Features: Sequential read of entire array
4 byte "Page write" mode to minimize total write time per byte
/WP pin and BLOCK WRITE protection to prevent inadvertent programming as well as programming ENABLE and DISABLE opcodes.
/HOLD pin to suspend data transfer
Typical 1A standby current (ISB) for "L" devices and 0.1A standby current for "LZ" devices.
Endurance: Up to 1,000,000 data changes
Data retention greater than 40 yearsPinout
SpecificationsAmbient Storage Temperature.................................... .....-65°C to +150°C
All Input or Output Voltage with Respect to Ground.............. +6.5V to -0.3V
Lead Temp. (Soldering, 10 sec.)..................................................... .+300°C
ESD Rating......................................................................................... .2000VDescriptionThe FM25C040U is a 4K (4,096) bit serial interface CMOS EEPROM (Electrically Erasable Programmable Read-Only Memory). FM25C040U fully conforms to the SPI 4-wire protocol which uses Chip Select (/CS), Clock (SCK), Data-in (SI) and Dataout (SO) pins to synchronously control data transfer between the SPI microcontroller and the EEPROM. In addition, the serial interface allows a minimal pin count, packaging designed to simplify PC board layout requirements and offers the designer a variety of low voltage and low power options.
This SPI EEPROM FM25C040U family is designed to work with the 68HC11 or any other SPI-compatible, high-speed microcontroller and offers both hardware (/WP pin) and software ("block write") data protection. For example, entering a 2-bit code into the STATUS REGISTER prevents programming in a selected block of memory and all programming can be inhibited by connecting the /WP pin to VSS;allowing the user to protect the entire array or a selected section. In addition, SPI FM25C040U feature a /HOLD pin, which allows a temporary interruption of the datastream into the EEPROM.
Fairchild EEPROMs FM25C040U are designed and tested for applications requiring high endurance, high reliability, and low power consumption for a continuously reliable non-volatile solution for all markets.
FM25C040U Data Sheet
