资 源 简 介
The low voltage X4C105 combines several funcTIons intoone device. The first is a 2-wire, 4k-bit serial EEPROMmemory with write protecTIon. A Write Protect (WP) pinprovides hardware protecTIon for the upper half of thismemory against inadvertent writes.A one nibble NOVRAM is provided and occupies a singlelocaTIon. This allows access of 4-bits in a single 150ns cycle.This is useful for tracking system operation or processstatus. The NOVRAM memory is completely isolated fromthe serial memory section.A low voltage detect circuit activates a RESET pin when VCCdrops below 3V. This signal also blocks new read or writeoperations and initiates a NOVRAM AUTOSTORE. TheAUTOSTORE operation is powered by an external capacitorto ensure that the value in the NOVRAM is alwaysmaintained in the event of a power failure.The four NOVRAM bits also appear on four separate outputpins to allow continuous control of external circuitry, such asASICs.Intersil EEPROMs are designed and tested for applicationsrequiring extended endurance. Inherent data retention isgreater than 100 years.
