24AA32AT-I/SM

Memory IC Overview

The Microchip Technology 24AA32AT-I/SM is a 32-Kbit Electrically Erasable PROM organized as a single block of 4K x 8-bit memory. It operates on a single supply voltage ranging from 1.7V to 5.5V with a maximum clock frequency of 400 kHz (100 kHz for VCC < 2.5V). The device features typical standby current of 1 µA and active current of 1 mA. It supports industrial temperature range (-40°C to +85°C) and is housed in an 8-lead MSOP package.

Memory IC Feature Summary

• Supports bidirectional two-wire serial interface compatible with I2C protocol
• Includes hardware write-protect capability via the WP pin
• Features Schmitt trigger inputs for noise suppression and output slope control

Memory IC Applications

• Personal communications devices
• Data acquisition systems
• Advanced low-power applications

Memory IC Procurement Notes

Verify that the ordering suffix 'T' corresponds to tape and reel packaging, distinct from tube packaging. Confirm the 'I' suffix indicates the Industrial temperature range (-40°C to +85°C). Ensure the 'SM' suffix matches the required 8-lead MSOP surface mount package type for your PCB layout.

Memory IC Selection Notes

Select this component for designs requiring low-voltage operation down to 1.7V. It is suitable for systems needing up to eight devices on a single bus using functional address lines A0-A2. Consider the 32-byte page write buffer for efficient data writing compared to byte-write operations.

Memory IC Part Context

This part belongs to the 24XX32A family of 32-Kbit Serial EEPROMs. It shares architectural similarities with the 24LC32A but differs in minimum operating voltage (1.7V vs 2.5V). The family supports multiple packages including SOIC, TSSOP, and DFN variants.

Memory IC Replacement Considerations

The 24LC32A is a direct functional substitute within the same family, though it requires a minimum supply voltage of 2.5V instead of 1.7V. Other 24AA32A variants with different package suffixes (e.g., SN for SOIC, ST for TSSOP) are pin-compatible alternatives.

Memory IC FAQ

How does the WP pin function?

The WP pin enables hardware write protection. When tied to VCC, write operations are inhibited while read operations remain unaffected. When tied to VSS, write protection is disabled.

What is the maximum page write size?

The device supports a page write capability for up to 32 bytes of data. If more than 32 bytes are transmitted before a Stop condition, the address pointer rolls over and overwrites previous data in the page.