X1227S8Z-2.7A

Overview

The X1227S8Z-2.7A is a serial EEPROM integrated circuit manufactured by Intersil, now part of Renesas Electronics. It features a 2-kbit (256 x 8) memory array organized in a single block. The device communicates via an I2C-compatible two-wire serial interface, supporting standard and fast modes. It operates within a supply voltage range of 2.7 V to 5.5 V and is housed in an 8-pin SOIC package. Key functional attributes include hardware write protection, byte-write capability, and self-timed write cycles, ensuring data integrity during power fluctuations.

Feature Summary

• 256-byte serial EEPROM memory with I2C interface
• Hardware write protect pin for data security
• Self-timed write cycle (max 5 ms)
• High endurance: 1 million write cycles

Applications

• Configuration storage for embedded systems
• Calibration data retention in industrial controllers
• User setting memory in consumer electronics

Procurement Notes

Verify the manufacturer status as Intersil has been acquired by Renesas Electronics. Confirm that the specific suffix '2.7A' denotes the 2.7V minimum operating voltage variant. Check current availability as legacy components may be subject to end-of-life notices or obsolescence warnings from the distributor.

Selection Notes

Select this component when a small, non-volatile storage solution is required for system parameters. Ensure the design supports I2C bus timing requirements. Verify that the 2.7V lower voltage limit aligns with the system's power rail stability. Consider the SOIC-8 package dimensions for PCB layout constraints.

Part Context

This part belongs to the X1227 series of serial EEPROMs. It is functionally similar to other I2C EEPROMs but distinguished by its specific voltage threshold and Intersil/Renesas manufacturing lineage. It serves as a compact alternative to parallel EEPROMs where board space and pin count are limited.

Replacement Considerations

Direct replacements must match the 256-bit capacity, I2C interface, and 2.7V-5.5V voltage range. Verify pin compatibility for SOIC-8 packages. Cross-reference with Renesas' current portfolio for equivalent parts if Intersil-branded units are unavailable.