24LC32A-I/SN

Memory IC Overview

The Microchip Technology 24LC32A-I/SN is a 32-Kbit Electrically Erasable PROM (EEPROM) organized as a single block of 4K x 8-bit memory. It features a two-wire serial interface compatible with I2C protocols, supporting clock frequencies up to 400 kHz for VCC between 2.5V and 5.5V. The device operates within an industrial temperature range of -40°C to +85°C and utilizes an 8-lead SOIC package.

Memory IC Feature Summary

• Supports page write operations with a 32-byte buffer to enhance bus throughput efficiency.
• Includes hardware write protection via the WP pin to inhibit array modifications when tied high.
• Features Schmitt trigger inputs on SDA and SCL lines to suppress noise spikes and eliminate ground bounce.

Memory IC Applications

• Data acquisition systems requiring non-volatile storage
• Personal communications devices needing low-power memory
• Industrial control applications utilizing I2C bus architectures

Memory IC Procurement Notes

Verify that the ordering suffix matches the required package type and temperature grade. Confirm voltage specifications align with system requirements, as the LC variant requires a minimum supply of 2.5V. Ensure compatibility with existing I2C bus pull-up resistor values for the target clock frequency.

Memory IC Selection Notes

Select this component for applications requiring robust data retention exceeding 200 years and endurance over one million erase/write cycles. Consider the 8-lead SOIC package for surface mount assembly needs. Verify that the system voltage remains above 2.5V to ensure full 400 kHz clock speed operation without degradation to 100 kHz.

Memory IC Part Context

This part belongs to the 24AA32A/24LC32A family of 32-Kbit I2C Serial EEPROMs. The 'LC' designation indicates a specific voltage operating range starting at 2.5V, distinguishing it from the 'AA' series which supports lower voltages down to 1.7V. Both share identical memory organization and interface protocols.

Memory IC Replacement Considerations

The 24AA32A-I/SN serves as a functional substitute within the same package, offering broader voltage compatibility down to 1.7V. Other variants in the 24XX32A family may be considered if different package types or extended temperature ranges are required.

Memory IC FAQ

How does the hardware write-protect feature function?

Tying the WP pin to VCC inhibits all write operations to the array, while tying it to VSS enables them. Read operations remain unaffected regardless of the WP pin state.

What is the maximum data transfer rate supported?

The device supports a maximum clock frequency of 400 kHz when the supply voltage is between 2.5V and 5.5V.