reset

• Noise filter on SCL or SDA inputs

• Latched outputs with high-current drive maximum

capability for directly driving LEDs

• Latch-up performance exceeds 100 mA per AEC

Q100-004

• ESD protection exceeds AEC - Q100 requirements

– 4000-V Human-body model (AEC - Q100-002)

– 1000-V Charged-device model (AEC -

Q100-011)

2 Applications

• Automotive infotainment and cluster

• Body electronics and lighting

• Hybrid, electric and powertrain systems

• Industrial transportation

• Products with GPIO-limited processors

3 Description

The TCAL9539-Q1 device provides general purpose

parallel input/output (I/O) expansion for the two-line

bidirectional I2C bus (or SMBus) protocol and is

designed for 1.08-V to 3.6-V VCC operation.

The device supports 100-kHz (Standard-mode),

400-kHz (Fast-mode), and 1-MHz (fast-mode-plus)

I2C clock frequencies. I/O expanders such as

the TCAL9539-Q1 provide a simple solution when

additional I/Os are needed for switches, sensors,

push-buttons, LEDs, fans, and so on.

The TCAL9539-Q1 has Agile I/O ports which include

additional features designed to enhance the I/O

performance in terms of speed, power consumption

and EMI. The additional features are: programmable

output drive strength, programmable pull-up and pulldown

resistors, latchable inputs, maskable interrupt,

interrupt status register, and programmable opendrain

or push-pull outputs.