CAT34C02

EEPROM Serial 2-Kb I2C for DDR2 DIMM SPD CAT34C02 Description The CAT34C02 is a EEPROM Serial 2−Kb I2C, internally organized as 16 pages of 16 bytes each, for a total of 256 bytes of 8 bits each. It features a 16−byte page write buffer and supports both the Standard (100 kHz) as well as Fast (400 kHz) I2C protocol. Write operations can be inhibited by taking the WP pin High (this protects the entire memory) or by setting an internal Write Protect flag via Software command (this protects the lower half of the memory). In addition to Permanent Software Write Protection, the CAT34C02 also features JEDEC compatible Reversible Software Write Protection for DDR2 Serial Presence Detect (SPD) applications operating over the 1.7 V to 3.6 V supply voltage range. The CAT34C02 is fully backwards compatible with earlier DDR1 SPD applications operating over the 1.7 V to 5.5 V supply voltage range. Features Supports Standard and Fast I2C Protocol 1.7 V to 5.5 V Supply Voltage Range 16−Byte Page Write Buffer Hardware Write Protection for Entire Memory Software Write Protection for Lower 128 Bytes Schmitt Triggers and Noise Suppression Filters on I2C Bus Inputs (SCL and SDA) Low power CMOS Technology 1,000,000 Program/Erase Cycles 100 Year Data Retention Industrial and Extended Temperature Range This Device is Pb−Free, Halogen Free/BFR Free and RoHS Compliant* VCC SCL A2, A1, A0 WP CAT34C02 SDA VSS Figure 1. Functional Symbol *For additional information on our Pb−Fr...