25LC080A-I/P

Overview

The Microchip Technology 25LC080A-I/P is an 8 Kbit (1024 x 8-bit) Serial Electrically Erasable PROM featuring a 16-byte page size. It operates within a supply voltage range of 2.5 V to 5.5 V and supports a maximum clock frequency of 10 MHz via a standard SPI-compatible interface. The device utilizes low-power CMOS technology, offering high reliability with over 1,000,000 erase/write cycles and data retention exceeding 200 years. It is housed in an 8-lead PDIP package and functions reliably across an industrial temperature range of -40 °C to +85 °C.

Feature Summary

• Supports serial communication through a four-wire SPI-compatible bus including 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 pauses serial communication without resetting the sequence, enabling host interrupt servicing.

Applications

• Data storage for configuration parameters in microcontroller-based systems
• Logging operational history or event records in embedded devices
• Storing calibration constants and device-specific identifiers

Procurement Notes

Verify the specific suffix 'I' confirms the industrial temperature range (-40 °C to +85 °C) and 'P' indicates the 8-lead PDIP package. Confirm RoHS compliance and lead-free status as specified in the datasheet. Ensure the ordering part number matches the exact 'A' version requirements for the 16-byte page size structure.

Selection Notes

Select this component when a non-volatile memory solution requires a simple SPI interface and robust write protection features. It is suitable for applications needing moderate speed up to 10 MHz and high endurance. Consider alternative packages like MSOP or TSSOP if surface-mount assembly is required instead of through-hole mounting.

Part Context

This device belongs to the 25XX080A/B family of 8 Kbit Serial EEPROMs manufactured by Microchip Technology. The 'LC' designation specifically denotes operation at a minimum supply voltage of 2.5 V, distinguishing it from the 'AA' variant which supports lower voltages down to 1.8 V. All variants share identical pinouts and core functionality.

Replacement Considerations

Direct functional substitutes within the same package include the 25LC080B-I/P, which offers a 32-byte page size instead of 16 bytes. Other compatible options are the 25AA080A-I/P for lower voltage applications or the 25LC080D-E/P for extended temperature ranges, provided interface and voltage specifications align.

FAQ

How does the HOLD pin function during serial communication?

The HOLD pin allows the user to pause transmission to the device mid-sequence without resetting the serial pointer. When pulled low while SCK is low, inputs are ignored until the pin is raised high again.

What is the purpose of the Write Enable Latch?

The Write Enable Latch must be set via the WREN instruction before any write operation can occur. It resets automatically after power-up, successful write completion, or execution of the WRDI instruction to prevent accidental data corruption.