BY25Q20BLRIG(R)

Memory IC Overview

The BY25Q20BLRIG(R) is a 2M-bit (256K x 8) SPI NOR Flash memory manufactured by BYTe Semiconductor. It supports Standard, Dual, and Quad SPI interfaces with clock rates up to 33MHz for normal read and 85MHz for other modes. The device operates on a single low voltage supply ranging from 1.65V to 2.0V. It features flexible erase architecture including page, sector, block, and chip erase options. The component includes software and hardware write protection mechanisms, three 512-byte security registers with OTP lock, and a 128-bit unique serial number. It is available in USON packages.

Memory IC Feature Summary

• Supports Standard, Dual, and Quad SPI communication protocols with software reset capabilities.
• Features flexible erase architecture optimized for code shadowing and data storage applications.
• Includes comprehensive write protection via status register bits, hardware /WP pin, and power supply lock-down.
• Integrates three 512-byte security registers with one-time programmable lock functionality.

Memory IC Applications

• Code shadowing from flash memory into embedded or external RAM for execution
• High-volume consumer-based applications requiring program code storage
• Data storage segments utilizing flexible erase granularity

Memory IC Procurement Notes

Verify the specific package variant required, as the datasheet lists multiple USON configurations (USON8 1.5x1.5mm, USON6 1.2x1.2mm, etc.). Confirm that the selected package supports the necessary interface modes, noting that 6-pin packages lack Hold, Write Protect, and Quad SPI functions. Ensure the system design accommodates the 1.65V to 2.0V operating voltage range rather than standard 3.3V logic levels.

Memory IC Selection Notes

Select this component when a low-voltage (1.65V-2.0V) operation is required, distinguishing it from standard 3.3V parts like the BY25Q40GWUIG. Consider the package constraints carefully; if Quad SPI or Hardware Reset/Hold functions are essential, avoid the 6-pin package variants. Verify that the 10k cycle endurance meets the application's write frequency requirements, as it is lower than some industrial-grade alternatives.

Memory IC Part Context

The BY25Q20BL belongs to the BY25Qxx series of SPI NOR Flash memories from BYTe Semiconductor. This series is designed for high-volume consumer electronics where efficient memory usage and low power consumption are critical. The 'BL' suffix typically denotes the specific voltage range and feature set within the product line, differentiating it from higher voltage or higher density counterparts.

Memory IC Replacement Considerations

BY25Q20BLRIG(T)

Memory IC FAQ

Does the BY25Q20BL support Quad SPI mode?

Yes, the device supports Quad SPI mode using instructions such as Fast Read Quad Output (6Bh) and Fast Read Quad I/O (EBh). However, this function requires the Quad Enable (QE) bit to be set and is not available in 6-pin package variants.

What is the difference between the /HOLD and /RESET functions?

The /HOLD function pauses serial communications without resetting the clock sequence, while the /RESET function resets the device to its initial power-on state. The function of the pin is configured via the HOLD/RST bit in Status Register-3.

How is the Security Registers protected?

The Security Registers are protected by LB (Lock Bit) bits in Status Register-2. These are One-Time Programmable (OTP) bits; once set to 1, the corresponding Security Registers become permanently read-only.