Winbond Electronics Corporation W25Q16FWUUIG TR

Overview

W25Q16FWUUIG TR from Winbond is a 1.8V, 16M-bit serial flash memory IC supporting Standard/Dual/Quad SPI and QPI interfaces, organized into 8192 × 256-byte pages with 4KB uniform sector erase, 50 MB/s continuous read throughput, and 104 MHz max clock frequency - deployed for XIP code execution and firmware storage in space-constrained embedded controllers.

For engineers reviewing the W25Q16FWUUIG TR datasheet, W25Q16FWUUIG TR pinout, W25Q16FWUUIG TR application, or W25Q16FWUUIG TR equivalent, key selection criteria include Quad Enable (QE) bit configuration for IO2/IO3 remapping, /HOLD vs /RESET functional mode dependency on QE state, JEDEC ID (EF4015) verification, and USON4x3-mm (UU) package thermal and layout compatibility.

Technical Context

The W25Q16FWUUIG TR implements a multi-mode serial interface architecture: Standard SPI uses DI/DO unidirectionally with /CS, CLK, /WP, /HOLD; Dual/Quad SPI repurposes /WP and /HOLD as IO2/IO3 when QE=1 in Status Register-2. QPI mode requires explicit 38h entry and reduces instruction overhead to 2 clocks via 4-line parallel instruction fetch.

Its memory array supports concurrent erase/program suspend-resume, 100K program-erase cycles per sector, and 20-year data retention. Security features include three 256-byte OTP-lockable security registers, 64-bit unique ID, SFDP register, and configurable top/bottom/complement block protection via BP2–BP0, TB, SEC, and CMP bits.

Key Specifications

Pinout & Package

W25Q16FWUUIG TR is supplied in an 8-pad USON 4×3-mm package (package code UU), with exposed pad for thermal dissipation and footprint optimized for high-density PCB layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar serial flash memory applications.

Compared with MX25L1606EM1I-12G and S25FL116K0XMFI041, the W25Q16FWUUIG TR uniquely combines 1.8V operation, QPI mode, /HOLD–/RESET pin flexibility, and integrated security registers - making it optimal for new 1.8V embedded designs prioritizing XIP performance and firmware integrity.

Availability

W25Q16FWUUIG TR is available at Aetrix Electronics and suitable for industrial PLCs, medical diagnostics, automotive infotainment, and IoT edge gateways requiring stable component supply, long-term lifecycle assurance, and qualified USON packaging.

Supply support for W25Q16FWUUIG 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 DRAM, mobile DRAM, and serial flash memory solutions since 1987.

The W25Q series targets embedded systems requiring high-speed, low-voltage, secure serial flash - designed specifically for XIP-capable microcontrollers and resource-constrained IoT endpoints.

FAQ

What is the JEDEC manufacturer and device ID for W25Q16FWUUIG TR?

The W25Q16FWUUIG TR returns JEDEC ID EF4015 (0xEF 0x40 0x15) via the 9Fh instruction, confirming Winbond as the manufacturer and identifying it as a 16M-bit Serial Flash device. This ID is used by bootloaders for automatic device detection and initialization sequence selection. The W25Q16FWUUIG TR also supports dual/quad I/O ID reads (92h/94h) for validation in high-speed interface configurations.

How does the /HOLD pin behavior change when the Quad Enable (QE) bit is set in W25Q16FWUUIG TR?

When QE=0 (default), pin 7 functions as /HOLD to pause ongoing SPI transfers. When QE=1, pin 7 becomes IO3 for Quad SPI and QPI operations, disabling the /HOLD function entirely. The W25Q16FWUUIG TR datasheet explicitly states that /HOLD is unavailable during Quad SPI or QPI modes. To retain hold functionality, QE must remain unset, or alternative bus arbitration must be implemented in the host controller.

Does W25Q16FWUUIG TR support true execute-in-place (XIP) operation, and what conditions are required?

Yes, the W25Q16FWUUIG TR supports true XIP via Fast Read Quad I/O (EBh) and QPI modes, achieving up to 50 MB/s continuous throughput. Required conditions include enabling the QE bit, configuring the host controller for Quad I/O or QPI timing, using Continuous Read Mode (77h), and ensuring stable 104 MHz CLK with proper signal integrity. The W25Q16FWUUIG TR's 8-clock address overhead and wrap modes minimize latency for sequential instruction fetches.

What package type and dimensions does W25Q16FWUUIG TR use, and is thermal pad exposed?

The W25Q16FWUUIG TR uses an 8-pad USON 4×3-mm package (code UU) with a fully exposed thermal pad on the bottom surface. This pad must be soldered to a PCB copper pour for thermal dissipation and mechanical stability. The package complies with JEDEC MO-255 and has a maximum height of 0.55 mm - suitable for ultra-thin portable and wearable electronics where Z-height is constrained.

Can W25Q16FWUUIG TR's security registers be locked permanently, and how is this enforced?

Yes, the W25Q16FWUUIG TR includes three 256-byte security registers with one-time-programmable (OTP) lock bits (LB[3:1]). Once LB bits are set via 42h program command, the corresponding register becomes read-only and immune to further writes or erases. This hardware-enforced lock prevents tampering with stored cryptographic keys or calibration data, and the W25Q16FWUUIG TR's datasheet confirms OTP status persists across power cycles and full chip erases.