24AA16T-E/ST

Memory IC Overview

The Microchip Technology 24AA16T-E/ST is a 16-Kbit Electrically Erasable PROM organized as eight blocks of 256 x 8-bit memory. It operates on a single supply voltage ranging from 1.7V to 5.5V and supports a maximum clock frequency of 400 kHz at voltages above 2.5V, or 100 kHz below 2.5V. The device utilizes low-power CMOS technology with standby current of 1 μA (max) and read current of 1 mA (max). It features an I²C compatible two-wire serial interface, hardware write-protect capability, and a 16-byte page write buffer. The extended temperature grade (-E) ensures operation from -40°C to +125°C.

Memory IC Feature Summary

• Supports bidirectional data transfer via an I²C compatible two-wire serial bus protocol
• Includes Schmitt trigger inputs and filter circuits for noise suppression on SDA and SCL lines
• Features hardware write protection controlled by the WP pin to inhibit array writes
• Provides self-timed erase/write cycles with automatic acknowledge polling support

Memory IC Applications

• Data logging in industrial control systems
• Configuration storage for embedded microcontrollers
• Parameter retention in consumer electronics devices

Memory IC Procurement Notes

Verify that the ordering suffix 'ST' corresponds to the 8-Lead TSSOP package type required for your PCB layout. Confirm the 'E' suffix indicates the Extended temperature range (-40°C to +125°C) rather than Industrial grade. Ensure the design accommodates the specific voltage thresholds for the 24AA16 series when operating below 2.5V, as clock frequency limitations apply in that range.

Memory IC Selection Notes

Select this component when a 16-Kbit non-volatile memory solution is needed with low power consumption and robust noise immunity. The 24AA16T-E/ST is suitable for applications requiring hardware write protection and operation across a wide voltage range down to 1.7V. Consider the 16-byte page write buffer for efficient data handling compared to byte-write-only devices.

Memory IC Part Context

This part belongs to the 24XX16 family of serial EEPROMs, which also includes the 24LC16B and 24FC16 variants. While sharing the same memory organization and interface, the 24AA16 is distinguished by its 1.7V minimum operating voltage and 400 kHz maximum clock speed. The 'T' in the part number denotes tape-and-reel packaging, while 'ST' specifies the TSSOP package.

Memory IC Replacement Considerations

Direct functional substitutes within the same package include other 24AA16 variants such as 24AA16-I/ST (Industrial temp) or 24AA16-E/MY (MSOP package). Cross-family replacements like 24LC16B require checking voltage compatibility, as it starts at 2.5V. Verify pinout compatibility, noting that A0-A2 pins are not connected on this device.