25C080/SN

Memory IC Overview

The Microchip Technology 25C080/SN is an 8 Kbit (1024 x 8-bit) Serial Electrically Erasable PROM housed in an 8-lead Plastic Small Outline (SOIC, 150 mil) package. It operates on a 4.5V to 5.5V supply voltage and supports a maximum clock frequency of 3 MHz. The device features low-power CMOS technology with typical standby current of 500 nA and read current of 500 µA. It includes hardware write protection via the WP pin and software block protection for none, 1/4, 1/2, or all of the array. Endurance is rated at 1 million cycles with data retention exceeding 200 years.

Memory IC Feature Summary

• Supports SPI-compatible serial bus communication with separate data input and output lines.
• Includes built-in power-on/off data protection circuitry and a write enable latch.
• Features a Hold pin to suspend transmission without resetting the serial sequence.
• Provides programmable block write protection for specific memory segments.

Memory IC Applications

• Microcontroller system data storage
• Configuration parameter storage
• Calibration data retention

Memory IC Procurement Notes

Verify that the design utilizes a 4.5V to 5.5V supply rail, as this device does not support lower voltages like 1.8V or 2.5V. Confirm the SOIC-8 package dimensions match the PCB footprint. Ensure the application requires the extended temperature range capabilities if operating near the upper limit. Check for updated replacement recommendations from the manufacturer.

Memory IC Selection Notes

Select this component when a 5V-only supply environment is present and high-speed SPI access up to 3 MHz is required. It is suitable for applications needing robust hardware write protection and long-term data retention. Consider alternative models if the system operates below 4.5V or requires industrial temperature ranges only.

Memory IC Part Context

This part belongs to the 25XX080 family of 8 Kbit Serial EEPROMs. It is specifically designed for 5.0V systems, distinguishing it from the 25AA080 (1.8V) and 25LC080 (2.5V) variants. The 'SN' suffix denotes the narrow SOIC package. The datasheet notes this series is not recommended for new designs.

Memory IC Replacement Considerations

• 25LC080/SN
• 25AA080/SN

Memory IC FAQ

What is the function of the HOLD pin?

The HOLD pin suspends serial communication without resetting the sequence. Inputs are ignored while held low, allowing the host to service interrupts.

How is the write enable latch managed?

The latch must be set via the WREN instruction before any write operation. It resets automatically after power-up, successful write, or WRDI instruction.