25AA320A-I/P

Memory IC Overview

The Microchip Technology 25AA320A-I/P is a 32-Kbit (4096 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 5.5V. The device features low-power CMOS technology with a standby current of 5 µA and read/write currents up to 5 mA. It includes a 32-byte page buffer, self-timed erase/write cycles of 5 ms maximum, and block write protection. Endurance exceeds 1 million erase/write cycles with data retention over 200 years. It is housed in an 8-lead PDIP package and rated for industrial temperatures from -40°C to +85°C.

Memory IC Feature Summary

• Supports high-speed SPI communication with a maximum clock frequency of 10 MHz.
• Includes hardware write protection via the WP pin and software control through the STATUS register.
• Features a 32-byte page buffer for efficient sequential data writing operations.
• Provides power-on/off data protection circuitry and a write enable latch mechanism.

Memory IC Applications

• Data storage in microcontroller systems requiring non-volatile memory
• Configuration parameter storage in industrial equipment
• Calibration data retention in sensor interfaces

Memory IC Procurement Notes

Verify that the ordering suffix 'I' corresponds to the Industrial temperature range (-40°C to +85°C) and 'P' indicates the 8-lead PDIP package. Confirm the specific voltage range requirement matches the 25AA320A variant (1.8V to 5.5V), distinct from the 25LC320A (2.5V to 5.5V). Ensure compatibility with the host system's SPI interface levels and check for RoHS compliance status as specified in the manufacturer documentation.

Memory IC Selection Notes

Select this component when a 32-Kbit EEPROM with SPI interface is required for industrial applications. It is suitable for designs needing wide voltage operation down to 1.8V. Consider the 8-lead PDIP package for through-hole assembly requirements. Verify that the 10 MHz clock speed meets the system timing constraints and that the 32-byte page size aligns with the application's write granularity needs.

Memory IC Part Context

The 25AA320A is part of the 25XX320A family of 32-Kbit Serial EEPROMs manufactured by Microchip Technology. This family shares identical functional specifications but differs in operating voltage ranges; the 25AA320A supports 1.8V to 5.5V, while the 25LC320A supports 2.5V to 5.5V. Both variants offer similar performance characteristics including endurance, retention, and protection features.

Memory IC Replacement Considerations

The 25LC320A-I/P is a functionally equivalent alternative within the same family, differing primarily in its minimum operating voltage of 2.5V compared to the 25AA320A's 1.8V. Other compatible packages include MSOP, SOIC, TSSOP, and TDFN variants with corresponding suffixes.