TI TCA9539QPWRQ1

The TCA9539-Q1 is a 24-pin device that provides 16-bit general-purpose parallel I/O expansion for a 2-wire bidirectional I2C bus (or SMBus protocol). The device operates over a VCC range of 1.65V to 3.6V and supports clock frequencies of 100kHz (I2C standard mode) and 400kHz (I2C fast mode). When switches, sensors, buttons, LEDs, fans, and other similar devices require additional I/O, I/O expanders such as the TCA9539-Q1 provide a simple solution. The TCA9539-Q1 includes a feature that generates an interrupt on the INT pin when the state of an input port changes. Hardware-selectable address pins A0 and A1 allow up to four TCA9539-Q1 devices to reside on the same I2C bus. The device can also be reset to its default state via a power-on reset generated by power cycling. In addition, the TCA9539-Q1 features a hardware RESET pin that can be used to reset the device to its default state. The TCA9539-Q1 I2C I/O expander meets the requirements of automotive applications.

• AEC-Q100 (Grade 1): compliant with automotive application requirements
• Functional safety support
• Documentation to assist functional safety system design
• I2C to parallel port expander
• Open-drain active-low interrupt output
• Active-low reset input
• 5V tolerant input and output ports
• Compatible with most microcontrollers
• 400kHz Fast-mode I2C bus
• Polarity inversion register
• Internal power-on reset
• No glitch on power-up
• Addressable via two hardware address pins for up to 4 devices
• Latched outputs for direct LED drive
• Latch-up performance exceeds 100mA per JESD78 Class II
• ESD protection exceeds JESD22 specification requirements
• 2000V Human Body Model (A114-A)
• 1000V Charged Device Model (C101)

• Automotive infotainment, ADAS, body electronics, HEV, EV, and powertrain
• Industrial automation, factory automation, building automation, test & measurement, EPOS
• I2C GPIO expansion