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NCA9547A-Q100 - 8-channel I2C-bus multiplexer

General Description

The NCA9547-Q100 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

  • Automotive product qualification in accordance with AEC-Q100 (Grade 1).
  • Specified from -40 °C to +85 °C and from -40 °C to +125 °C.
  • 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 ch.

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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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NCA9547A-Q100 8-channel I²C-bus multiplexer with reset Rev. 1 — 20 August 2025 Product data sheet 1. General description The NCA9547-Q100 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. The device powers up with Channel 0 connected, allowing immediate communication between the controller and downstream devices (targets) on that channel. An active LOW reset input allows the NCA9547Q100 to recover from a situation where one of the downstream I²C-buses is stuck in a LOW state.