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NCA9555 - Low-voltage 16-bit I2C and SMBus I/O expander

Datasheet Summary

Description

The NCA9555 provides 16 bits of General Purpose Input/Output (GPIO) expansion for I²C-bus/SMBus applications.

It is designed for a wide voltage range of 1.65 V to 5.5 V with interrupt and default pull-up resistors on GPIOs.

Features

  • I²C-bus to parallel port expander.
  • Operating power supply voltage range of 1.65 V to 5.5 V.
  • Low standby current consumption:.
  • 2.5 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 with weak pull-up resi.

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Datasheet Details

Part number NCA9555
Manufacturer nexperia
File Size 449.34 KB
Description Low-voltage 16-bit I2C and SMBus I/O expander
Datasheet download datasheet NCA9555 Datasheet
Additional preview pages of the NCA9555 datasheet.

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Full PDF Text Transcription

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NCA9555 Low-voltage 16-bit I²C and SMBus I/O expander with interrupt output and configuration registers Rev. 3 — 24 April 2023 Product data sheet 1. General description The NCA9555 provides 16 bits of General Purpose Input/Output (GPIO) expansion for I²C-bus/SMBus applications. It is designed for a wide voltage range of 1.65 V to 5.5 V with interrupt and default pull-up resistors on GPIOs. 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 NCA9555 contains a set of 8 bit input, output, configuration and polarity inversion registers. At power up all IOs default to inputs.
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