25LC320AT-H/SN

Overview

The Microchip Technology 25LC320AT-H/SN is a 32Kbit (4,096 x 8) Serial Electrically Erasable PROM utilizing SPI-compatible architecture. It operates within a voltage range of 2.5V to 5.5V and supports a maximum clock frequency of 5 MHz at voltages between 4.5V and 5.5V, or 3 MHz at 2.5V to less than 4.5V. The device features a page size of 32 bytes and an internal write cycle time of up to 6 ms. It is housed in an 8-lead SOIC package and is rated for an extended temperature range from -40°C to +150°C.

Feature Summary

• Supports block-level write protection allowing selection of none, one-quarter, one-half, or all array segments.
• Includes hardware write-protect functionality controlled by the WP pin and STATUS register bits.
• Features a HOLD input to suspend serial communication without resetting the sequence.

Applications

• Embedded systems requiring non-volatile data storage under high thermal stress
• Industrial control units with extended operational temperature requirements
• Automotive electronics compliant with AEC-Q100 reliability standards

Procurement Notes

Verify that the ordering suffix 'H' corresponds to the extended temperature grade (-40°C to +150°C) and 'SN' indicates the 8-lead SOIC package. Confirm the presence of the 'T' suffix for tape-and-reel packaging if applicable. Ensure compatibility with the 2.5V to 5.5V supply range and SPI interface timing requirements before integration.

Selection Notes

Select this component when designs require EEPROM density up to 32Kbits with operation extending to +150°C ambient temperatures. It is suitable for applications needing hardware write protection via the WP pin and support for page-level write operations. Verify that the system voltage remains within the specified 2.5V to 5.5V range to ensure proper clock frequency performance.

Part Context

This part belongs to the 25LCXXX family of mid-density serial EEPROMs manufactured by Microchip Technology. These devices are designed for direct interfacing with SPI ports of microcontrollers. The specific model integrates high-temperature capabilities and robust data retention characteristics suitable for demanding industrial and automotive environments.

Replacement Considerations

Compatible substitutes include other members of the 25LC320A family such as 25LC320AT-I/SN or 25LC320AT-E/SN, provided the temperature range requirements align with the design specifications.