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NCA9547A Datasheet 8-channel I2c-bus Multiplexer

Manufacturer: Nexperia

Overview: NCA9547A 8-channel I²C-bus multiplexer with reset Rev. 1 — 20 August 2025 Product data sheet 1.

General Description

The NCA9547A is an octal bidirectional translating multiplexer controlled by the I²C-bus.

The SCL/ SDA upstream pair fans out to eight downstream pairs, or channels.

Only one SCn/SDn channel can be selected at a time, determined by the contents of the programmable control register.

Key Features

  • 1-of-8 bidirectional translating multiplexers.
  • I²C-bus interface logic; compatible with SMBus standards.
  • Active LOW reset input.
  • Three address pins allowing up to eight devices on the I²C-bus.
  • Channel selection via I²C-bus, one channel at a time.
  • Power-up with all channels deselected, except channel 0 which is connected.
  • Low Ron multiplexers.
  • Allows voltage level translation between 1.8 V, 2.5 V, 3.3 V and 5 V buses.

More Datasheets from Nexperia

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NCA9547A Distributor