24AA32A-I/ST

Memory IC Overview

The Microchip Technology 24AA32A-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 a maximum clock frequency of 400 kHz for VCC ≥ 2.5V, or 100 kHz for VCC < 2.5V. The device features an I²C compatible two-wire serial interface, a 32-byte page write buffer, and hardware write protection via the WP pin. It is available in an 8-lead TSSOP package and functions within an industrial temperature range of -40°C to +85°C.

Memory IC Feature Summary

• Supports low-voltage operation down to 1.7V with typical standby current of 1 µA.
• Includes a 32-byte page write buffer to enhance bus throughput efficiency.
• Provides hardware write protection through the dedicated WP pin input.
• Features Schmitt trigger inputs on SDA and SCL lines for improved noise suppression.

Memory IC Applications

• Personal communications devices requiring non-volatile data storage
• Data acquisition systems needing reliable parameter retention
• Embedded controllers utilizing I²C bus architecture

Memory IC Procurement Notes

Verify that the ordering suffix matches the required package type (TSSOP) and temperature grade (Industrial). Confirm the specific revision level against the manufacturer's latest datasheet to ensure compatibility with system voltage requirements. Check for RoHS compliance status if environmental regulations apply to the final assembly process.

Memory IC Selection Notes

Select this component when a 32-Kbit EEPROM with I²C interface is required for low-power applications. Ensure the system voltage remains above 1.7V for full 400 kHz speed; otherwise, clock rates must be reduced to 100 kHz. Verify that the 8-pin TSSOP footprint fits the PCB layout constraints and that the industrial temperature range meets operational environmental standards.

Memory IC Part Context

This part belongs to the 24XX32A family of serial EEPROMs manufactured by Microchip Technology. The family includes variants like the 24LC32A, which differs primarily in minimum operating voltage. The 24AA32A series is designed for advanced low-power applications and offers multiple package options including SOIC, MSOP, and DFN alongside the TSSOP variant.

Memory IC Replacement Considerations

The 24LC32A is a functional equivalent within the same family but requires a minimum supply voltage of 2.5V compared to the 24AA32A's 1.7V minimum. Ensure voltage levels are compatible before substitution.