24LC32A/P

Memory IC Overview

The Microchip Technology 24LC32A-I/P is a 32-Kbit Electrically Erasable PROM organized as 4K x 8-bit memory. It features a two-wire I2C compatible serial interface with a maximum clock frequency of 400 kHz for VCC between 2.5V and 5.5V, or 100 kHz below 2.5V. The device operates on a single supply voltage ranging from 2.5V to 5.5V. Key electrical parameters include a typical active current of 1 mA and standby current of 1 µA. It supports page writes of up to 32 bytes with a maximum write cycle time of 5 ms. The component is housed in an 8-lead PDIP package and is rated for industrial temperature operation from -40°C to +85°C.

Memory IC Feature Summary

• Supports bidirectional data transfer via a standard two-wire serial bus protocol.
• Includes hardware write protection controlled by the WP pin to inhibit array modifications.
• Features Schmitt trigger inputs on SDA and SCL lines for improved noise suppression.
• Provides output slope control to minimize ground bounce during switching.

Memory IC Applications

• Data acquisition systems requiring non-volatile storage for sampled signals
• Machine health monitoring applications for storing low-frequency signal characteristics
• Portable devices needing external memory expansion beyond internal MCU limits

Memory IC Procurement Notes

Verify that the specific ordering suffix matches the required temperature range and package type. Confirm the voltage operating range aligns with system requirements, noting that the 'LC' variant requires a minimum of 2.5V. Ensure compatibility with the host controller's I2C pull-up resistor values for the target clock speed. Check for any recent Product Change Notifications regarding packaging or manufacturing site updates.

Memory IC Selection Notes

Select this component when a 32-Kbit EEPROM capacity is sufficient for application needs. Choose the PDIP package for through-hole mounting requirements. Consider the 24AA32A variant if the design requires operation down to 1.7V. Evaluate the need for hardware write protection and acknowledge polling capabilities for bus efficiency. Ensure the microcontroller supports the required I2C timing specifications for 400 kHz operation.

Memory IC Part Context

This part belongs to the 24XX32A family of serial EEPROMs manufactured by Microchip Technology. The family includes variants like the 24AA32A which differ primarily in minimum operating voltage. These devices are designed for low-power applications and offer high endurance with over one million erase/write cycles. The series supports multiple devices on a single bus using functional address lines A0, A1, and A2.

Memory IC Replacement Considerations

The 24AA32A is a functionally similar device within the same family but operates at lower voltages (1.7V–5.5V). Other packages such as SOIC, MSOP, or TDFN may serve as physical replacements if pinout compatibility is maintained. Verify that any substitute maintains the 400 kHz clock speed and 32-byte page write buffer specifications.