24LC025T-I/ST

Memory IC Overview

The Microchip Technology 24LC025T-I/ST is a 2 Kbit (256 x 8) serial Electrically Erasable PROM featuring an I2C-compatible 2-wire interface. It operates on a single supply voltage ranging from 2.5V to 5.5V and supports clock frequencies up to 400 kHz with a typical access time of 900 ns. The device utilizes low-power CMOS technology, offering typical standby current of 1 μA and active read current of 1 mA. It includes a 16-byte page write buffer, Schmitt trigger inputs for noise suppression, and output slope control to eliminate ground bounce. The component is housed in an 8-lead TSSOP package and is rated for industrial temperature operation between -40°C and +85°C.

Memory IC Feature Summary

• Supports cascading up to eight devices on the same bus using hardware address pins A0, A1, and A2 for contiguous memory expansion.
• Features a 16-byte page write buffer that allows multiple data bytes to be transmitted and stored before initiating the internal write cycle.
• Includes Schmitt trigger inputs and filter circuits on SCL and SDA lines to suppress noise spikes and ensure reliable operation on noisy buses.
• Provides hardware write protection capability via the WP pin, which disables write operations when tied to VCC.

Memory IC Applications

• Data logging applications requiring non-volatile storage of sensor readings or system parameters.
• Configuration storage for microcontroller-based systems where settings must persist after power loss.
• Calibration data retention for precision instruments and measurement devices.
• Identification and security code storage in consumer electronics and embedded systems.

Memory IC Procurement Notes

Verify the specific ordering suffix matches the required package type and temperature grade. Confirm that the 'T' suffix indicates tape and reel packaging if automated assembly is intended. Ensure the 'I' suffix corresponds to the industrial temperature range requirements of your application environment. Cross-reference the datasheet revision to confirm compatibility with your design specifications.

Memory IC Selection Notes

Select this component when a small, low-pin-count EEPROM is needed for I2C communication. It is suitable for designs operating within the 2.5V to 5.5V voltage range. Consider the 16-byte page buffer for efficient bulk writes. Note that unlike the 24LC024 variant, this device lacks a dedicated hardware write-protect pin, relying instead on software protocols for write protection.

Memory IC Part Context

This part belongs to the 24AA024/24LC024/24AA025/24LC025 family of 2 Kbit Serial EEPROMs. It shares functional similarities with the 24LC024 but differs in the absence of a hardware write-protect pin. The family offers various package options including PDIP, SOIC, TSSOP, DFN, and MSOP, catering to diverse PCB layout constraints and manufacturing preferences.

Memory IC Replacement Considerations

The 24LC024-I/ST is a direct physical and functional substitute, differing only by the inclusion of a hardware write-protect pin. Other 2 Kbit I2C EEPROMs from different manufacturers may require level shifting or protocol adjustments due to varying voltage ranges or timing specifications.