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PCA9539 - Remote 16-Bit I2C and SMBus Low-Power I/O Expander

General Description

This 16-bit I/O expander for the two-line bidirectional bus (I2C) is designed for 2.3-V to 5.5-V VCC operation.

It provides general-purpose remote I/O expansion for most microcontroller families via the I2C interface [serial clock (SCL), serial data (SDA)].

Key Features

  • 1 Low Standby-Current Consumption of 1 μA Max.
  • I2C to Parallel Port Expander.
  • Open-Drain Active-Low Interrupt Output.
  • Active-Low Reset Input.
  • 5-V Tolerant I/O Ports.
  • Compatible With Most Microcontrollers.
  • 400-kHz Fast I2C Bus.
  • Polarity Inversion Register.
  • Address by Two Hardware Address Pins for Use of up to Four Devices.
  • Latched Outputs With High-Current Drive Capability for Directly Driving LEDs.

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Product Folder Sample & Buy Technical Documents Tools & Software Support & Community PCA9539 SCPS130G – AUGUST 2005 – REVISED JUNE 2014 PCA9539 Remote 16-Bit I2C and SMBus Low-Power I/O Expander With Interrupt Output, Reset, and Configuration Registers 1 Features •1 Low Standby-Current Consumption of 1 μA Max • I2C to Parallel Port Expander • Open-Drain Active-Low Interrupt Output • Active-Low Reset Input • 5-V Tolerant I/O Ports • Compatible With Most Microcontrollers • 400-kHz Fast I2C Bus • Polarity Inversion Register • Address by Two Hardware Address Pins for Use of up to Four Devices • Latched Outputs With High-Current Drive 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