Specifications
Manufacturer: STMicroelectronics
Device Type: Automotive-grade 2Mbit SPI serial nonvolatile EEPROM memory chip, supplied in tape and reel format for automated surface mounting assembly
Electrical Parameters
Total storage capacity: 2Mbit, organized as 256K × 8-bit data words
Operating supply voltage range: 1.8 V to 5.5 V
Maximum SPI clock frequency: 20 MHz
Single page capacity: 256 bytes, optimized for batch continuous writing
Maximum programming time per page: 5 ms
Guaranteed erase and write cycles per memory cell: 4 million times
Data retention lifespan: Minimum 200 years under standard ambient temperature
Quiescent standby current stays extremely low to adapt to battery-powered equipment
Operating temperature range: -40 ℃ to +125 ℃
Automotive qualification standard: AEC-Q100 Grade 1
Package specification: 8-pin narrow SOIC surface mount package
Core Features
Compliant with standard SPI bus communication protocol, easily matched with automotive main microcontrollers
Hardware write protection pin can lock upper half memory space or the entire chip to prevent accidental data erasure
Four configurable device address bits allow multiple identical memory chips to work on one SPI bus simultaneously
Built-in power-up detection and undervoltage protection circuit, avoiding abnormal writing operations during power fluctuation
Enhanced internal electrostatic and latch-up protection circuit adapts to harsh vehicle electrical environments
Multiple power saving modes effectively reduce static power consumption during vehicle parking standby
Stable read and write performance under wide temperature variation range
Halogen-free packaging materials comply with RoHS environmental requirements
Typical Applications
Automotive ECU operating parameter and calibration data storage
Vehicle body control module configuration information backup
On-board infotainment system user setting and log recording
Commercial vehicle instrument panel mileage and fault code preservation
Automotive sensor calibration parameter storage
Embedded automotive electronic system firmware configuration backup
