Winbond Electronics Corporation W25Q16JWSSIM

Overview

W25Q16JWSSIM from Winbond is a 1.8V, 16M-bit (2MB) serial NOR flash memory IC supporting Standard, Dual, and Quad SPI interfaces with up to 133MHz Quad I/O clock rate, 4KB uniform sector architecture, and hardware/software write protection - used for code execution (XIP), firmware storage, and parameter retention in space-constrained industrial embedded systems.

For engineers reviewing the W25Q16JWSSIM datasheet, W25Q16JWSSIM pinout, W25Q16JWSSIM application, or W25Q16JWSSIM equivalent, key selection criteria include 1.65–1.95V supply compatibility, -40°C to +85°C industrial temperature grade, SOIC-8 208-mil package (SS), Quad Enable (QE) bit configuration, and JEDEC SFDP register support for auto-configurable boot.

Technical Context

The W25Q16JWSSIM implements a flexible SPI interface with three operational modes: Standard (DI/DO), Dual (IO0/IO1), and Quad (IO0–IO3), where Quad mode requires non-volatile QE bit = 1 in Status Register-2. Its memory array comprises 8192 × 256-byte pages organized into 512 erasable 4KB sectors and 32 erasable 64KB blocks.

It supports erase/program suspend/resume, 64-bit unique ID, three 256-byte security registers, and dual write-protection schemes: status-register-based (BP/TB/SEC/CMP) and individual block lock (39h/36h instructions), with WPS bit selecting between them. The /HOLD pin functions as IO3 only in Quad mode; otherwise it enables hold operation during active selection.

Key Specifications

Pinout & Package

W25Q16JWSSIM uses the 8-pin SOIC-208-mil package (Package Code SS), with pin 1 marked by notch or dot. All pins are electrically identical across SOIC variants (SN/SS), WSON (ZP), XSON (XH), and WLCSP (BY); this variant maps directly to the SS footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MX25L1606EM2I-12G and S25FL116K0XMFI041, W25Q16JWSSIM uniquely combines industrial temperature grade, JEDEC SFDP, 64-bit UID, and individual block locking in a single 1.8V SOIC-208 package - enabling secure, auto-configurable, and field-upgradable firmware storage without voltage translation or driver rework.

Availability

W25Q16JWSSIM is available at Aetrix Electronics and suitable for industrial PLCs, medical diagnostic equipment, smart energy meters, and automotive camera modules requiring stable component supply across extended product lifecycles.

Supply support for W25Q16JWSSIM 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 SPI NOR/NAND flash and RAM products for industrial, automotive, and consumer applications.

The W25Q series targets high-reliability embedded systems needing fast, secure, and flexible code and data storage - designed specifically for XIP-capable microcontrollers, boot loaders, and firmware-over-the-air (FOTA) update architectures.

FAQ

What is the package type and pin count of W25Q16JWSSIM?

W25Q16JWSSIM uses an 8-pin SOIC-208-mil package (Package Code SS), with standard pinout matching other W25Q16JW variants. Pin 1 is marked by a notch or dot; all signal names (/CS, DO, /WP, GND, DI, CLK, /HOLD, VCC) and electrical behavior are identical across SOIC, WSON, XSON, and WLCSP packages.

Does W25Q16JWSSIM support Quad SPI mode out of the box?

No - W25Q16JWSSIM requires the Quad Enable (QE) bit in Status Register-2 to be set (non-volatile write) before Quad SPI instructions (e.g., EBh) become functional. By default, QE = 0; users must issue Write Status Register-2 (31h) with QE = 1 to activate IO2 (/WP) and IO3 (/HOLD) as bidirectional data lines.

What is the maximum clock frequency supported by W25Q16JWSSIM in Quad I/O mode?

W25Q16JWSSIM supports up to 133 MHz in Quad I/O mode, enabling a theoretical peak throughput of 532 Mbps (133 MHz × 4 bits). This is achieved using Fast Read Quad I/O (EBh) with appropriate AC timing compliance; actual sustained read rates reach 66 MB/s under continuous burst conditions.

How does hardware write protection work on W25Q16JWSSIM?

Hardware write protection on W25Q16JWSSIM is implemented via the active-low /WP pin, which - when held low - prevents writes to the status register regardless of software commands. It works in conjunction with status register bits (SRP, BP2–BP0, TB, SEC) to lock specific memory regions. /WP must be pulled high (via external resistor) to allow status register modification.

Is W25Q16JWSSIM compatible with standard SPI controllers that do not support Dual or Quad modes?

Yes - W25Q16JWSSIM is fully backward-compatible with standard SPI controllers using only /CS, CLK, DI, and DO pins. It supports SPI Mode 0 and Mode 3, and all Standard SPI instructions (e.g., 03h Read Data, 02h Page Program) function without enabling Dual or Quad modes or modifying any status bits.