24LC32AX-I/ST

Memory IC Overview

The Microchip Technology 24LC32AT-I/ST is a 32-Kbit Electrically Erasable PROM (EEPROM) organized as a single block of 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 for VCC below 2.5V. The device operates within a supply voltage range of 2.5V to 5.5V and supports an industrial temperature range of -40°C to +85°C. Key electrical parameters include a typical standby current of 1 µA and an access time of 900 ns at 2.5V ≤ VCC ≤ 5.5V.

Memory IC Feature Summary

• Supports page write operations with a 32-byte buffer to enhance bus throughput efficiency.
• Includes hardware write-protect functionality via the WP pin to secure data integrity.
• Features Schmitt trigger inputs on SDA and SCL pins to suppress noise spikes.

Memory IC Applications

• Personal communications devices requiring low-power non-volatile storage
• Data acquisition systems needing reliable parameter retention
• 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 the specific voltage range requirements align with the LC series specifications. Ensure compatibility with existing I2C bus pull-up resistor values for the target clock speed. Check for any recent Product Change Notifications regarding packaging or assembly sites.

Memory IC Selection Notes

Select this component when a 32-Kbit EEPROM capacity is required with I2C connectivity. The LC series is suitable for designs operating strictly above 2.5V; consider the AA series if operation down to 1.7V is necessary. Verify that the MSOP package dimensions fit the PCB layout constraints. Ensure the application does not require automotive qualification, as this specific part number falls under the Industrial temperature range.

Memory IC Part Context

This part belongs to the 24LC32A family of 32-Kbit Serial EEPROMs manufactured by Microchip Technology. It shares functional similarities with the 24AA32A but differs in minimum operating voltage. The family supports multiple packages including PDIP, SOIC, and MSOP, allowing flexibility in board design while maintaining standard I2C protocol compatibility across the series.

Memory IC Replacement Considerations

Direct replacements include other 24LC32A variants with different packages such as 24LC32AT-I/SN or 24LC32AT-I/P. Cross-series substitution with 24AA32AT-I/ST is possible only if the system voltage remains above 2.5V.