LE25S40AMCTWG

Memory IC Overview

The LE25S40AMCTWG is a 4M-bit (512K x 8) serial flash memory device utilizing an SPI interface. It operates on a single 1.8V power supply within the 1.65V to 1.95V range and supports clock frequencies up to 40MHz. The component features dual output and dual I/O read functions, sector sizes of 4KB and 64KB, and page programming capabilities of 256 bytes. It includes block protection, data retention for 20 years, and endurance ratings of 100,000 rewrite cycles. The device is housed in an 8-pin SOIC-8 or SOP8J package.

Memory IC Feature Summary

• Supports high-performance Dual Output and Dual I/O read modes alongside standard SPI operations.
• Includes hardware write protection via WP pin and software block protect functions controlled by status registers.
• Features small sector erase capability suitable for parameter storage with fewer rewrite cycles.
• Integrates ready/busy status monitoring and self-timed program/erase cycle management.

Memory IC Applications

• Portable information devices requiring compact dimensions
• Storage of parameters or data with limited rewrite requirements
• Embedded systems needing non-volatile code execution

Memory IC Procurement Notes

Verify current availability as the part may be obsolete. Confirm exact ordering suffixes match required package types such as SOP8J or SOIC-8. Check manufacturer documentation for end-of-life notices and recommended replacement components before finalizing procurement plans.

Memory IC Selection Notes

Select this component for applications requiring low voltage operation at 1.8V. Ensure the design supports SPI Mode 0 and Mode 3 interfaces. Verify that the system can accommodate the specific timing requirements for dual I/O reads if high-speed performance is necessary.

Memory IC Part Context

This device belongs to the LE25S40A series of serial flash memories manufactured by onsemi. It is licensed from Silicon Storage Technology, Inc. The series is designed for high-density storage in space-constrained environments, offering reliable non-volatile data retention and fast access speeds.

Memory IC Replacement Considerations

Renesas Electronics Corporation offers compatible alternatives. Verify electrical specifications and pin compatibility when substituting with other manufacturers' parts.

Memory IC FAQ

What are the supported SPI modes?

The LE25S40AMCTWG supports both SPI Mode 0 and SPI Mode 3.

How is the block protection configured?

Block protection is configured via the Status Register bits BP0, BP1, BP2, and TB, allowing selection of protected areas ranging from 1/8 to the entire memory space.