24AA128-I/SM

Memory IC Overview

The Microchip Technology 24AA128-I/SM is a 16K x 8 (128 Kbit) Serial Electrically Erasable PROM (EEPROM). It operates with a single supply voltage ranging from 1.7V to 5.5V and supports I2C compatible two-wire serial interface communication at clock frequencies up to 400 kHz. The device features a 64-byte page write buffer, hardware write-protect capability, and Schmitt trigger inputs for noise suppression. It is housed in an 8-Lead SOIJ package and is rated for industrial temperature ranges from -40°C to +85°C.

Memory IC Feature Summary

• Supports cascading up to eight devices on the same bus using configurable chip address inputs.
• Includes hardware write-protect functionality via the WP pin to inhibit array writes.
• Features output slope control designed to eliminate ground bounce during operation.

Memory IC Applications

• Personal communications systems
• Data acquisition applications
• Advanced low-power electronic designs

Memory IC Procurement Notes

Verify that the specific ordering suffix corresponds to the required package type and temperature grade. Confirm that the voltage range requirements align with the 1.7V to 5.5V specification for the 24AA128 series. Ensure compatibility with the I2C bus protocol and check for any specific environmental compliance documentation if required for the target market.

Memory IC Selection Notes

Select this component when a 128 Kbit non-volatile memory solution is needed with low power consumption and broad voltage flexibility. The industrial temperature rating makes it suitable for environments outside standard commercial limits. Consider the SOIJ package dimensions for board layout constraints and verify that the 400 kHz maximum clock frequency meets system timing requirements.

Memory IC Part Context

This part belongs to the 24XX128 family of serial EEPROMs manufactured by Microchip Technology. The family includes variants like the 24LC128 and 24FC128, which share similar architectures but differ in minimum operating voltage and maximum clock speed specifications. The 24AA128 specifically targets applications requiring operation down to 1.7V.

Memory IC Replacement Considerations

The 24LC128 and 24FC128 are functionally related parts within the same datasheet. However, the 24LC128 requires a minimum voltage of 2.5V, while the 24FC128 supports higher clock speeds. Verify voltage and speed requirements before substituting.

Memory IC FAQ

How many devices can be connected to the same I2C bus?

Up to eight 24AA128 devices can be connected to the same bus by utilizing different combinations of the A0, A1, and A2 chip select pins.

What is the purpose of the WP pin?

The Write-Protect (WP) pin allows the user to inhibit write operations to the entire memory array when tied to VCC, while read operations remain unaffected.