24AA128-I/SN

Memory IC Overview

The Microchip Technology 24AA128-I/SN is a 128 Kbit (16K x 8) serial EEPROM featuring an I2C-compatible two-wire interface. It operates on a single supply voltage ranging from 1.7V to 5.5V and supports clock frequencies up to 400 kHz within the industrial temperature range of -40°C to +85°C. The device utilizes an 8-lead SOIC package and includes hardware write protection, Schmitt trigger inputs for noise suppression, and output slope control to eliminate ground bounce.

Memory IC Feature Summary

• Supports cascading up to eight devices on the same bus using configurable chip select pins.
• Includes a 64-byte page write buffer to optimize data writing efficiency.
• Features hardware write protection via the WP pin to secure memory arrays.

Memory IC Applications

• Personal communications systems
• Data acquisition modules
• Low-power embedded storage

Memory IC Procurement Notes

Verify that the specific ordering suffix matches the required package type and temperature grade. Confirm the voltage range requirements align with the 1.7V minimum specification for the 24AA128 variant. Ensure compatibility with the I2C bus protocol and check for any specific RoHS compliance documentation if required by your manufacturing standards.

Memory IC Selection Notes

Select this component when a 128 Kbit non-volatile memory solution is needed with low power consumption and wide voltage flexibility. The industrial temperature rating makes it suitable for broader environmental conditions compared to commercial grades. Consider the 64-byte page write capability for applications requiring efficient bulk data transfers over the I2C interface.

Memory IC Part Context

This part belongs to the 24XX128 family, which also includes the 24LC128 and 24FC128 variants. While functionally similar in memory organization and interface, the 24AA128 is distinguished by its ability to operate at lower voltages starting from 1.7V, whereas other family members may have different voltage or speed specifications.

Memory IC Replacement Considerations

The 24LC128-I/SN and 24FC128-I/SN are direct pin-compatible alternatives within the same datasheet. Note that the 24LC128 requires a minimum supply voltage of 2.5V, while the 24FC128 supports higher clock speeds depending on the voltage level.

Memory IC FAQ

How does the WP pin affect write operations?

When the WP pin is tied to VCC, write operations are inhibited, protecting the entire array. When tied to VSS, write operations are enabled.

What is the maximum number of devices supported on a single bus?

Up to eight 24AA128 devices can be connected to the same bus by utilizing the A0, A1, and A2 chip select pins for unique addressing.