Winbond Electronics Corporation W25Q16DWBYIG TR

Overview

W25Q16DWBYIG TR from Winbond is a 1.8V, 16M-bit (2MB) serial NOR flash memory IC supporting Standard/Dual/Quad SPI and QPI interfaces, organized into 8,192 × 256-byte pages with uniform 4KB sector erase capability, used for code storage, XIP execution, and firmware parameter retention in space-constrained embedded systems.

For engineers reviewing the W25Q16DWBYIG TR datasheet, W25Q16DWBYIG TR pinout, W25Q16DWBYIG TR application, or W25Q16DWBYIG TR equivalent, this device delivers 104MHz SPI clock support, 50MB/s continuous read throughput, hardware write protection via /WP and /HOLD pins, JEDEC ID and 64-bit unique serial number, and quad-enable configurable I/O mapping for high-speed boot code access.

Technical Context

The W25Q16DWBYIG TR implements a multi-mode SPI controller supporting four distinct protocols: Standard SPI (DI/DO), Dual SPI (IO0/IO1), Quad SPI (IO0–IO3), and QPI (all four IOs for instruction + data). Its command decoder requires QE bit = 1 in Status Register-2 to activate Quad SPI/QPI modes, repurposing /WP and /HOLD as IO2 and IO3 respectively.

Internally, it features a 256-byte page buffer, 512 erasable 4KB sectors, 32 erasable 64KB blocks, and dual status registers with volatile/non-volatile bits for BP, TB, SEC, CMP, SRP, SUS, LB, and QE control - enabling granular hardware/software write protection and suspend/resume during erase/program operations.

Key Specifications

Pinout & Package

W25Q16DWBYIG TR uses an 8-ball WLCSP package (package code BY), measuring 3.2 mm × 2.5 mm × 0.5 mm, with bottom-side solder balls for compact PCB footprint and thermal performance in high-density layouts.

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, the W25Q16DWBYIG TR uniquely combines 1.8V operation, QPI instruction acceleration, 64-bit unique ID, and OTP-secured registers - making it optimal for new designs prioritizing boot speed, security, and industrial temperature resilience.

Availability

W25Q16DWBYIG TR is available at Aetrix Electronics and suitable for industrial automation, automotive ADAS, medical diagnostics, and smart metering applications requiring stable component supply, long-lifecycle support, and guaranteed traceable sourcing.

Supply support for W25Q16DWBYIG 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 manufacturer specializing in specialty memory solutions, including SPI NOR/NAND flash, RAM, and trusted computing components for industrial, automotive, and consumer markets.

The W25Q series was designed specifically for high-reliability embedded systems needing fast, secure, low-voltage serial flash - emphasizing XIP performance, hardware-based protection, and compact packaging for space-constrained PCBs.

FAQ

What is the package type and dimensions of the W25Q16DWBYIG TR?

The W25Q16DWBYIG TR uses an 8-ball WLCSP (Wafer-Level Chip Scale Package) with package code BY, measuring 3.2 mm × 2.5 mm × 0.5 mm. This ultra-compact footprint supports high-density PCB layouts in portable and automotive electronics where board space is constrained. The ball pitch is 0.4 mm, and solder mask defined pads are recommended for reliable assembly. The W25Q16DWBYIG TR's WLCSP construction also provides improved thermal dissipation compared to SOIC variants.

Does the W25Q16DWBYIG TR support execute-in-place (XIP) operation?

Yes, the W25Q16DWBYIG TR supports true execute-in-place operation via its Continuous Read Mode and Quad SPI/QPI interfaces. With as few as 8 clocks of instruction overhead and up to 50MB/s sustained read throughput, it enables microcontrollers to fetch and execute code directly from flash without copying to RAM. The W25Q16DWBYIG TR's 4KB sector architecture and fast read commands like Fast Read Quad I/O (EBh) make it ideal for deterministic boot sequences in real-time systems.

How is hardware write protection implemented on the W25Q16DWBYIG TR?

The W25Q16DWBYIG TR implements hardware write protection using both the /WP pin and non-volatile status register bits (BP2–BP0, TB, SEC, CMP, SRP0/SRP1). When /WP is held low, status register writes are blocked regardless of SRP settings. Combined with BP bits, this allows locking individual 4KB sectors or top/bottom halves of the array. The W25Q16DWBYIG TR's dual-layer protection ensures firmware integrity even if software-level controls are compromised during field updates.

What is required to enable Quad SPI or QPI mode on the W25Q16DWBYIG TR?

To enable Quad SPI or QPI mode on the W25Q16DWBYIG TR, the non-volatile Quad Enable (QE) bit in Status Register-2 must be set to '1' using the Write Status Register (01h) instruction. Once QE=1, the /WP and /HOLD pins become IO2 and IO3, enabling four-line data transfers. For QPI mode specifically, the Enable QPI (38h) command must then be issued. The W25Q16DWBYIG TR remains in QPI mode until Disable QPI (FFh) is sent or a reset occurs.

Does the W25Q16DWBYIG TR include unique identification and security features?

Yes, the W25Q16DWBYIG TR includes a factory-programmed 64-bit unique serial number accessible via Read Unique ID Number (4Bh) and four 256-byte security registers with OTP (One-Time Programmable) lock bits. These registers can store cryptographic keys, calibration data, or device-specific credentials. Once locked, their contents cannot be altered - providing hardware-enforced security for IoT, medical, and automotive applications. The W25Q16DWBYIG TR's security features are fully documented in Sections 7.1.9 and 7.2.35–7.2.37 of its datasheet.