25AA080A-I/SN

Memory IC Overview

The Microchip Technology 25AA080A-I/SN is an 8 Kbit (1024 x 8-bit) Serial Electrically Erasable PROM. It features a 16-byte page size and operates on a standard SPI-compatible serial bus with SCK, SI, SO, and CS signals. The device supports a maximum clock frequency of 10 MHz at VCC levels between 4.5V and 5.5V. It functions within a supply voltage range of 1.8V to 5.5V and is housed in an 8-lead Plastic Small Outline (SOIC) package. The component is rated for industrial temperatures from -40°C to +85°C.

Memory IC Feature Summary

• Supports self-timed erase and write cycles with a maximum duration of 5 ms.
• Includes programmable block write protection allowing selection of none, one-quarter, one-half, or all array segments.
• Features built-in power-on/off data protection circuitry and a dedicated write enable latch.
• Provides a hold function to pause serial communication without resetting the sequence.

Memory IC Applications

• Direct interface with microcontrollers possessing a built-in synchronous serial port.
• Data storage applications requiring non-volatile memory retention exceeding 200 years.
• Systems utilizing discrete I/O lines programmed via software for serial communication.
• Industrial environments operating within the specified temperature range.

Memory IC Procurement Notes

Verify that the specific ordering suffix matches the required package type and temperature grade. Confirm the 'A' version designation corresponds to the 16-byte page size requirement rather than the 32-byte variant. Ensure the voltage range aligns with the system's 1.8V to 5.5V operational limits. Check datasheet revisions for any updates regarding pin configurations or electrical characteristics prior to finalizing procurement.

Memory IC Selection Notes

Select this component when an SPI interface is preferred over I2C protocols. Choose the 25AA080A series specifically if the application requires operation down to 1.8V, distinguishing it from the 2.5V minimum 25LC080A series. Consider the 8-lead SOIC package for surface mount assembly needs. Evaluate the 16-byte page size against write frequency requirements to optimize performance.

Memory IC Part Context

This device belongs to the 25XX080A/B family of 8 Kbit Serial EEPROMs manufactured by Microchip Technology. The family includes variants such as the 25LC080A and 25AA080B, which differ primarily in minimum operating voltage and page buffer size. The 25AA080A-I/SN represents the industrial-grade, low-voltage option packaged in a narrow SOIC format.

Memory IC Replacement Considerations

25AA080B-I/SN

Memory IC FAQ

How does the HOLD pin function during serial communication?

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

What determines the physical page boundary behavior during writes?

Page write operations are restricted to bytes within a single physical page. If a write crosses a boundary, data wraps around to the beginning of the current page instead of advancing to the next.

How is hardware write protection controlled?

Hardware write protection is enabled when the WP pin is low and the WPEN bit in the Status Register is high. This configuration disables writes to nonvolatile bits in the Status Register.