25LC080B-I/ST

Overview

The Microchip Technology 25LC080B-I/ST is an 8 Kbit (1024 x 8) Serial Electrically Erasable PROM utilizing a standard SPI-compatible interface. It supports a maximum clock frequency of 10 MHz and operates within a supply voltage range of 2.5V to 5.5V. The device features a 32-byte page size, self-timed write cycles with a maximum duration of 5 ms, and industrial temperature ratings from -40°C to +85°C. It is housed in an 8-lead TSSOP package.

Feature Summary

• Supports 32-byte page writes for efficient data storage operations
• Includes programmable block write protection for array security
• Features hardware hold capability to pause serial communication without resetting the sequence

Applications

• Microcontroller system configuration storage
• Calibration parameter retention
• Embedded application data logging

Procurement Notes

Verify that the specific suffix 'I' corresponds to the Industrial temperature range (-40°C to +85°C) and 'ST' indicates the 8-lead TSSOP package. Confirm the 'B' variant designation aligns with the required 32-byte page size rather than the 16-byte 'A' version. Ensure compatibility with the target system's SPI voltage levels and pinout requirements before finalizing procurement.

Selection Notes

Select this component when a 32-byte page buffer is preferred over the 16-byte alternative found in the 'A' series. The Industrial grade rating makes it suitable for broader environmental conditions compared to commercial variants. Verify that the 2.5V minimum operating voltage meets the lowest supply rail available in the design architecture.

Part Context

This part belongs to the 25LC080A/B family of 8Kb SPI EEPROMs manufactured by Microchip Technology. The 'B' suffix specifically denotes devices with a 32-byte page size, distinguishing them from the 16-byte 'A' series. The 'I' suffix identifies the Industrial temperature range, while 'ST' specifies the Thin Shrink Small Outline Package.

Replacement Considerations

25LC080A-I/ST

FAQ

How does the HOLD pin function during operation?

The HOLD pin allows the user to suspend transmission to the device mid-sequence without resetting the serial pointer. It must be pulled low while SCK is low to pause communication and brought high to resume.

What is the difference between the 25LC080A and 25LC080B page sizes?

The 25LC080B supports a 32-byte page size, whereas the 25LC080A supports a 16-byte page size. Both share the same 8 Kbit capacity and SPI interface.