25LC080AT-I/ST

Overview

The Microchip Technology 25LC080AT-I/ST is an 8 Kbit (1024 x 8-bit) Serial Electrically Erasable PROM. It utilizes a low-power CMOS technology and interfaces via a standard SPI-compatible serial bus with a maximum clock frequency of 10 MHz. The device features a 16-byte page size, self-timed erase and write cycles with a maximum duration of 5 ms, and supports sequential read operations. It operates within a supply voltage range of 2.5 V to 5.5 V and includes built-in write protection mechanisms such as a write enable latch and hardware write-protect pin. The component is housed in an 8-lead TSSOP package and is rated for industrial temperature ranges.

Feature Summary

• Supports high-speed SPI communication with up to 10 MHz clock frequency
• Includes programmable block write protection for array segments
• Features 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
• Configuration parameter retention
• Calibration value storage

Procurement Notes

Verify that the specific ordering suffix matches the required package type and temperature grade. Confirm the 'A' version designation aligns with the 16-byte page size requirement. Ensure the industrial temperature rating meets the operational environment specifications. Check for RoHS compliance status if required by assembly standards.

Selection Notes

Select this component when an SPI interface is preferred over I2C or Microwire protocols. Choose this part for applications requiring robust hardware write protection features. Consider the 16-byte page size limitation for write operations when designing memory management software. Verify voltage compatibility with the host microcontroller logic levels.

Part Context

This device belongs to the 25LC080 family of 8 Kbit Serial EEPROMs from Microchip Technology. It shares functional similarities with the 25AA080 series but differs in minimum operating voltage requirements. The 'I' suffix indicates an industrial temperature range, while the 'ST' suffix denotes the 8-lead TSSOP package configuration.

Replacement Considerations

Direct substitutes include other 25LC080 variants with different package options such as MSOP or SOIC. Cross-family replacements like the 25AA080 may be considered if lower voltage operation is needed.