25LC320AT-E/ST16KVAO

Overview

The Microchip Technology 25LC320AT-E/ST16KVAO is a 32-Kbit (4096 x 8-bit) Serial Electrically Erasable PROM accessed via an SPI-compatible serial bus. It operates within a voltage range of 2.5V to 5.5V and supports a maximum clock frequency of 10 MHz at 5.5V. The device features low-power CMOS technology with standby current as low as 5 µA. It includes self-timed erase and write cycles with a maximum duration of 5 ms, block write protection for none, 1/4, 1/2, or all of the array, and built-in power-on/off data protection. The component is housed in an 8-lead TSSOP package and is qualified to AEC-Q100 standards.

Feature Summary

• Supports high-speed SPI communication with a maximum clock frequency of 10 MHz
• Includes hardware write-protect pin and software-configurable block protection levels
• Features built-in power-on/off data protection circuitry and write enable latch
• Provides hold functionality to pause serial transmission without resetting the sequence

Applications

• Microcontroller system data storage
• Industrial control applications requiring extended temperature operation
• Automotive electronics systems
• Embedded devices needing non-volatile parameter retention

Procurement Notes

Verify the specific suffix '16KVAO' against official Microchip documentation to confirm packaging and reel specifications. Ensure the Extended temperature grade (-40°C to +125°C) matches the application requirements. Confirm RoHS compliance status and automotive qualification details directly from the manufacturer's datasheet before procurement.

Selection Notes

Select this part for applications requiring 32-Kbit non-volatile storage with SPI interface compatibility. The Extended temperature grade (-40°C to +125°C) makes it suitable for harsh environments. Consider the 32-byte page size for write efficiency and verify that the 2.5V minimum supply voltage aligns with the system power rails.

Part Context

This component belongs to the 25XX320A family of 32-Kbit Serial EEPROMs from Microchip Technology. It shares functional similarities with the 25AA320A but differs in operating voltage range, supporting 2.5V to 5.5V compared to the 1.8V to 5.5V range of the AA variant. Both variants utilize the same 8-pin package options and instruction set.

Replacement Considerations

The 25LC320A-I/ST is a compatible Industrial temperature grade alternative. For broader voltage support including 1.8V, the 25AA320A series may be considered if temperature constraints allow.