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PCA9538

ACTIVE

8-bit 2.3- to 5.5-V I2C/SMBus I/O expander with interrupt, reset & config registers

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Data sheet

A newer version of this product is available

open-in-new Compare alternates
Drop-in replacement with upgraded functionality to the compared device
TCA9538 ACTIVE 8-bit 1.65- to 5.5-V I2C/SMBus I/O expander with interrupt, reset & config registers Performance enhancements for power-on reset, interrupt, and lower voltage operation.

PCA9538

ACTIVE
Data sheet Order now

Product details

Number of I/Os 8 Features Configuration registers, Interrupt pin, Reset pin Supply voltage (min) (V) 2.3 Supply voltage (max) (V) 5.5 Addresses 4 Rating Catalog Frequency (max) (MHz) 0.4 Operating temperature range (°C) -40 to 85
Number of I/Os 8 Features Configuration registers, Interrupt pin, Reset pin Supply voltage (min) (V) 2.3 Supply voltage (max) (V) 5.5 Addresses 4 Rating Catalog Frequency (max) (MHz) 0.4 Operating temperature range (°C) -40 to 85
SOIC (DW) 16 106.09 mm² 10.3 x 10.3 SSOP (DB) 16 48.36 mm² 6.2 x 7.8 TSSOP (PW) 16 32 mm² 5 x 6.4 TVSOP (DGV) 16 23.04 mm² 3.6 x 6.4
  • Low standby current consumption of 1 µA max
  • I2C to parallel port expander
  • Open-drain active-low interrupt output
  • Active-low reset input
  • Operating power-supply voltage range of 2.3 V to 5.5 V
  • 5-V Tolerant I/O ports
  • 400-kHz Fast I2C bus
  • Two hardware address pins allow up to four devices on the I2C/SMBus
  • Input and output configuration register
  • Polarity inversion register
  • Power-up with all channels configured as inputs
  • No glitch on power up
  • Noise filter on SCL/SDA inputs
  • Latched outputs with high-current drive maximum capability 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)
    • 200-V Machine model (A115-A)
    • 1000-V Charged-device model (C101)
  • Low standby current consumption of 1 µA max
  • I2C to parallel port expander
  • Open-drain active-low interrupt output
  • Active-low reset input
  • Operating power-supply voltage range of 2.3 V to 5.5 V
  • 5-V Tolerant I/O ports
  • 400-kHz Fast I2C bus
  • Two hardware address pins allow up to four devices on the I2C/SMBus
  • Input and output configuration register
  • Polarity inversion register
  • Power-up with all channels configured as inputs
  • No glitch on power up
  • Noise filter on SCL/SDA inputs
  • Latched outputs with high-current drive maximum capability 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)
    • 200-V Machine model (A115-A)
    • 1000-V Charged-device model (C101)
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Technical documentation

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Type Title Date
* Data sheet PCA9538 Remote 8-Bit I2C AND SMBus Low-power I/O Expander with Interrupt Output, Reset, and Configuration Registers datasheet (Rev. G) PDF | HTML 11 Mar 2021
Application note Understanding Transient Drive Strength vs. DC Drive Strength in Level-Shifters (Rev. A) PDF | HTML 03 Jul 2024
Application note I2C Dynamic Addressing 25 Apr 2019
Selection guide Logic Guide (Rev. AB) 12 Jun 2017
Application note Choosing the Correct I2C Device for New Designs PDF | HTML 07 Sep 2016
Application note Understanding and Interpreting Standard-Logic Data Sheets (Rev. C) 02 Dec 2015
Application note Understanding the I2C Bus PDF | HTML 30 Jun 2015
Application note Maximum Clock Frequency of I2C Bus Using Repeaters 15 May 2015
Application note I2C Bus Pull-Up Resistor Calculation PDF | HTML 13 Feb 2015
Application note Programming Fun Lights With TI's TCA6507 30 Nov 2007
Application note Semiconductor Packing Material Electrostatic Discharge (ESD) Protection 08 Jul 2004

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Simulation model

PCA9538 IBIS Model (Rev. A)

SCPM009A.ZIP (90 KB) - IBIS Model
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SOIC (DW) 16 Ultra Librarian
SSOP (DB) 16 Ultra Librarian
TSSOP (PW) 16 Ultra Librarian
TVSOP (DGV) 16 Ultra Librarian
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