Microchip Introduces 4Kb Serial Sense EEPROM Device for DDR4 SDRAM Modules

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Microchip Technology Inc. announces the introduction of the next-generation 4KbI2CTM Serial Presence Detection (SPD) EEPROM device 34AA04. The new device is specifically designed to support the next-generation Double Data Rate 4 (Double Data Rate 4, DDR4) SDRAM module in high-speed PCs and notebooks, as well as the previous generation DDR2/3 platform.

Designed for the highly competitive consumer market, the new device offers a wide operating voltage range (1.7V to 3.6V). The device is compliant with the JEDEC JC42.4 (EE1004-v) SPD standard and is compatible with DDR4 SDRAM modules. The 34AA04 includes four independent 128 x 8-bit blocks with reversible software write protection and new SMBus-compatible bus timeout functionality. The device's page write capability is up to 16 bytes of data, and three address pins are available to allow up to eight devices to be connected simultaneously on the same bus.

The 34AA04 is backward compatible with existing DDR2 and DDR3 SPD EEPROM devices. To ensure this backward compatibility, the 34AA04's memory array is divided into two separate 256-byte partitions that can be stacked with the previous generation SPD EEPROM device architecture. The 34AA04 can be used in a variety of products in the consumer electronics market, including PCs, notebooks and graphics cards.

Randy Drwinga, vice president of storage products at Microchip , said: "From previous DDR1, DDR2 to DDR3 platforms, Microchip has been upgrading SPD EEPROM devices to meet the DRAM market. Now we are pleased to introduce a new generation of SPD EEPROMs for DDR4 DIMM modules that are JEDEC compliant. The new device integrates four independent blocks with reversible software write protection, faster data rates, and is also SMBus-compatible, which gives DRAM manufacturers greater flexibility to make them available in high-speed PCs and notebooks. Easily add more new features to your computer and graphics products."

Supply

The 34AA04 devices are sampling now and are in volume production in 8-pin SOIC, TDFN, UDFN, TSSOP and PDIP packages, available in quantities of 10,000.

For more information, please contact a Microchip sales representative or authorized worldwide distributor or visit the Microchip web site at http:// To purchase the products mentioned in the text, you can purchase them from the microchipDIRECT website or contact an authorized Microchip distribution partner.