●Overview
●The 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 set 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/SMBus 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 bypass the CPU-defined VID values and provide a different set of VID values the VRM, if an increase in the CPU voltage is desired. An increase in CPU voltage combined with an increase in CPU frequency leads to a performance boost of up to 7.5pct. Lower CPU voltage reduces power consumption.
●The PCA9559 has 2 address pins allowing up to 4 devices to be placed on the same I²C-bus or SMBus.
●MoreLess
●## Features
● 5-bit 2-to-1 multiplexer, 1-bit latch DIP switch
● 6-bit internal non-volatile register
● Internal non-volatile register programmable and readable via I²C-bus
● Override input forces all outputs to logic 0
● 5 open drain multiplexed outputs
● 1 open drain non-multiplexed (latched) output
● 5 V and 2.5 V tolerant inputs
● Useful for ?jumperless? configuration of PC motherboards
● 2 address pins, allowing up to 4 devices on the I²C-bus
● ESD protection exceeds 2000 V HBM per JESD22-A114, 200 V MM per JESD22-A115 and 1000 V CDM per JESD22-C101
● Latch-up testing is done to JESDEC Standard JESD78 which exceeds 100 mA
●## Features
