25AA080AT-I/SN

Memory IC Overview

The Microchip Technology 25AA080AT-I/SN is an 8 Kbit Serial Electrically Erasable PROM featuring a 1024 x 8-bit organization. It utilizes a standard SPI-compatible serial bus with SCK, SI, SO, and CS signals for communication. The device supports a maximum clock frequency of 10 MHz and operates within a supply voltage range of 1.8 V to 5.5 V. It includes a 16-byte page write buffer and self-timed erase/write cycles with a maximum duration of 5 ms. The component is housed in an 8-lead SOIC package and is rated for industrial temperatures from -40 °C to +85 °C.

Memory IC Feature Summary

• Supports high-speed synchronous serial communication via a standard SPI interface with hold functionality for interrupt servicing.
• Includes built-in hardware and software write protection mechanisms, such as block protection and power-on data protection circuitry.
• Features non-volatile memory architecture ensuring long-term data retention and high endurance against repeated write cycles.

Memory IC Applications

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

Memory IC Procurement Notes

Verify the specific suffix 'I' confirms the industrial temperature range (-40°C to +85°C) and 'SN' denotes the 8-lead SOIC package. Confirm the 'A' version designation indicates the 16-byte page size rather than the 32-byte variant found in 'B' versions. Ensure the ordering code matches the required RoHS compliance and Pb-free status specified in the manufacturer documentation.

Memory IC Selection Notes

Select this component when an SPI interface is preferred over I2C for system compatibility. Choose the 25AA080AT series specifically for low-voltage operation starting at 1.8 V, distinguishing it from the 25LC080 which requires a minimum of 2.5 V. The 'T' suffix indicates tape and reel packaging suitable for automated surface-mount assembly processes.

Memory IC Part Context

This part belongs to the 25XX080 family of 8 Kbit Serial EEPROMs manufactured by Microchip Technology. It shares functional similarities with the 25LC080 but differs in operating voltage requirements. The family supports multiple package types including PDIP, SOIC, MSOP, and TSSOP, providing flexibility for various PCB layout constraints and density requirements.

Memory IC Replacement Considerations

Direct substitutes include the 25AA080A-I/SN (non-reel) and 25LC080A-I/SN (if voltage permits). Verify that alternative packages like MSOP or TSSOP maintain pinout compatibility if form factor changes are acceptable.

Memory IC FAQ

How does the HOLD pin function during serial communication?

The HOLD pin allows the host to pause serial communication without resetting the sequence. When pulled low while SCK is low, inputs are ignored except for Chip Select, allowing higher priority interrupts to be serviced before resuming.

What is the difference between the 25AA080A and 25AA080B versions?

The primary difference is the page size. The 25AA080A version supports a 16-byte page size, whereas the 25AA080B version supports a 32-byte page size. Both share the same interface and electrical characteristics.

Can the device be written to while a write cycle is in progress?

No. Access to the memory array is ignored during an internal write cycle. The Status Register can be read to check the Write-In-Process (WIP) bit to determine if the device is busy.