Remote 8-Bit I/O Expander for I²C-Bus with Interrupt

PCA8574_74A

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Block Diagram

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PCA8574/PCA8574A Block Diagram

PCA8574-PCA8574A Block Diagram

Block diagram: PCA8574AD, PCA8574AN, PCA8574APW, PCA8574ATS, PCA8574D, PCA8574N, PCA8574PW, PCA8574TS

Block diagram: PCA8574AD, PCA8574AN, PCA8574APW, PCA8574ATS, PCA8574D, PCA8574N, PCA8574PW, PCA8574TS

Features

  • I²C‑bus to parallel port expander
  • 400 kHz I²C‑bus interface (Fast-mode I²C‑bus)
  • Operating supply voltage 2.3 V to 5.5 V with 5.5 V tolerant I/Os held to VDD with 100 μA current source
  • 8-bit remote I/O pins that default to inputs at power-up
  • Latched outputs with 25 mA sink capability for directly driving LEDs
  • Total package sink capability of 200 mA
  • Active LOW open-drain interrupt output
  • Eight programmable target addresses using three address pins
  • Low standby current (4.5 μA typical)
  • -40 °C to +85 °C operation
  • ESD protection exceeds 2000 V HBM per JESD22-A114 and 1000 V CDM per JESD22-C101
  • Latch-up testing is done to JEDEC standard JESD78 which exceeds 100 mA
  • Packages offered: SO16, TSSOP16, SSOP20

Target Applications

  • LED signs and displays
  • Servers
  • Key pads
  • Industrial control
  • Medical equipment
  • PLCs
  • Cellular telephones
  • Gaming machines
  • Instrumentation and test measurement

Documentation

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Hardware

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