25LC320AT-E/SN16KVAO

Overview

The Microchip Technology 25LC320AT-E/SN16KVAO is a 32-Kbit Serial Electrically Erasable PROM featuring a 4096 x 8-bit organization. It operates on a 2.5V to 5.5V supply voltage and supports a maximum clock frequency of 10 MHz via an SPI-compatible serial bus. The device includes a 32-byte page buffer, self-timed erase/write cycles with a maximum duration of 5 ms, and block write protection capabilities. It is designed for extended temperature ranges from -40°C to +125°C and is housed in an 8-lead SOIC package.

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 power-on/off data protection circuitry and a write enable latch to prevent inadvertent writes
• Provides sequential read capability with automatic address pointer incrementation

Applications

• Data storage in microcontroller-based systems requiring non-volatile memory
• Configuration parameter storage in industrial control applications
• Calibration data retention in sensor interfaces
• Device identification and security code storage in embedded systems

Procurement Notes

Verify that the specific suffix '16KVAO' aligns with official Microchip documentation regarding marking or packaging variations. Confirm the 'E' temperature grade corresponds to the required -40°C to +125°C operational range. Ensure the SOIC package type matches the design footprint. Cross-reference the datasheet revision DS20001828H for any recent changes to electrical characteristics or pin definitions before finalizing procurement.

Selection Notes

Select this component when a 32-Kbit EEPROM with SPI interface is required for designs operating between 2.5V and 5.5V. The Extended temperature grade (-40°C to +125°C) makes it suitable for harsh environments. Consider the 10 MHz clock speed for high-throughput applications. Verify that the 32-byte page size fits the application's write granularity requirements and that the 8-pin SOIC package is compatible with the PCB layout constraints.

Part Context

This part belongs to the 25LC320A family of 32-Kbit Serial EEPROMs manufactured by Microchip Technology. It shares functional similarities with the 25AA320A but differs in supply voltage requirements, supporting a minimum of 2.5V compared to the AA variant's 1.8V. The family utilizes a standard 8-pin SPI interface and offers various package options including MSOP, PDIP, SOIC, TDFN, and TSSOP.

Replacement Considerations

Public confirmed substitute part numbers: None identified in source material.