W25Q256JWEIM TR

Memory IC Overview

The W25Q256JWEIM TR is a 256M-bit (32M x 8) NOR flash memory from Winbond's SpiFlash series, operating on a single 1.7V to 1.95V supply. It features SPI, Dual/Quad I/O, QPI, and DTR read modes with clock frequencies up to 133MHz. The device offers 4KB uniform sectors, hardware write protection, and security registers. It is housed in an 8-WSON (8x6mm) package and supports -40°C to +85°C operation.

Memory IC Feature Summary

• Supports standard SPI, Dual/Quad I/O, QPI, and Double Transfer Rate (DTR) read instructions for high-speed data access.
• Features flexible architecture with 4KB uniform sectors and programmable page sizes up to 256 bytes.
• Includes advanced security mechanisms such as individual block/sector lock, OTP locks, and power supply lock-down.
• Provides hardware control via dedicated /WP and /HOLD pins for write protection and operational pausing.

Memory IC Applications

• Code shadowing to RAM
• Execute-in-place (XIP) applications
• Storage of voice, text, and data

Memory IC Procurement Notes

Verify the specific ordering suffix against manufacturer documentation to confirm package dimensions and pinout compatibility. Confirm moisture sensitivity level handling requirements during assembly. Ensure voltage supply matches the 1.7V-1.95V range specified for this variant. Check for RoHS compliance status prior to integration.

Memory IC Selection Notes

Select this component when low-voltage operation between 1.7V and 1.95V is required. Choose the 8-WSON package for space-constrained designs. Consider DTR support if maximum throughput is necessary. Verify that the system controller supports the required SPI modes and address lengths.

Memory IC Part Context

This part belongs to the W25Q256JW family of 256M-bit Serial Flash memories. It shares core electrical characteristics with other variants in the series but differs in packaging and specific pin configurations. The 'E' suffix denotes the 8x6mm WSON package, while 'IM' indicates specific pin function assignments.

Memory IC Replacement Considerations

W25Q256JWEIM

Memory IC FAQ

How does the QE bit affect the /WP and /HOLD pins?

When the Quad Enable (QE) bit in Status Register-2 is set for Quad I/O operation, the /WP pin functions as IO2 and the /HOLD pin functions as IO3, disabling their original hardware control capabilities.

What is the difference between /HOLD and /RESET on 8-pin packages?

On 8-pin packages, the IO3 pin can be configured as either /HOLD or /RESET depending on the Status Register setting. When QE=0, it acts as /HOLD; otherwise, it may serve as /RESET based on configuration.