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Automotive Low-Voltage 16-Bit I2C and SMBus Low-Power I/O Expander

NEW - Custom reel may be available
Inventory: 2,650  

Quality information

RoHS Yes
Lead finish / Ball material NIPDAU
MSL rating / Peak reflow Level-1-260C-UNLIM
Quality, reliability
& packaging information

Information included:

  • RoHS
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring
View or download

Packaging information

Package | Pins Package qty | Carrier: Operating temperature range (℃)
TSSOP (PW) | 24 2,000 | LARGE T&R
Custom reel may be available
-40 to 125
Package | Pins TSSOP (PW) | 24
Package qty | Carrier: 2,000 | LARGE T&R
Custom reel may be available
Operating temperature range (℃) -40 to 125
View TI packaging information

Features for the TCA9539-Q1

  • Qualified for Automotive Applications
  • I2C to Parallel Port Expander
  • Open-Drain Active-Low Interrupt Output
  • Active-Low Reset Input
  • 5-V Tolerant Input and Output Ports
  • Compatible With Most Microcontrollers
  • 400-kHz Fast I2C Bus
  • Polarity Inversion Register
  • Internal Power-on-Reset
  • No Glitch on Power Up
  • Address by Two Hardware Address Pins for Use of up to Four Devices
  • Latched Outputs for Directly Driving LEDs
  • Latch-Up Performance Exceeds 100-mA Per JESD 78, Class II
  • ESD Protection Exceeds JESD 22
    • 2000-V Human-Body Model (A114-A)
    • 1000-V Charged-Device Model (C101)

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Description for the TCA9539-Q1

The TCA9539-Q1 is a 24-pin device that provides 16 bits of generalpurpose parallel input and output (I/O) expansion for the two-line bidirectionalI2C bus (or SMBus protocol). The device can operate with a power supplyvoltage (VCC) range from 1.65 V to 3.6 V. The device supports 100-kHz(I2C Standard mode) and 400-kHz (I2C Fastmode) clock frequencies. I/O expanders such as the TCA9539-Q1 provide a simple solution whenadditional I/Os are needed for switches, sensors, push-buttons, LEDs, fans, and other similardevices.

The features of the TCA9539-Q1 include an interrupt that is generated on theINT pin whenever an input port changes state. The A0 and A1 hardwareselectable address pins allow up to four TCA9539-Q1 devices on the sameI2C bus. The device can be reset to its default state by cycling thepower supply and causing a power-on-reset. Also, the TCA9539-Q1 has a hardwareRESET pin that can be used to reset the device to its default state.

The TCA9539-Q1I2C I/O expander is qualified for automotive applications.


Qty Price (USD)
1-99 1.216
100-249 1.005
250-999 0.722
1,000+ 0.543