M34C02-LDW6P 数据手册 ( 数据表 ) - STMicroelectronics

Summary description
The M34C02-W, M34C02-L and M34C02-R are 2Kbit serial EEPROM memory able to lock permanently the data in its first half (from location 00h to 7Fh). This facility has been designed specifically for use in DRAM DIMMs (dual interline memory modules) with Serial Presence Detect. All the information concerning the DRAM module configuration (such as its access speed, its size, its organization) can be kept write protected in the first half of the memory.
This bottom half of the memory area can be write-protected using a specially designed software write protection mechanism. By sending the device a specific sequence, the first 128 Bytes of the memory become permanently write protected. Care must be taken when using this sequence as its effect cannot be reversed. In addition, the device allows the entire memory area to be write protected, using the WC input (for example by tieing this input to VCC).

FEATURE summary
■ Software Data Protection for lower 128 Bytes
■ Two Wire I2C Serial Interface
■ 400kHz Transfer Rates
■ Single Supply Voltage:
   – 2.5 to 5.5V for M34C02-W
   – 2.2 to 5.5V for M34C02-L
   – 1.8 to 5.5V for M34C02-R
■ Byte and Page Write (up to 16 bytes)
■ Random and Sequential Read modes
■ Self-Timed Programming Cycle
■ Automatic Address Incrementing
■ Enhanced ESD/Latch-Up Protection
■ More than 1 million Write cycles
■ More than 40 Year Data Retention
■ Packages
   – ECOPACK® (RoHS compliant)