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Microchip has EEPROM device for DDR4 SDRAM modules

Microchip is now shipping a 4Kb I2C serial presence detect EEPROM device, designed specifically for next generation DDR4 SDRAM modules.

Operating from 1.7 to 3.6V, the 34AA04 is aimed at consumer products such as PCs and laptops. The device is JEDEC JC42.4 (EE1004-v) and is also compatible with older DDR2/3 platforms.

The 34AA04 includes reversible software write protection for each of four independent 128 x 8bit blocks and supports a new SMBus-compatible bus time out. The device also features a page-write capability of up to 16bytes of data and three address pins allow up to eight devices on the same bus.

The module's memory array is divided into two separate 256byte banks to overlay with the architecture of older SPD EEPROM devices.

Author
Laura Hopperton

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