TCA9554ADWR Part Information

Details for TCA9554ADWR by Texas Instruments

Electronic & Electrical Components > Semiconductors - ICs > Driver & Interface ICs

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Part Description

The TCA9554A is a 16-pin device that provides 8 bits of general purpose parallel input/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 TCA9554A provide a simple solution when additional I/Os are needed for switches, sensors, push-buttons, LEDs, fans, and other similar devices. The features of the TCA9554A include an interrupt that is generated on the INT pin whenever an input port changes state. The A0, A1, and A2 hardware selectable address pins allow up to eight TCA9554A devices on the same I2C bus. The device can also be reset to its default sate by cycling the power supply and causing a power-on reset.

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Part Features

  • 400-kHz Fast I2 C Bus
  • 5-V Tolerant I/O Ports
  • ESD Protection Exceeds JESD 22
  • I2 C to Parallel Port Expander
  • Input/Output Configuration Register
  • Internal Power-On Reset
  • Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
  • Latched Outputs With High-Current Drive Maximum Capability for Directly Driving LEDs
  • Low Standby Current Consumption
  • No Glitch on Power Up
  • Noise Filter on SCL/SDA Inputs
  • Open-Drain Active-Low Interrupt Output
  • Operating Power-Supply Voltage Range of 1.65 V to 5.5 V
  • Polarity Inversion Register
  • Power-Up With All Channels Configured as Inputs
  • Three Hardware Address Pins Allow up to Eight Devices on the I2 C/SMBus

Part Specifications

Chip Configuration 8bit
Bus Frequency 400kHz
IC Interface Type I2C SMBus
Supply Voltage Min 1.65V
Supply Voltage Max 5.5V
Interface Case Style SOIC
No. of Pins 16Pins
No. of I/O's 8I/O's
Product Range -
Automotive Qualification Standard -
RoHS Phthalates Compliant Yes
MSL MSL 1 - Unlimited
SVHC No SVHC (27-Jun-2018)
RoHS Compliant

Alternative Part Descriptions

  • Remote 8-Bit I2C and SMBus I/O Expander | Texas Instruments

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