24AA32AF-I/ST

Memory IC Overview

The Microchip Technology 24AA32AF-I/ST is a 32-Kbit Electrically Erasable PROM organized as a single block of 4K x 8-bit memory. It operates with a single supply voltage ranging from 1.7V to 5.5V and supports I2C compatible two-wire serial interfaces at clock frequencies up to 400 kHz (or 100 kHz when VCC is below 2.5V). The device features a 32-byte page write buffer, hardware write-protect for the upper quarter of the array, and Schmitt trigger inputs for noise suppression. It is housed in an 8-lead TSSOP package and functions within an industrial temperature range of -40°C to +85°C.

Memory IC Feature Summary

• Hardware write-protect capability for the upper quarter of the memory array
• Low-power CMOS technology with standby current of 1 µA maximum
• Supports cascading up to eight devices on the same bus via functional address pins
• Includes output slope control to eliminate ground bounce

Memory IC Applications

• Personal communications systems requiring low power consumption
• Data acquisition applications needing non-volatile storage
• Embedded systems utilizing I2C serial interfaces
• Devices requiring hardware-level protection for specific memory sections

Memory IC Procurement Notes

Verify that the ordering suffix matches the required package type and temperature grade. Confirm the specific variant corresponds to the 24AA32AF series which supports operation down to 1.7V. Ensure compatibility with the intended I2C bus speed relative to the operating voltage. Check for RoHS compliance status if required by the manufacturing process.

Memory IC Selection Notes

Select this component for designs requiring a 32-Kbit EEPROM with a dedicated hardware write-protect feature for the upper memory quarter. It is suitable for low-voltage applications operating down to 1.7V. Consider the 8-lead TSSOP package for surface mount requirements. Ensure the system design accommodates the 32-byte page write buffer limitations and I2C bus timing constraints.

Memory IC Part Context

This part belongs to the 24XX32AF family of 32-Kbit I2C Serial EEPROMs. It shares architectural similarities with the standard 24AA32A but includes enhanced write-protect functionality. The 'I' designation indicates an industrial temperature range, while 'ST' specifies the 8-lead TSSOP package. It is designed for advanced low-power applications compared to older generations.

Memory IC Replacement Considerations

The 24LC32AF-I/ST is a compatible alternative within the same family, though it requires a minimum supply voltage of 2.5V instead of 1.7V. Verify voltage headroom before substitution. Other 24AA32 variants without the 'F' suffix lack the quarter-array hardware write-protect feature.