PCA9559 5-bit multiplexed/1-bit latched 6-bit I2C-bus EEPROM DIP switch

PublishTime：2022-02-28

●PCA9559 is a 20-pin CMOS device consisting of one 6-bit non-volatile EEPROM registers, 5 hardware pin inputs and a 5-bit multiplexed output with one latched EEPROM bit. It is used for DIP switch-free or jumper-less system configuration and supports Mobile and Desktop VID Configuration, where 2 preset values (1 sets of internal non-volatile registers and 1 set of external hardware pins) set processor voltage for operation in either performance or deep sleep modes. The PCA9559 is also useful in server and telecom/networking applications when used to replace DIP switches or jumpers, since the settings can be easily changed via I2C/SM Bus without having to power down the equipment to open the cabinet. The non-volatile memory retains the most current setting selected before the power is turned off.
The PCA9559 typically resides between the CPU and Voltage Regulator Module (VRM)when used for CPU VID (Voltage IDentification code) configuration. It is used to bypassthe CPU-defined VID values and provide a different set of VID values to the VRM, if anincrease in the CPU voltage is desired. An increase in CPU voltage combined with anincrease in CPU frequency leads to a performance boost of up to 7.5%. Lower CPUvoltage reduces power consumption.
The PCA9559 has 2 address pins allowing up to 4 devices to be placed on the same I2C-bus or SMBus.

Brand of Product：	NXP
Part#：	PCA9559 、 PCA9559PW More Part#
Product Category：	DIP switch More
Application：	More
Data Type：	Datasheet More
Safety & Environment Standards：	More
Operating Temperature：	Please see the document for details
Qualification Grade：	More
Qualification Approval：	More
Package：	TSSOP20
Language：	English Chinese Chinese and English Japanese
Date of Creation：	25 October 2021
Version Number：	Rev. 5.0
Data Encoding：
Data Size：	291 KB

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