General Description

The EC34C04 is a 1.7V rated minimum operating voltage Serial EEPROM device containing 4096-bits of Serially
Electrically Erasable and Programmable Read-Only Memory (EEPROM) organized as 512-bytes of eight bits each.

The Serial EEPROM operation is tailored specifically for DRAM memory modules with Serial Presence Detect
(SPD) to store a module‟s vital product data such as the module‟s size, speed, voltage, data width, and timing
parameters. The EC34C04 is protocol compatible with the legacy JEDEC EE1002 specification (2-Kbit) devices
enabling the EC34C04 to be utilized in legacy applications without any software changes. The device is designed
to respond to specific software commands that allow users to identify and set which half of the memory the internal
address counter is located.

This special page addressing method to select the upper or lower half of the Serial EEPROM is what facilitates legacy compatibility. However, there is one exception to the legacy compatibility as the EC34C04 does not support the Permanent Write Protection feature. Additionally, the EC34C04 incorporates a Reversible Software Write Protection (RSWP) feature enabling the capability to selectively write protect any or all of the four 128-byte quadrants. Once the RSWP is set, it can only be reversed by sending a specific software command sequence.

The EC34C04 supports the industry standard 2-wire I2C Fast-Mode Plus (FM+) serial interface allowing device communication to operate at up to 1MHz. A bus timeout feature is supported to help prevent system lock-ups. The EC34C04 is available in space saving SOP, TSSOP, and UDFN packages.

Features

◆Low voltage and low power operations:VCC = 1.7V to 3.6V, Industrial temperature range (-40℃ to 85℃).
◆JEDEC JC42.4 (EE1004-v) Serial Presence Detect (SPD) Compliant
◆Individually reversible software write protection on all four 128-byte quadrants.
◆16 bytes page write mode.
◆Partial page write operation allowed.
◆Industry standard 100kHz, 400 kHz, and 1MHz I2C interface.
◆Schmitt trigger, filtered inputs for noise protection.
◆Self-timed programming cycle (5ms maximum).
◆Bus Timeout Supported
◆Automatic erase before write operation.
◆High reliability: typically 1,000,000 cycles endurance.
◆100 years data retention.
◆Standard 8-lead JEDEC SOP, 8-lead TSSOP, and 8-pad UDFN Pb-free packages.