4Kbit I2C EEPROM for DDR4 features backward compatibility
Microchip Technology Inc. has launched a 4Kbit I2C electrically erasable PROM (EEPROM) device that supports DDR4 SDRAM modules used in high-speed PCs and laptops, as well as older DDR2/3 platforms.
The 34AA04 is JEDEC JC42.4 (EE1004-v) Serial Presence Detect (SPD) compliant. Its memory array is divided into two separate 256byte banks to overlay with the architecture of older SPD EEPROM devices, ensuring backward compatibility.
The device includes reversible software write protection for each of four independent 128x8bit blocks and supports a new SMBus compatible bus time out. It features a page write capability of up to 16B of data, and 3 address pins that allow up to eight devices on the same bus.
"The reversible software write-protect on four individual blocks, faster data rates and SMBus compatibility offers DRAM manufacturers added flexibility to enable new features in the high-speed PC, laptop and graphic card markets," said Randy Drwinga, VP of Microchip's Memory Products Division.
The 34AA04 comes in the 8-lead PDIP, SOIC, TSSOP, TDFN, and UDFN packages. It is available for sampling and volume production, starting at $0.20 each in 10,000 unit quantities.