25LC080A-E/ST

Overview

The Microchip Technology 25LC080A-E/ST is an 8 Kbit (1024 x 8-bit) Serial Electrically Erasable PROM. It features a 16-byte page size and operates within a supply voltage range of 2.5 V to 5.5 V. The device supports a maximum clock frequency of 10 MHz via a standard SPI-compatible serial bus. It is housed in an 8-lead TSSOP package and is rated for an industrial temperature range of -40°C to +125°C.

Feature Summary

• Supports high-speed synchronous serial communication through a four-wire SPI compatible interface with separate data input and output lines.
• Includes programmable block write protection allowing selective protection of none, one-quarter, one-half, or the entire memory array.
• Features built-in power-on/off data protection circuitry combined with a write enable latch to prevent inadvertent writes.
• Provides a hold function that suspends serial transmission without resetting the sequence, enabling host interruption handling.

Applications

• Microcontroller system configuration storage
• Calibration parameter persistence
• Data logging applications

Procurement Notes

Verify the specific suffix 'E' indicates automotive grade qualification (-40°C to +125°C). Confirm the 'ST' suffix corresponds to the 8-lead TSSOP package. Ensure the design utilizes the correct 16-byte page write limits for the 'A' version device.

Selection Notes

Select this component when an 8 Kbit non-volatile memory solution is required with SPI interface compatibility. The automotive temperature rating makes it suitable for harsh environments. Verify that the 2.5 V minimum operating voltage aligns with the system's power rails.

Part Context

This part belongs to the 25LC080A/B family of 8 Kbit Serial EEPROMs. The 'A' designation specifies a 16-byte page size, distinguishing it from the 'B' version which offers a 32-byte page size. It shares the same pinout and instruction set as other variants in the series.

Replacement Considerations

25LC080B-E/ST

FAQ

How does the HOLD pin function during operation?

The HOLD pin allows the user to pause serial communication without resetting the sequence. When pulled low while SCK is low, the SI, SCK, and SO pins enter a high-impedance state until the pin is released.

What is the purpose of the Write Enable Latch?

The Write Enable Latch must be set before any write operation can be completed. It resets automatically upon power-up, after a successful write, or when a WRDI instruction is executed.