24AA044-I/SN

Memory IC Overview

The Microchip Technology 24AA044-I/SN is a 4-Kbit (512 x 8) serial electrically erasable programmable read-only memory (EEPROM). It operates on a single supply voltage ranging from 1.7V to 5.5V and features an I2C-compatible two-wire serial interface. The device supports clock frequencies up to 1 MHz, with specific limits based on supply voltage: 100 kHz for VCC below 1.8V, 400 kHz for 1.8V ≤ VCC < 2.2V, and 1 MHz for VCC ≥ 2.2V. It is housed in an 8-lead SOIC package and functions within an industrial temperature range of -40°C to +85°C.

Memory IC Feature Summary

• Supports cascading up to four devices on the same bus using hardware address inputs A1 and A2.
• Includes Schmitt trigger inputs and noise suppression filters to ensure stable operation on noisy buses.
• Features output slope control designed to eliminate ground bounce during switching.
• Provides hardware write protection via the WP pin to secure data integrity.

Memory IC Applications

• Data logging applications requiring non-volatile storage
• Configuration parameter storage in embedded systems
• Device identification and calibration data retention

Memory IC Procurement Notes

Verify that the ordering suffix corresponds to the Industrial temperature grade (-40°C to +85°C) and the SOIC-8 package type. Confirm that the required clock frequency aligns with the operating voltage constraints specified in the datasheet. Ensure compatibility with the host controller's I2C pull-up resistor requirements.

Memory IC Selection Notes

Select this component when a 4-Kbit EEPROM capacity is required with I2C connectivity. The Industrial temperature grade suits general-purpose electronics. Consider the page write buffer size if high-throughput writing is needed. Verify that the system voltage remains within the 1.7V to 5.5V range to maintain specified performance levels.

Memory IC Part Context

This part belongs to the 24AA044 family of serial EEPROMs manufactured by Microchip Technology. The 'I' suffix denotes the Industrial temperature rating, while 'SN' indicates the 8-lead Small Outline Integrated Circuit package. It shares functional similarities with other members of the 24-series but differs in capacity and package options.

Memory IC Replacement Considerations

Direct substitutes include other 24AA044 variants with different packages or temperature grades, such as 24AA044-E/SN or 24AA044-I/ST. Cross-brand replacements require verification of I2C protocol compatibility and voltage thresholds.

Memory IC FAQ

How does the maximum clock frequency vary with supply voltage?

The maximum clock frequency is 100 kHz for VCC below 1.8V, 400 kHz for VCC between 1.8V and 2.2V, and 1 MHz for VCC at or above 2.2V.

What is the function of the WP pin?

The WP pin enables hardware write protection. When tied to VCC, the entire array is protected from writes. When tied to VSS, write operations are allowed.

Can multiple 24AA044 devices be used on a single bus?

Yes, up to four devices can be connected to the same bus by configuring the chip select bits A1 and A2 to unique logic levels.