34AA02-I/P

Overview

The Microchip Technology 34AA02-I/P is a 2 Kbit (256 x 8) Electrically Erasable PROM featuring a 2-Wire I²C compatible serial interface. It operates on a single supply voltage ranging from 1.7V to 5.5V, with a maximum clock frequency of 400 kHz for the Industrial temperature grade (-40°C to +85°C). The device supports page writes up to 16 bytes and includes permanent and resettable software write-protect features for the lower half of the array, alongside hardware protection via the WP pin.

Feature Summary

• Features permanent and resettable software write-protect capabilities for the lower half of the memory array, complemented by an external hardware write-protect pin for full array protection.
• Supports bidirectional 2-wire serial communication with Schmitt trigger inputs and output slope control to ensure noise suppression and eliminate ground bounce.
• Incorporates self-timed erase/write cycles with acknowledge polling functionality to maximize bus throughput during internal programming operations.

Applications

• Systems requiring low-voltage non-volatile data storage with hardware-level security constraints
• Industrial control applications utilizing standard I²C bus architectures
• Embedded devices needing configurable write-protection for critical configuration parameters

Procurement Notes

Verify that the specific ordering suffix corresponds to the PDIP-8 package type, as the 34AA02 series is available in multiple form factors including SOIC, TSSOP, MSOP, and TDFN. Confirm the 'I' designation matches the required industrial temperature range specifications for your operational environment before finalizing procurement.

Selection Notes

Select this component when a 2 Kbit capacity is sufficient and operation down to 1.7V is required. Ensure the system design accommodates the 400 kHz maximum clock speed at the target supply voltage. Consider the availability of the PDIP package if through-hole mounting is necessary for the specific application board layout.

Part Context

This part belongs to the 34AA02/34LC02 family of 2 Kbit serial EEPROMs manufactured by Microchip Technology. While functionally similar to the 34LC02 variant, the 34AA02 supports a wider voltage range starting at 1.7V compared to the 34LC02's 2.2V minimum. The 'I/P' suffix specifically denotes the Industrial temperature grade and PDIP-8 packaging.

Replacement Considerations

The 34LC02 serves as a functional substitute within the same datasheet specification, though it requires a minimum supply voltage of 2.2V rather than 1.7V. Verify that the replacement package type matches the existing PCB footprint requirements.