34AA04-E/P

Overview

The Microchip Technology 34AA04-E/P is a 4-kbit serial electrically erasable programmable read-only memory (EEPROM) designed for SPD applications, including DDR4. It features a 2-wire I2C interface with a maximum clock frequency of 1 MHz and an organization of 512 x 8. The device operates within a supply voltage range of 1.7 V to 3.6 V and supports through-hole mounting in a PDIP-8 package. Key electrical parameters include a 350 ns access time, 200-year data retention, and a maximum active read current of 1.5 mA. It functions reliably across an industrial temperature range from -40°C to +85°C.

Feature Summary

• Supports Serial Peripheral Data (SPD) specifications for DDR4 memory modules
• Compatible with standard two-wire I2C bus protocols
• Provides long-term non-volatile data storage with extended retention capabilities

Applications

• System Profile Data (SPD) storage for DDR4 SDRAM modules
• General-purpose non-volatile data logging
• Configuration parameter storage in embedded systems

Procurement Notes

Verify the specific suffix 'E' indicates the industrial temperature grade (-40°C to +85°C) as per official datasheets. Confirm the '/P' designation corresponds to the PDIP-8 through-hole package. Ensure compatibility with the target system's I2C voltage levels, which must fall within the 1.7 V to 3.6 V operating range. Cross-reference the manufacturer part number directly with Microchip Technology documentation to avoid confusion with similar variants.

Selection Notes

Select this component when SPD compliance for DDR4 is required alongside robust industrial temperature performance. The PDIP-8 package is suitable for prototyping or applications requiring through-hole assembly. Consider the 1 MHz I2C speed limit if higher throughput is needed, as faster alternatives exist in the family. Verify that the 4 kbit capacity meets the specific data storage requirements without unnecessary oversizing.

Part Context

This EEPROM belongs to the 34AA04 series, specifically engineered for memory module identification and configuration. Unlike general-purpose EEPROMs, it adheres to JEDEC standards for SPD data structures. The device integrates write protection mechanisms and page write buffers to ensure data integrity during operation. It serves as a critical component for system initialization and hardware inventory tracking in computing platforms.

Replacement Considerations

Direct substitutes may include other 34AA04 variants with different packages, such as 34AA04-I/ST for surface mount applications. Verify pinout compatibility and electrical specifications before substitution. Generic I2C EEPROMs are not direct replacements due to potential differences in SPD data structure support and timing characteristics.