Winbond Electronics Corporation W25Q16JWZPSQ

Overview

W25Q16JWZPSQ 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 frequency, 4KB uniform sector architecture, and hardware/software write protection - deployed in embedded boot code storage, firmware update partitions, and configuration data retention for industrial controllers.

For engineers reviewing the W25Q16JWZPSQ datasheet, W25Q16JWZPSQ pinout, W25Q16JWZPSQ application, or W25Q16JWZPSQ equivalent, this page delivers verified pin functions, JEDEC-compliant ID support, SFDP register access, 64-bit unique serial number, and real-world erase/program cycle endurance (100K cycles) - all confirmed for the ZPSQ package variant.

Technical Context

The W25Q16JWZPSQ implements a quad I/O SPI interface requiring non-volatile Quad Enable (QE) bit setting in Status Register-2 to activate IO2 (/WP) and IO3 (/HOLD) pins; it supports SPI modes 0 and 3, with CLK idle low (Mode 0) or high (Mode 3), and maintains full instruction compatibility across Standard/Dual/Quad protocols including Fast Read Quad I/O (EBh) at 133MHz.

Its memory array comprises 8192 × 256-byte pages organized into 512 erasable 4KB sectors and 32 erasable 64KB blocks; erase suspend/resume functionality enables concurrent background operations, while volatile/non-volatile status register bits (BP2–BP0, TB, SEC, CMP, SRP, WPS) enable hierarchical, field-configurable memory protection without external logic.

Key Specifications

Pinout & Package

W25Q16JWZPSQ uses an 8-pad XSON 2×3×0.4 mm package (JEDEC MO-263AA, Winbond code XH), optimized for space-constrained PCB layouts and reflow-compatible assembly. Pin 1 is /CS; pin 2 is DO (IO1); pin 3 is /WP (IO2); pin 4 is GND; pin 5 is DI (IO0); pin 6 is CLK; pin 7 is /HOLD (IO3); pin 8 is VCC.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MX25L1633FZUI-10G and S25FL132K0XMFI010, the W25Q16JWZPSQ uniquely balances 1.8V operation, Quad I/O performance, JEDEC-standard SFDP, and industrial-plus temperature range in a compact XSON package - making it optimal for new 1.8V embedded designs requiring field-upgradable firmware with minimal footprint.

Availability

W25Q16JWZPSQ is available at Aetrix Electronics and suitable for industrial automation, medical diagnostics, and smart energy metering requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for W25Q16JWZPSQ 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 serial NOR/NAND flash, RAM, and mobile DRAM - serving industrial, communications, and consumer markets since 1987.

The W25Q16JWZPSQ belongs to Winbond's W25Q "SpiFlash" family, engineered for high-speed, low-voltage embedded systems requiring reliable code storage, secure configuration, and seamless integration with ARM Cortex-M and RISC-V bootloaders.

FAQ

What is the package type and dimensions of W25Q16JWZPSQ?

W25Q16JWZPSQ uses an 8-pad XSON package measuring 2.0 mm × 3.0 mm × 0.4 mm (JEDEC MO-263AA), with pin 1 marked by a dot or beveled corner. This compact footprint supports high-density PCB layouts and is compatible with standard reflow soldering profiles. The XH package code confirms this configuration, and mechanical drawings are available in Winbond's Package Specification document #DS-W25Q16JW-03.

Does W25Q16JWZPSQ support Quad SPI mode out of the box?

No - W25Q16JWZPSQ requires explicit configuration to enable Quad SPI. The non-volatile Quad Enable (QE) bit in Status Register-2 must be set to '1' using the Write Status Register-2 (31h) instruction. Until then, /WP and /HOLD pins function as hardware write protect and hold inputs, not as IO2/IO3. This prevents accidental misconfiguration and ensures backward compatibility with Standard SPI designs.

How does the W25Q16JWZPSQ handle power-up write protection?

W25Q16JWZPSQ enforces robust power-up protection: it remains in reset while VCC is below VWI (~1.45V), then disables all program/erase instructions for tPUW (100 µs min) after VCC exceeds VWI. Additionally, the Write Enable Latch (WEL) defaults to '0', requiring a Write Enable (06h) instruction before any modify operation. This dual-layer safeguard prevents spurious writes during voltage ramp-up or brown-out conditions.

Can W25Q16JWZPSQ be used for Execute-in-Place (XIP) applications?

Yes - W25Q16JWZPSQ supports true XIP via Fast Read Quad I/O (EBh) at up to 133MHz, delivering sustained 532MB/s throughput. Its uniform 4KB sector architecture allows precise mapping of executable code segments, and the erase/program suspend feature lets the host interrupt long operations to service XIP fetches - making it suitable for Cortex-M7/M33 microcontrollers running firmware directly from flash.

What security mechanisms does W25Q16JWZPSQ provide beyond basic write protection?

W25Q16JWZPSQ provides layered security: (1) 64-bit factory-unique serial number for device identity; (2) three 256-byte security registers with OTP lock bits (LB1–LB3); (3) individual 64KB block and 4KB sector lock/unlock commands (36h/39h); (4) top/bottom/complement array protection via status register bits; and (5) JEDEC-standard SFDP register for authenticated parameter discovery - all accessible via documented SPI instructions without external crypto ICs.