BY25Q256FSSIG(R)

Memory IC Overview

The BY25Q256FSSIG(R) is a 256M-bit Serial Peripheral Interface (SPI) NOR Flash memory manufactured by BYTe Semiconductor. It supports Standard, Dual, Quad SPI, and QPI modes with Double Transfer Rate (DTR) read capabilities. The device operates on a single supply voltage ranging from 2.7V to 3.6V. Key performance metrics include a Normal Read clock rate of 55MHz, Fast Read up to 100MHz, and data transfer speeds reaching 432Mbits/s in Quad I/O and DTR modes. It features flexible architecture with 4KB sectors and 32/64KB blocks, offering typical endurance of 100k program-erase cycles and 20-year data retention.

Memory IC Feature Summary

• Supports multiple interface modes including Standard SPI, Dual SPI, Quad SPI, and QPI with Double Transfer Rate (DTR) for high-speed data access.
• Enables Execute In Place (XIP) operation allowing continuous code execution directly from the flash memory.
• Includes comprehensive hardware and software write protection mechanisms with discoverable parameters and security registers.
• Features flexible memory architecture with uniform 4KB sectors and 32/64KB blocks for efficient erase operations.

Memory IC Applications

• Embedded systems requiring direct code execution from non-volatile memory
• Industrial control devices needing robust data retention and wide temperature operation
• Consumer electronics utilizing high-speed firmware storage
• Communication equipment requiring reliable serial flash memory solutions

Memory IC Procurement Notes

Verify the specific package variant against the datasheet, as BYTe offers 8-pin SOP, 16-pin SOP, and WSON options. Confirm the ordering suffix matches the required pin configuration and environmental rating. Ensure compatibility with host controller SPI/QPI settings before integration. Check for RoHS compliance status if required by regional regulations.

Memory IC Selection Notes

Select this component when 256M-bit capacity and high-speed Quad/DTR SPI interfaces are required. It is suitable for applications needing XIP capability and extensive write protection features. Consider the operating voltage range of 2.7V to 3.6V for power supply design. Evaluate the need for 4-byte addressing mode support for future scalability.

Memory IC Part Context

This part belongs to the BY25Q256FS family of 256M-bit SPI NOR Flash memories. It is designed to compete with industry-standard devices offering similar density and interface speeds. The family supports various packaging options to accommodate different board space constraints. It integrates advanced protection features common in modern industrial-grade flash memory products.

Memory IC Replacement Considerations

Check for compatible 256M-bit SPI NOR Flash devices from other manufacturers that support Quad SPI and QPI modes. Verify pinout compatibility if replacing in existing designs. Ensure equivalent voltage ranges and temperature specifications are met. Confirm that substitute parts support the required DTR read speeds and XIP functionality.

Memory IC FAQ

Does the BY25Q256FSSIG(R) support Execute In Place (XIP)?

Yes, the device allows XIP operation through continuous read commands with wrap modes.

What is the maximum data transfer speed in Quad I/O mode?

The Quad I/O and QPI data transfer speed can reach up to 432Mbits/s.

How many address bytes does the device support?

It supports both 3-byte and 4-byte addressing modes via dedicated instructions.