25AA320-I/P

Memory IC Overview

The Microchip Technology 25AA320-I/P is a 32 Kbit (4096 x 8 bit) serial Electrically Erasable PROM accessed via an SPI-compatible bus. It operates within a supply voltage range of 1.8V to 5.5V and supports a maximum clock frequency of 1 MHz. The device features self-timed erase and write cycles with a maximum duration of 5 ms. It includes block write protection, power-on data protection, and a dedicated write-protect pin. Designed for industrial applications, it functions reliably between -40°C and +85°C.

Memory IC Feature Summary

• Supports Serial Peripheral Interface (SPI) communication with separate data in and out lines.
• Includes hardware write protection via the WP pin and software control through the STATUS register.
• Features built-in power-on/off data protection circuitry and a write enable latch.

Memory IC Applications

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

Memory IC Procurement Notes

Verify that the specific part number matches the required package type, as this component is available in multiple formats including SOIC and TSSOP. Confirm the temperature grade corresponds to the intended operating environment. Ensure the design utilizes the correct SPI mode and timing parameters specified in the datasheet for reliable operation.

Memory IC Selection Notes

Select this component when a low-power, non-volatile memory solution is required for storing small amounts of data in industrial environments. Consider the 1 MHz speed limit and 1.8V minimum supply voltage. Note that newer designs may prefer the 25AA320A series for higher performance capabilities.

Memory IC Part Context

This device belongs to the 25XX320 family of serial EEPROMs from Microchip Technology. It shares architectural similarities with the 25LC320 and 25C320, differing primarily in supply voltage ranges and maximum clock frequencies. The 'I' suffix indicates an industrial temperature rating, while '/P' denotes the 8-pin PDIP package.

Memory IC Replacement Considerations

The datasheet explicitly states that this device is not recommended for new designs and suggests using the 25AA320A or 25LC320A instead. These newer variants offer increased clock speeds up to 10 MHz and support additional package types such as MSOP and TDFN.