Low-Voltage, 8-Bit I²C-Bus and SMBus I/O Expander with Interrupt Output, Reset and Configuration Registers

PCA6408A

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Block Diagram

PCA6408A Block Diagram

PCA6408A Block Diagram

Features

Key Features

  • I2C-bus to parallel port expander
  • Operating power supply voltage range of 1.65 V to 5.5 V
  • Low standby current consumption of 1 μA
  • 5 V tolerant I/O ports
  • Active LOW reset input (RESET)
  • Open-drain active LOW interrupt output (INT)
  • 400 kHz Fast-mode I2C-bus
  • Input/Output Configuration register
  • Polarity Inversion register
  • Internal power-on reset
  • Power-up with all channels configured as inputs
  • No glitch on power-up
  • Noise filter on SCL/SDA inputs
  • Latched outputs with 25 mA drive maximum capability for directly driving LEDs
  • Latch-up performance exceeds 100 mA per JESD 78, Class II
  • Packages offered: HVQFN16, TSSOP16, XQFN16

Allows Bidirectional Voltage-level Translation and GPIO Expansion Between

  • 1.8 V SCL/SDA and 1.8 V, 2.5 V, 3.3 V or 5 V Port P
  • 2.5 V SCL/SDA and 1.8 V, 2.5 V, 3.3 V or 5 V Port P
  • 3.3 V SCL/SDA and 1.8 V, 2.5 V, 3.3 V or 5 V Port P
  • 5 V SCL/SDA and 1.8 V, 2.5 V, 3.3 V or 5 V Port P

Schmitt-trigger Action Allows Slow Input Transition and Better Switching Noise Immunity at the SCL and SDA Inputs

  • Vhys = 0.18 V (typical) at 1.8 V
  • Vhys = 0.25 V (typical) at 2.5 V
  • Vhys = 0.33 V (typical) at 3.3 V
  • Vhys = 0.5 V (typical) at 5 V

ESD Protection Exceeds JESD 22

  • 2000 V Human-Body Model (A114-A)
  • 1000 V Charged-Device Model (C101)

Part numbers include: PCA6408ABS, PCA6408AHK, PCA6408APW.

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Design Resources

Design Files

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Hardware

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