BY25D40ASOIG(R)

Memory IC Overview

The BY25D40ASOIG(R) is a 4M-bit SPI NOR Flash memory by BYTe Semiconductor. It supports Standard and Dual SPI interfaces with clock rates up to 108MHz for Fast Read and Dual Output modes. Operating on a single 2.7V to 3.6V supply, it features 4KB sectors and 32/64KB blocks. Key electrical parameters include 20mA active current and 5uA power-down current. The device offers hardware/software write protection, 100k cycle endurance, and operates from -40°C to +85°C in an 8-pin SOP package.

Memory IC Feature Summary

• Supports Dual SPI operation for high-speed data transfer using bidirectional I/O pins.
• Provides flexible software and hardware write protection via Status Register bits and the /WP pin.
• Includes a factory-set unique 64-bit ID number for system security and anti-cloning.
• Features low power consumption with deep power-down mode for battery-operated applications.

Memory IC Applications

• Consumer electronics firmware storage
• Industrial control system code execution
• Embedded systems requiring secure boot

Memory IC Procurement Notes

Verify the specific suffix 'OIG' against official ordering lists to confirm package type (e.g., TSSOP-8) and tape/reel packaging details. Ensure environmental compliance matches project requirements. Confirm lead times directly with the manufacturer or authorized distributors as standard delivery periods may vary.

Memory IC Selection Notes

Select this component when dual SPI interface speed is required within a 3.3V logic environment. It is suitable for designs needing robust write protection mechanisms and industrial temperature range operation. Verify that the 4Mbit density fits the application's code and data storage needs without exceeding available address space.

Memory IC Part Context

This part belongs to the BY25D40AS family of 4M-bit SPI NOR Flash memories. The series is designed for general-purpose non-volatile storage in embedded applications. Variants within the family typically differ by package style, operating temperature grade, and manufacturing revision, sharing core electrical and functional specifications.

Memory IC Replacement Considerations

Check for direct substitutes like GD25LD40COIGR from GigaDevice. Verify pin compatibility, voltage ranges, and instruction set alignment before substitution. Ensure the replacement supports the required Dual SPI mode if applicable.

Memory IC FAQ

How does the Dual SPI mode improve performance?

Dual SPI uses both SI and SO pins as bidirectional I/O lines, allowing two bits of data to be transferred per clock cycle, effectively doubling the read speed compared to standard SPI.

What is the function of the Unique ID Number?

The Unique ID is a factory-programmed 64-bit number used to identify individual devices, helping prevent system cloning or unauthorized copying of firmware.