25AA128-I/P

Memory IC Overview

The Microchip Technology 25AA128-I/P is a 128 Kbit (16,384 x 8-bit) Serial Electrically Erasable PROM accessed via an SPI-compatible serial bus. It operates within a supply voltage range of 1.8V to 5.5V and supports a maximum clock frequency of 10 MHz at higher voltages. The device features a 64-byte page size, self-timed erase/write cycles with a maximum duration of 5 ms, and industrial temperature ratings from -40°C to +85°C. It utilizes an 8-lead PDIP package.

Memory IC Feature Summary

• Supports high-speed serial communication with a maximum clock frequency of 10 MHz.
• Includes hardware write protection mechanisms such as a dedicated WP pin and software-controlled block protection bits.
• Features power-on/off data protection circuitry and a write enable latch to prevent inadvertent writes.
• Provides sequential read capability for continuous data retrieval.

Memory IC Applications

• Data storage in microcontroller systems requiring non-volatile memory
• Industrial control applications operating within specified temperature ranges
• Embedded systems needing configuration parameter retention

Memory IC Procurement Notes

Verify the specific ordering suffix 'I' corresponds to the Industrial temperature grade (-40°C to +85°C). Confirm the 'P' suffix indicates the 8-lead PDIP package type. Ensure the design requires the 1.8V minimum supply voltage characteristic unique to the 25AA series compared to other variants. Cross-reference the datasheet revision DS20001831F for accurate electrical specifications.

Memory IC Selection Notes

Select this component when an SPI interface is required for non-volatile data storage. The 1.8V minimum operating voltage distinguishes it from the 2.5V minimum 25LC128 variant. Consider the 64-byte page write limitation and the need for external write enable logic if system reliability against accidental writes is critical. Verify that the through-hole PDIP package fits the PCB layout constraints.

Memory IC Part Context

This part belongs to the 25XX128 family of 128 Kbit SPI EEPROMs manufactured by Microchip Technology. It shares functional similarities with the 25LC128 but differs in its lower minimum supply voltage requirement of 1.8V versus 2.5V. The family offers various package options including DFN, SOIC, and TSSOP, with the PDIP variant providing through-hole mounting capabilities.

Memory IC Replacement Considerations

The 25LC128-I/P is a functionally similar alternative within the same family, though it requires a minimum supply voltage of 2.5V instead of 1.8V. Other 128 Kbit SPI EEPROMs from different manufacturers may require level shifting or voltage adjustment due to differing I/O voltage tolerances.