34AA02T-I/ST

Overview

The Microchip Technology 34AA02T-I/ST is a 2 Kbit (256 x 8) serial EEPROM featuring an I²C-compatible 2-wire interface. It operates on a single supply voltage ranging from 1.7V to 5.5V and supports clock frequencies up to 400 kHz. The device includes permanent and resettable software write-protect capabilities for the lower half of the array, alongside hardware protection via the WP pin. It utilizes low-power CMOS technology with typical standby current of 100 nA and read current of 1 mA. The component offers over one million erase/write cycles and data retention exceeding 200 years.

Feature Summary

• Features dual software write-protect modes allowing selective locking of the lower memory half or entire array
• Supports cascading up to eight devices on a single bus using chip select pins
• Includes Schmitt trigger inputs and output slope control for noise suppression and ground bounce elimination

Applications

• Industrial systems requiring non-volatile data storage
• Consumer electronics utilizing low-voltage power supplies
• Embedded controllers needing secure parameter retention

Procurement Notes

Verify the specific package marking code 'I-Temp' corresponds to the industrial temperature range (-40°C to +85°C). Confirm the ordering suffix matches the TSSOP-8 surface mount configuration. Ensure compatibility with the system's I²C pull-up resistor requirements for the selected clock speed.

Selection Notes

Select this part when a 2 Kbit capacity is required within the 34AA02 family. The 'I' designation indicates suitability for industrial environments. The 'T' suffix specifies tape and reel packaging. Verify that the 400 kHz maximum clock frequency meets the system bus timing constraints.

Part Context

This component belongs to the 34AA02/34LC02 series of serial EEPROMs manufactured by Microchip Technology. It shares functional similarities with other devices in the line but differs in voltage ranges and clock speeds. The 34AA02 variant specifically supports operation down to 1.7V, distinguishing it from higher-voltage counterparts.

Replacement Considerations

Microchip Technology 34AA02-I/ST