24LCS22A-I/SN

Memory IC Overview

The Microchip Technology 24LCS22A-I/SN is a 2Kbit (256 x 8-bit) dual-mode serial EEPROM housed in an 8-pin SOIC package. It operates on a single supply voltage ranging from 2.5V to 5.5V and supports I²C-compatible interfaces with clock frequencies up to 100 kHz at 2.5V and 400 kHz at 5V. The device features industrial temperature ratings from -40°C to +85°C, includes hardware write protection, and provides over 4000V ESD protection.

Memory IC Feature Summary

• Dual-mode operation supporting both Transmit-Only mode for continuous data streaming and Bidirectional mode for full read/write access via the I²C bus.
• Compliant with VESA Enhanced EDID specifications and implements DDC1/DDC2 interface protocols for monitor identification.
• Includes flexible hardware write protection controlled by the WP pin and internal fuse logic.

Memory IC Applications

• Storage of configuration and control information in display systems
• Implementation of Display Data Channel (DDC) standards for monitor identification
• Applications requiring serial transmission of Extended Display Identification Data

Memory IC Procurement Notes

Verify that the component matches the specific Industrial temperature grade (-40°C to +85°C) required for your application environment. Confirm the SOIC package dimensions align with your PCB footprint design. Ensure power supply voltages remain within the specified 2.5V to 5.5V range to maintain proper functionality and data retention characteristics.

Memory IC Selection Notes

Select this component when a dual-mode EEPROM is necessary to support both legacy DDC1 signaling and standard I²C communication. It is suitable for designs requiring hardware-level write protection and compliance with VESA EDID standards. Consider the 8-pin SOIC form factor for surface-mount assembly requirements.

Memory IC Part Context

The 24LCS22A belongs to Microchip's low-power CMOS EEPROM family designed specifically for display applications. It integrates high-voltage generation circuitry and page write buffers to facilitate efficient data management. The device is manufactured using lead-free processes compliant with RoHS directives.

Memory IC Replacement Considerations

Direct replacements include other variants within the 24LCS22 series, such as the 24LCS22A-E/SN for extended temperature ranges or different package options like the PDIP version if through-hole mounting is required.

Memory IC FAQ

How does the device switch between modes?

The device powers up in Transmit-Only mode. A valid high-to-low transition on the SCL pin triggers a transition to Bidirectional mode, where it awaits an I²C control byte.

What happens if no control byte is received in Transition mode?

If the device does not detect a valid control byte after receiving 128 VCLK pulses while SCL is idle, it reverts to the Transmit-Only mode.