Winbond Electronics Corporation W25Q16JWUXIQ

Overview

W25Q16JWUXIQ from Winbond is a 1.8V, 16M-bit (2MB) serial NOR flash memory with Dual/Quad SPI, QPI and DTR read support, organized as 8,192 × 256-byte pages. It delivers up to 133MHz Quad I/O clocking, 66MB/s continuous read throughput, and supports execute-in-place (XIP) operation for embedded code storage. Its flexible 4KB sector architecture enables precise data/parameter storage in space-constrained IoT and microcontroller boot applications.

For engineers reviewing the W25Q16JWUXIQ datasheet, W25Q16JWUXIQ pinout, W25Q16JWUXIQ application, or W25Q16JWUXIQ equivalent, key selection considerations include its USON 2×3-mm (UX) package, 1.65–1.95V supply range, JEDEC SFDP compliance, 100K program-erase cycles, and hardware write protection via /WP and /HOLD pins - all critical for low-power, high-reliability firmware storage designs.

Technical Context

The W25Q16JWUXIQ implements a quad-peripheral interface (QPI) mode entered via 38h instruction, reducing instruction overhead by transmitting opcodes across all four IO lines in two clocks instead of eight. Its dual transfer rate (DTR) read capability latches address and data on both clock edges, enabling higher effective bandwidth without increasing base clock frequency.

It features three status registers with volatile/non-volatile configuration bits including Quad Enable (QE), Block Protect (BP2–BP0), Top/Bottom protect (TB), Security Register Lock (LB1–LB3), and Output Driver Strength (DRV1/DRV0). The /HOLD and /WP pins serve dual roles: dedicated control inputs in standard/Dual SPI, and reconfigured as IO3/IO2 in Quad SPI/QPI when QE=1.

Key Specifications

Pinout & Package

W25Q16JWUXIQ is supplied in an 8-pad USON 2×3-mm package (JEDEC MO-252, package code UX), optimized for high-density PCB layouts and automated assembly. Pin 1 is marked by a dot; pin numbering follows counter-clockwise orientation from top-left corner.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MX25L1633FZUI-10G and S25FL132K0XMFI010, the W25Q16JWUXIQ provides the highest sustained read bandwidth (66 MB/s) and lowest instruction latency via QPI, making it optimal for XIP-critical applications where firmware size and boot speed are constrained.

Availability

W25Q16JWUXIQ is available at Aetrix Electronics and suitable for industrial HMI, automotive cabin controllers, and IoT edge device designs requiring stable component supply, long-term lifecycle assurance, and USON 2×3-mm footprint compatibility.

Supply support for W25Q16JWUXIQ 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 DRAM, mobile DRAM, and serial flash memory solutions for embedded, communications, and consumer markets.

The W25Q16JWUXIQ belongs to Winbond's W25Q-DTR family - engineered specifically for high-speed, low-voltage firmware and code storage in resource-constrained microcontroller systems with strict PCB area and power budgets.

FAQ

What is the package type and pin count of W25Q16JWUXIQ?

W25Q16JWUXIQ uses an 8-pad USON (Ultra Thin Small Outline No-lead) package measuring 2 mm × 3 mm, with a standardized pinout matching other W25Q-DTR variants in SOIC, WSON, and WLCSP formats. Pin 1 is marked by a dot, and the package complies with JEDEC MO-252 specifications for automated placement and reflow soldering.

Does W25Q16JWUXIQ support execute-in-place (XIP) operation?

Yes, W25Q16JWUXIQ fully supports XIP via Quad SPI and QPI modes, enabling microcontrollers to execute code directly from flash without copying to RAM. Its 133MHz Quad I/O clocking, DTR read capability, and low-latency QPI instruction encoding ensure deterministic timing for real-time interrupt response during XIP execution.

How does the /HOLD pin function differ between standard SPI and Quad SPI modes on W25Q16JWUXIQ?

In standard or Dual SPI mode (QE = 0), the /HOLD pin pauses ongoing operations while /CS is low. In Quad SPI or QPI mode (QE = 1), that same physical pin becomes IO3 - a bidirectional data line - and /HOLD functionality is disabled. This reconfiguration is controlled solely by the non-volatile Quad Enable bit in Status Register-2.

What security mechanisms does W25Q16JWUXIQ provide beyond basic write protection?

W25Q16JWUXIQ includes a 64-bit unique serial number, three 256-byte security registers with OTP lock bits, SFDP v1.6 self-description, and configurable block/sector protection via BP/TB/SEC bits. These features collectively support secure boot verification, device identity binding, and tamper-resistant credential storage - all without external crypto ICs.

Is W25Q16JWUXIQ compatible with legacy SPI controllers that do not support QPI or DTR?

Yes, W25Q16JWUXIQ is backward-compatible with standard SPI controllers operating in Mode 0 or Mode 3. It defaults to standard SPI after power-up or software reset, and supports all legacy instructions (e.g., 03h Read Data, 02h Page Program). QPI and DTR modes must be explicitly enabled via configuration registers - no hardware changes are required for basic SPI use.