TCA9538 Series

8-bit 1.65- to 5.5-V I2C/SMBus I/O expander with interrupt, reset & config registers

Catalog

8-bit 1.65- to 5.5-V I2C/SMBus I/O expander with interrupt, reset & config registers

Part	Supplier Device Package	Operating Temperature [Max]	Operating Temperature [Min]	Package / Case [x]	Package / Case	Package / Case [y]	Number of I/O	Interrupt Output	Clock Frequency	Interface	Voltage - Supply [Max]	Voltage - Supply [Min]	Output Type	Mounting Type
Texas Instruments TCA9538PWR	16-TSSOP	85 °C	-40 °C	0.173 in	16-TSSOP	4.4 mm	8		400 kHz	I2C	5.5 V	1.65 V	Push-Pull	Surface Mount

Catalog

8-bit 1.65- to 5.5-V I2C/SMBus I/O expander with interrupt, reset & config registers

Key Features

• Low Standby Current ConsumptionI2C to Parallel Port ExpanderOpen-Drain Active-Low Interrupt OutputActive-Low Reset InputOperating Power-Supply Voltage Range of 1.65 V to 5.5 V5-V Tolerant I/O Ports400-kHz Fast I2C BusTwo Hardware Address Pins Allow up to Four Devices on the I2C/SMBusInput and Output Configuration RegisterPolarity Inversion RegisterPower-Up With All Channels Configured as InputsNo Glitch on Power UpNoise Filter on SCL/SDA InputsLatched Outputs With High-Current Drive Maximum Capability for Directly Driving LEDsLatch-Up Performance Exceeds 100 mA Per JESD 78, Class IIESD Protection Exceeds JESD 222000-V Human-Body Model (A114-A)1000-V Charged-Device Model (C101)Low Standby Current ConsumptionI2C to Parallel Port ExpanderOpen-Drain Active-Low Interrupt OutputActive-Low Reset InputOperating Power-Supply Voltage Range of 1.65 V to 5.5 V5-V Tolerant I/O Ports400-kHz Fast I2C BusTwo Hardware Address Pins Allow up to Four Devices on the I2C/SMBusInput and Output Configuration RegisterPolarity Inversion RegisterPower-Up With All Channels Configured as InputsNo Glitch on Power UpNoise Filter on SCL/SDA InputsLatched Outputs With High-Current Drive Maximum Capability for Directly Driving LEDsLatch-Up Performance Exceeds 100 mA Per JESD 78, Class IIESD Protection Exceeds JESD 222000-V Human-Body Model (A114-A)1000-V Charged-Device Model (C101)

Description

The TCA9538 is a 16-pin device that provides 8 bits of general purpose parallel input and output (I/O) expansion for the two-line bidirectional I2C bus (or SMBus) protocol. The device can operate with a power supply voltage ranging from 1.65 V to 5.5 V. The device supports both 100-kHz (Standard-mode) and 400-kHz (Fast-mode) clock frequencies. I/O expanders such as the TCA9538 provide a simple solution when additional I/Os are needed for switches, sensors, push-buttons, LEDs, fans, etc. The features of the TCA9538 include an interrupt that is generated on theINTpin whenever an input port changes state. The A0 and A1 hardware selectable address pins allow up to four TCA9538 devices on the same I2C bus. The device can also be reset to its default sate by using theRESETfeature or by cycling the power supply and causing a power-on reset. The TCA9538 is a 16-pin device that provides 8 bits of general purpose parallel input and output (I/O) expansion for the two-line bidirectional I2C bus (or SMBus) protocol. The device can operate with a power supply voltage ranging from 1.65 V to 5.5 V. The device supports both 100-kHz (Standard-mode) and 400-kHz (Fast-mode) clock frequencies. I/O expanders such as the TCA9538 provide a simple solution when additional I/Os are needed for switches, sensors, push-buttons, LEDs, fans, etc. The features of the TCA9538 include an interrupt that is generated on theINTpin whenever an input port changes state. The A0 and A1 hardware selectable address pins allow up to four TCA9538 devices on the same I2C bus. The device can also be reset to its default sate by using theRESETfeature or by cycling the power supply and causing a power-on reset.