34AA04T-E/ST

Overview

The Microchip Technology 34AA04T-E/ST 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 offers a typical access time of 350 ns. Packaged in an 8-TSSOP format, it supports surface mount installation and maintains data retention for up to 200 years across an industrial temperature range of -40°C to +85°C.

Feature Summary

• Supports Serial Peripheral Data (SPD) specifications for DDR4 memory modules
• Operates on a standard 2-Wire I2C bus interface
• Provides long-term non-volatile data retention

Applications

• Serial Presence Detect (SPD) storage for DDR4 SDRAM modules
• System configuration data logging
• Low-power embedded memory systems

Procurement Notes

Verify the specific suffix 'E' indicates the extended industrial temperature range (-40°C to +85°C) compared to commercial variants. Confirm the '/ST' designation corresponds to the 8-TSSOP package type required for your PCB layout. Ensure the 1.7V to 3.6V operating voltage aligns with your system's power rails before procurement.

Selection Notes

Select this component when SPD compliance for DDR4 is required alongside low-voltage operation. The 4-kbit capacity suits standard module identification needs. Consider the 1 MHz I2C speed for moderate data throughput requirements. The TSSOP-8 package facilitates automated surface-mount assembly processes.

Part Context

This part belongs to the 34AA04 series of serial EEPROMs from Microchip Technology. It shares architectural similarities with other 4-kbit I2C EEPROMs but is specifically optimized for SPD applications. The series typically includes variations in packaging and temperature ratings to support diverse manufacturing environments.

Replacement Considerations

Direct substitutes include the 34AA04T-I/ST for identical functionality with potentially different temperature grading or packaging nuances. Verify pin compatibility and electrical specifications against the original datasheet before substitution.