TCA9554DBQR Part Information

Details for TCA9554DBQR by Texas Instruments

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

Part Description

The TCA9554 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 TCA9554 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 TCA9554 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 TCA9554 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 SSOP
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 I/O Expander SSOP16 | RS Components
  • 8-bit 1.65- to 5.5-V I2C/SMBus I/O expander with interrupt, weak pull-up & config registers | Texas Instruments

Frequently Asked Questions

Where can I find additional details, specifications and documents for a TCA9554DBQR?

Additional datasheets, footprints and schematics for TCA9554DBQR are listed in our Part Details tab. You can also find the TCA9554DBQR image and similar parts on this details page.

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What category does TCA9554DBQR fall under?

The TCA9554DBQR is listed under Electronic & Electrical Components > Semiconductors - ICs > Driver & Interface ICs.

Can I view similar or alternative parts?

You can view similar parts to TCA9554DBQR when available in the Driver & Interface ICs range under the specifications section at the bottom of the details page.

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Is the TCA9554DBQR RoHS compliant?

Yes. This part has been flagged as RoHS Compliant by Farnell.

Which authorised distributors for TCA9554DBQR have stock available?

Authorised distributors including RS Components and Texas Instruments have stock available or on a lead time for TCA9554DBQR.

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