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PCA9561 Datasheet Quad 6-bit multiplexed I2C EEPROM DIP switch

Manufacturer: NXP Semiconductors

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General Description

The PCA9561 is a 20-pin CMOS device consisting of four 6-bit non-volatile EEPROM registers, six hardware pin inputs and a 6-bit multiplexed output.

It is used for DIP switch-free or jumper-less system configuration and supports Mobile and Desktop VID Configuration, where five preset values (four sets of internal non-volatile registers and one set of external hardware pins) set processor voltage for operation in various performance or battery conservation sleep modes.

The PCA9561 is also useful in server and telecommunications/networking applications when used to replace DIP switches or jumpers, since the settings can be easily changed via I2C-bus/SMBus without having to power down the equipment to open the cabinet.

Overview

PCA9561 Quad 6-bit multiplexed I2C-bus EEPROM DIP switch Rev.

4 — 6 November 2012 Product data sheet 1.

Key Features

  • Selection of non-volatile register_n as source to MUX_OUT pins via I2C-bus.
  • I2C-bus can override MUX_SELECT pin in selecting output source.
  • 6-bit 5-to-1 multiplexer DIP switch.
  • Four internal non-volatile registers.
  • Internal non-volatile registers programmable and readable via I2C-bus.
  • Six open-drain multiplexed outputs.
  • 400 kHz maximum clock frequency.
  • Operating supply voltage 3.0 V to 3.6 V.
  • 5 V and 2.5 V tolerant inputs/outputs.
  • Useful for Spe.

More Datasheets from NXP Semiconductors

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