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PCA9539 - Low-voltage 16-bit I2C and SMBus low-power I/O expander

General Description

The PCA9539 provides 16 bits of General Purpose Input/Output (GPIO) expansion with interrupt and reset for I²C-bus/SMBus applications.

It is designed for a wide voltage range of 2.3 V to 5.5 V.

Key Features

  • I²C-bus to parallel port expander.
  • Operating power supply voltage range of 2.3 V to 5.5 V.
  • Ultra low standby current consumption:.
  • 1 µA (maximum).
  • Schmitt-trigger action allows slow input transition and better switching noise immunity at the SCL and SDA inputs.
  • Vhys = 0.10 × VCC (typical).
  • Noise filter on SCL and SDA inputs.
  • 5 V tolerant I/Os.
  • 16 I/O pins which power up configured in input state.
  • Open-drai.

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Datasheet Details

Part number PCA9539
Manufacturer Nexperia
File Size 435.32 KB
Description Low-voltage 16-bit I2C and SMBus low-power I/O expander
Datasheet download datasheet PCA9539 Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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PCA9539 Low-voltage 16-bit I²C and SMBus low-power I/O expander with interrupt output, reset pin and configuration registers Rev. 1 — 25 April 2023 Product data sheet 1. General description The PCA9539 provides 16 bits of General Purpose Input/Output (GPIO) expansion with interrupt and reset for I²C-bus/SMBus applications. It is designed for a wide voltage range of 2.3 V to 5.5 V. Nexperia GPIO expanders provide an elegant solution when additional IOs are needed while keeping the interconnections to a minimum, for example, in ACPI power switches, sensors, push buttons, LEDs and fan control. The PCA9539 contains a set of 8 bit Input, Output, Configuration and Polarity Inversion registers. At power up all IOs default to inputs.