BY25D40ASMIG(R)

Memory IC Overview

The BY25D40ASMIG(R) is a 4M-bit SPI NOR Flash memory by BYTe Semiconductor, housed in an 8-USON package. It supports Standard and Dual SPI interfaces with clock rates up to 108 MHz. Operating on a single 2.7V to 3.6V supply, it features 4KB sectors and 32/64KB blocks for flexible erasure. Key electrical parameters include a maximum active current of 20 mA and standby current of 5 µA. The device ensures data integrity through software/hardware write protection and offers 100k program-erase cycles with 20-year retention.

Memory IC Feature Summary

• Supports Dual SPI mode for high-speed data transfer at 108 MHz
• Includes hardware write protection via the /WP pin and software block protection
• Features a Deep Power-Down mode for reduced standby power consumption
• Provides unique 64-bit identification numbers for anti-cloning security

Memory IC Applications

• Battery-powered embedded systems requiring low standby current
• Firmware storage in microcontroller-based devices
• Code execution in XIP (Execute-In-Place) applications
• Data logging and configuration storage in industrial controllers

Memory IC Procurement Notes

Verify the specific suffix 'MIG' against the manufacturer's official ordering guide to confirm the exact package type and tape/reel specifications. Ensure the voltage range and temperature grade match the system requirements. Cross-reference the JEDEC ID codes to validate authenticity and revision level before integration into production designs.

Memory IC Selection Notes

Select this component when dual I/O speed is required within a small footprint. The 8-USON package suits space-constrained designs. Verify that the host controller supports the necessary SPI modes and dummy cycle configurations for Fast Read and Dual Output instructions. Confirm compatibility with the system's voltage levels and write protection strategies.

Memory IC Part Context

This part belongs to the BY25D40AS family of 4M-bit SPI NOR Flash memories. It shares core architecture with other variants differing primarily in package style and packing quantity. The 'R' suffix typically denotes tape and reel packaging, while 'T' indicates tube packaging. All variants maintain identical electrical performance and instruction sets.

Memory IC Replacement Considerations

Direct replacements must match the 4M-bit density, SPI/Dual SPI interface, and 8-USON package. Verify pin compatibility and voltage ranges. Check if alternative manufacturers offer equivalent timing characteristics and write protection features.