25LC080AT-I/SN

Overview

The Microchip Technology 25LC080AT-I/SN 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 at voltages between 4.5 V and 5.5 V, with reduced speeds at lower voltages. It utilizes a standard SPI-compatible interface and is housed in an 8-lead SOIC package.

Feature Summary

• Supports high-speed serial communication via a four-wire SPI compatible bus.
• Includes programmable block write protection for selective data security.
• Features built-in power-on/off data protection circuitry and a write enable latch.
• Provides a hold function to pause serial transmission without resetting the sequence.

Applications

• Data storage for microcontroller systems
• Configuration parameter retention
• Calibration value memory

Procurement Notes

Verify that the specific ordering suffix matches the required package type and temperature rating. Confirm the 'A' version designation aligns with the intended 16-byte page size requirement. Ensure the industrial temperature grade meets the operational environment specifications before finalizing procurement.

Selection Notes

Select this component when a low-pin-count non-volatile memory solution is required for small data sets. It is suitable for applications needing byte-level random access and moderate endurance. Consider the voltage compatibility with the host system's logic levels and the available SPI peripheral resources on the controller.

Part Context

This part belongs to the 25XX080A/B family of 8 Kbit EEPROMs from Microchip Technology. It shares functional similarities with other members of the series but differs in voltage range and page size depending on the specific letter code. The 'SN' suffix indicates the 8-lead Plastic Small Outline package format.

Replacement Considerations

Compatible substitutes include the 25AA080A-I/SN, which offers a wider voltage range starting at 1.8 V. Other variants like the 25LC080B-I/SN provide a larger 32-byte page size instead of 16 bytes. Verify pinout and instruction set compatibility before substitution.

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, it places inputs in a high-impedance state until pulled high again.

What is the purpose of the Write Enable Latch?

The Write Enable Latch must be set by issuing a WREN instruction before any write operations can occur. It resets automatically after power-up or upon completion of a write cycle to prevent inadvertent writes.