Winbond Electronics Corporation W25Q256JWYIM TR

Overview

W25Q256JWYIM TR from Winbond is a 1.8V, 256M-bit (32MB) serial NOR flash memory supporting Dual/Quad SPI, QPI, and DTR read modes. It features uniform 4KB sectors, 133MHz Quad I/O clock capability (532MB/s equivalent throughput), 100K program-erase cycles, and 20-year data retention. Designed for code execution (XIP), firmware storage, and secure parameter logging in space-constrained embedded systems.

For engineers reviewing the W25Q256JWYIM TR datasheet, W25Q256JWYIM TR pinout, W25Q256JWYIM TR application, or W25Q256JWYIM TR equivalent, this page delivers verified package mapping (8-pin WSON 6×5 mm), confirmed pin functions (/CS, CLK, IO0–IO3, /WP, /HOLD), JEDEC ID support, SFDP register compliance, and real-world timing behavior for DTR Fast Read (0Dh/EDh) and Quad I/O operations.

Technical Context

The W25Q256JWYIM TR implements a flexible SPI/QPI command architecture with dual-mode addressing (3-byte/4-byte), configurable Quad Enable (QE) bit in Status Register-2, and hardware-selectable /HOLD or /RESET functionality on Pin 7 (WSON). Its DTR mode doubles data rate per clock edge using double-sampled edges on both rising and falling CLK transitions.

It supports volatile and non-volatile status register bits including Block Protect (BP3–BP0), Top/Bottom protect (TB), Complement protect (CMP), Security Register Lock (LB3–LB1), and Output Driver Strength (DRV1/DRV0). Erase suspend/resume, individual sector lock/unlock, and 64-bit unique ID are implemented in silicon with OTP-backed security registers.

Key Specifications

Pinout & Package

W25Q256JWYIM TR uses the 8-pin WSON 6×5 mm package (Package Code P), with exposed pad for thermal dissipation. Pin 1 is /CS; Pin 2 is DO (IO1); Pin 3 is /WP (IO2); Pin 4 is GND; Pin 5 is DI (IO0); Pin 6 is CLK; Pin 7 is /HOLD or /RESET (IO3); Pin 8 is VCC. /WP and /HOLD revert to IO2/IO3 in Quad mode when QE=1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar serial NOR flash applications.

Compared with MX25L25645GZC-10G and S25FL256SAGMFI000, the W25Q256JWYIM TR uniquely combines 1.8V operation, DTR capability, full SPI/QPI backward compatibility, and WSON 6×5 mm footprint - enabling drop-in upgrade paths in existing 1.8V SPI designs without layout change or controller modification.

Availability

W25Q256JWYIM TR is available at Aetrix Electronics and suitable for industrial PLC firmware storage, automotive ADAS boot image hosting, and medical IoT sensor calibration data retention requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.

Supply support for W25Q256JWYIM TR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Winbond Electronics is a Taiwan-based semiconductor company specializing in specialty memory solutions, including serial NOR/NAND flash, RAM, and mobile DRAM, serving industrial, automotive, and consumer markets since 1987.

The W25Q256JWYIM TR belongs to Winbond's W25Q "JW" family - engineered for high-reliability, low-voltage embedded systems requiring fast XIP performance, robust security, and extended temperature operation without external voltage translation.

FAQ

What is the package type and footprint of W25Q256JWYIM TR?

W25Q256JWYIM TR uses an 8-pin WSON (Wafer-Level Small Outline No-lead) package measuring 6 mm × 5 mm with an exposed thermal pad. It matches Package Code P per Winbond's ordering nomenclature and is compatible with standard reflow profiles for lead-free assembly. The pinout is fixed: Pin 1 = /CS, Pin 2 = DO/IO1, Pin 3 = /WP/IO2, Pin 4 = GND, Pin 5 = DI/IO0, Pin 6 = CLK, Pin 7 = /HOLD/IO3, Pin 8 = VCC.

Does W25Q256JWYIM TR support 4-byte addressing mode?

Yes, W25Q256JWYIM TR fully supports 4-byte addressing via the Enter 4-Byte Address Mode instruction (B7h) and Exit 4-Byte Address Mode (E9h). This is required to access the full 256M-bit address space beyond the 16MB limit of 3-byte mode. All read, program, and erase instructions have 4-byte variants (e.g., 13h, 12h, 21h, DCh), and the ADS bit in Status Register-1 indicates current mode.

How is Quad I/O mode enabled on W25Q256JWYIM TR?

Quad I/O mode on W25Q256JWYIM TR is enabled by setting the Quad Enable (QE) bit (bit 1 of Status Register-2) to '1' using the Write Status Register-2 instruction (31h). Once QE=1, pins /WP (Pin 3) and /HOLD (Pin 7) become IO2 and IO3 respectively, enabling four-bit-wide data transfers. The QE bit can be configured as volatile or non-volatile depending on SRP settings.

What security mechanisms does W25Q256JWYIM TR provide?

W25Q256JWYIM TR provides multiple hardware-enforced security layers: software/hardware write protection via /WP pin and BP/TB/CMP bits; three 256-byte OTP-locked security registers; 64-bit unique serial number; JEDEC-standard manufacturer/device ID; and SFDP register for safe parameter discovery. Power supply lock-down prevents unauthorized writes during brown-out conditions.

Is W25Q256JWYIM TR compatible with standard SPI controllers?

Yes, W25Q256JWYIM TR maintains full backward compatibility with standard SPI controllers through its Standard SPI mode (CLK, /CS, DI, DO, /WP, /HOLD). It executes all legacy SPI instructions (e.g., 03h Read Data, 02h Page Program) at up to 104MHz. No firmware or hardware changes are needed to integrate W25Q256JWYIM TR into existing SPI-based designs - advanced modes like QPI or DTR are optional extensions.