25AA040A-I/P

Memory IC Overview

The Microchip Technology 25AA040A-I/P is a 4 Kbit (512 x 8) Serial Electrically Erasable Programmable Read-Only Memory (EEPROM). It operates within a supply voltage range of 1.8V to 5.5V and supports a maximum clock frequency of 10 MHz via an SPI-compatible serial bus. The device features a write page mode for up to 16 bytes, self-timed erase and write cycles with a maximum duration of 5 ms, and block write protection capabilities. It is housed in an 8-lead PDIP package and is rated for industrial temperature ranges from -40°C to +85°C.

Memory IC Feature Summary

• Supports low-power CMOS technology with standby current as low as 5 µA at 5.5V.
• Includes built-in write protection mechanisms such as power-on/off data protection, a write enable latch, and a dedicated write-protect pin.
• Offers high reliability with endurance of 1,000,000 erase/write cycles and data retention exceeding 200 years.

Memory IC Applications

• Storing critical parameters or device configuration data in microcontroller systems.
• Recording equipment serial numbers or status flags in embedded applications.
• Data logging tasks requiring non-volatile memory access via SPI interfaces.

Memory IC Procurement Notes

Verify the specific ordering suffix 'I/P' corresponds to the Industrial temperature grade (-40°C to +85°C) and the 8-lead PDIP package type. Confirm that the 1.8V to 5.5V operating voltage range aligns with your system's power supply requirements before procurement.

Memory IC Selection Notes

Select this component when a 4 Kbit EEPROM with SPI interface is required for industrial environments. Ensure the design accommodates the 1.8V minimum supply voltage, distinguishing it from variants like the 25LC040A which require a higher minimum voltage. Verify that the through-hole PDIP package fits the PCB layout constraints.

Memory IC Part Context

This part belongs to the 25XX040A family of 4 Kbit Serial EEPROMs manufactured by Microchip Technology. It shares functional similarities with the 25LC040A but differs primarily in its lower minimum operating voltage specification. The 'I' designation indicates compliance with industrial temperature standards.

Memory IC Replacement Considerations

Direct substitutes include other 25AA040A variants with different packages (e.g., SOIC, MSOP) or the 25LC040A series if the system voltage exceeds 2.5V. Verify package compatibility and voltage specifications when cross-referencing.