24LC32AT-I/ST

Memory IC Overview

The Microchip Technology 24LC32AT-I/ST is a 32-Kbit Electrically Erasable PROM organized as a single block of 4K x 8-bit memory. It operates with a supply voltage range of 2.5V to 5.5V and supports I2C compatible two-wire serial interfaces at clock frequencies up to 400 kHz. The device features a 32-byte page write buffer, self-timed erase/write cycles with a maximum duration of 5 ms, and an access time of 900 ns. It is housed in an 8-lead TSSOP package and functions within an industrial temperature range of -40°C to +85°C.

Memory IC Feature Summary

• Supports bidirectional two-wire serial communication via SDA and SCL pins for efficient data transfer.
• Includes hardware write protection controlled by the WP pin to prevent unintended data modification.
• Features Schmitt trigger inputs on all pins to suppress noise spikes and ensure signal integrity.
• Provides output slope control to eliminate ground bounce during high-speed switching operations.

Memory IC Applications

• Storing configuration parameters in embedded systems
• Recording firmware versioning or calibration data
• Temporary data storage in low-power consumer electronics

Memory IC Procurement Notes

Verify that the ordering suffix 'I' corresponds to the Industrial temperature range (-40°C to +85°C) and 'ST' indicates the 8-lead TSSOP package. Confirm the specific voltage requirements align with the 2.5V minimum operating limit for the LC series. Ensure compatibility with the host controller's I2C pull-up resistor values for the target clock frequency.

Memory IC Selection Notes

Select this component when a non-volatile memory solution requires a 32-Kbit capacity with standard I2C connectivity. It is suitable for applications needing hardware write protection and robust noise immunity through Schmitt triggers. Consider the 8-lead TSSOP package for surface-mount assembly constraints and verify that the 2.5V to 5.5V supply range matches the system power architecture.

Memory IC Part Context

This part belongs to the 24XX32A family of 32-Kbit serial EEPROMs from Microchip Technology. The family includes variants like the 24AA32A which supports lower voltages down to 1.7V. The 24LC32A specifically targets applications requiring operation between 2.5V and 5.5V. The 'T' suffix typically denotes tape and reel packaging, while 'I' specifies the industrial temperature grade.

Memory IC Replacement Considerations

Direct substitutes include other 24LC32A variants with different packages such as 24LC32AT-I/MS (MSOP) or 24LC32A-I/P (PDIP). Cross-family replacements like the 24AA32AT-I/ST are possible if the system voltage supports the 1.7V lower limit, offering broader voltage compatibility.

Memory IC FAQ

How does the WP pin function affect write operations?

When the WP pin is tied to VCC, write operations are inhibited, protecting the entire array from modification. Read operations remain unaffected. When tied to VSS, write protection is disabled, allowing normal read and write cycles.

What is the maximum page write size for this device?

The device supports a page write capability of up to 32 bytes. If a write command attempts to cross a physical page boundary, the data wraps around to the beginning of the current page rather than proceeding to the next page.