Winbond Electronics Corporation W25Q16JWBYIM TR

Overview

W25Q16JWBYIM TR from Winbond is a 1.8V, 16M-bit (2MB) serial NOR flash memory supporting Standard, Dual, and Quad SPI interfaces with up to 133MHz clock rate, 4KB uniform sector architecture, and industrial temperature range (–40°C to +85°C). It delivers 66MB/s continuous read throughput in Quad I/O mode and supports XIP (execute-in-place), code shadowing, and secure data storage in space-constrained embedded systems.

For engineers reviewing the W25Q16JWBYIM TR datasheet, W25Q16JWBYIM TR pinout, W25Q16JWBYIM TR application, or W25Q16JWBYIM TR equivalent, key selection criteria include Quad SPI enable (QE bit), hardware write-protect (/WP), /HOLD functionality, 1.65–1.95V supply compatibility, and WLCSP-8 (BY) package footprint for high-density PCB layouts.

Technical Context

The W25Q16JWBYIM TR 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 (Status Register-2) configuration. Its memory array comprises 8192 × 256-byte pages, organized into 512 erasable 4KB sectors and 32 erasable 64KB blocks.

It integrates volatile/non-volatile status register bits for fine-grained protection (BP2–BP0, TB, SEC, CMP, SRP/SRL), individual block/sector lock (36h/39h), 64-bit unique ID, SFDP register, and three 256-byte security registers. The /HOLD pin functions as IO3 in Quad mode and is inactive when QE=1.

Key Specifications

Pinout & Package

W25Q16JWBYIM TR uses an 8-ball WLCSP (Wafer-Level Chip Scale Package) with 0.4 mm pitch, marked "BY" per Winbond ordering information. This ultra-compact 2.0 × 2.5 × 0.5 mm package targets high-density portable and wearable designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MX25L1633FZUI-10G and S25FL116K0XMFI011, the W25Q16JWBYIM TR uniquely combines WLCSP-8 size, 133 MHz Quad I/O, 64-bit UID, and three OTP security registers - making it optimal for miniaturized, secure, high-throughput embedded systems where board area and firmware integrity are critical.

Availability

W25Q16JWBYIM TR is available at Aetrix Electronics and suitable for IoT edge node firmware storage, automotive body control modules, and industrial HMI display boot memory requiring stable component supply across extended product lifecycles.

Supply support for W25Q16JWBYIM 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 DRAM, serial flash, and mobile DRAM solutions since 1987.

The W25Q series targets high-performance, low-voltage embedded systems requiring robust code storage, secure firmware updates, and compact packaging - especially where Quad SPI bandwidth and industrial reliability are mandatory.

FAQ

What is the package type and dimensions of the W25Q16JWBYIM TR?

The W25Q16JWBYIM TR uses an 8-ball WLCSP (Wafer-Level Chip Scale Package) with 0.4 mm pitch and physical dimensions of 2.0 mm × 2.5 mm × 0.5 mm. This package is designated "BY" in Winbond's ordering nomenclature and is optimized for ultra-high-density PCB layouts in portable and wearable electronics. The W25Q16JWBYIM TR does not include a hardware /RESET pin, as that feature is reserved for SOIC-16 and TFBGA packages.

Does the W25Q16JWBYIM TR support Quad SPI operation, and how is it enabled?

Yes, the W25Q16JWBYIM TR supports Quad SPI operation using IO0–IO3 pins, achieving up to 133 MHz clock rates and 66 MB/s continuous read throughput. Quad mode is enabled by setting the non-volatile Quad Enable (QE) bit in Status Register-2 via the Write Status Register-2 (31h) instruction. Once QE=1, the /WP and /HOLD pins become IO2 and IO3 respectively - the W25Q16JWBYIM TR must be reconfigured in software before switching modes.

What write protection mechanisms does the W25Q16JWBYIM TR provide?

The W25Q16JWBYIM TR provides layered write protection: hardware-level via the active-low /WP pin, software-level via Status Register bits (BP2–BP0, TB, SEC, CMP, SRP/SRL), and granular sector/block locking via 36h/39h instructions. The WPS bit in Status Register-3 selects between register-based or individual lock schemes. All protections remain active during power-down, and the W25Q16JWBYIM TR enforces tPUW delay after power-up to prevent spurious writes.

Can the W25Q16JWBYIM TR be used for execute-in-place (XIP) applications?

Yes, the W25Q16JWBYIM TR supports execute-in-place (XIP) directly from Dual or Quad SPI buses, eliminating the need to copy firmware to RAM before execution. Its 133 MHz Quad I/O clock and Fast Read Quad I/O (EBh) instruction deliver sufficient bandwidth for real-time code fetch in Cortex-M and RISC-V microcontrollers. The W25Q16JWBYIM TR's uniform 4KB sector architecture also simplifies memory mapping and update partitioning for XIP-based bootloaders.

What unique identification and security features are integrated into the W25Q16JWBYIM TR?

The W25Q16JWBYIM TR includes a factory-programmed 64-bit unique serial number accessible via instruction 4Bh, three 256-byte security registers with OTP lock capability (42h/44h/48h), and SFDP (Serial Flash Discoverable Parameters) register support. These features enable secure device authentication, cryptographic key storage, and standardized parameter discovery - critical for regulated medical, industrial, and IoT applications requiring traceability and tamper resistance. The W25Q16JWBYIM TR's security registers are protected by dedicated lock bits (LB3–LB1) in Status Register-3.