25LC320A-I/P

Overview

The Microchip Technology 25LC320A-I/P is a 32-Kbit Serial Electrically Erasable PROM featuring a 4096 x 8-bit organization. It operates via an SPI-compatible serial bus with a maximum clock frequency of 10 MHz at VCC levels between 4.5V and 5.5V, reducing to 5 MHz at 2.5V–4.5V. The device supports a supply voltage range of 2.5V to 5.5V and utilizes an 8-lead PDIP package. Key electrical characteristics include a standby current of 5 µA at 5.5V and read/write currents up to 5 mA. It offers over 1 million erase/write cycles endurance and data retention exceeding 200 years.

Feature Summary

• Supports high-speed serial communication via SPI interface with hold functionality for interrupt servicing
• Includes hardware write protection mechanisms utilizing WP pin and STATUS register bits
• Features self-timed internal write cycles with automatic page boundary wrap-around handling
• Provides block-level write protection allowing selective array segment locking

Applications

• Microcontroller system data storage
• Industrial control parameter logging
• Automotive electronic configuration memory
• Consumer device calibration data retention

Procurement Notes

Verify the specific suffix 'I' confirms Industrial temperature range (-40°C to +85°C) and 'P' denotes the PDIP package. Confirm the datasheet revision matches the required specifications. Ensure compatibility with 2.5V to 5.5V supply rails. Check for RoHS compliance status in official documentation before finalizing procurement orders.

Selection Notes

Select this component when a 32-Kbit non-volatile memory solution is required with SPI interface compatibility. It is suitable for designs needing robust data retention and high endurance. Consider the PDIP package for through-hole mounting requirements. Verify that the 2.5V minimum operating voltage aligns with the system power architecture.

Part Context

This part belongs to the 25XX320A family of 32-Kbit SPI Serial EEPROMs from Microchip Technology. It shares architectural similarities with the 25AA320A but differs in minimum operating voltage requirements. The series utilizes PMOS technology for high density and reliability. It serves as a direct upgrade path for legacy 32-Kbit designs requiring higher speed performance.

Replacement Considerations

The 25LC320A-E/MS is a verified alternative offering Extended temperature range and MSOP packaging. Cross-reference pinouts and instruction sets for compatibility. Verify voltage level differences if substituting with lower voltage variants like the 25AA320A.