Winbond Electronics Corporation W25Q16CLSVIG

Overview

W25Q16CLSVIG from Winbond is a 16M-bit (2MB) serial NOR flash memory IC supporting Standard, Dual, and Quad SPI interfaces with 50MHz clock rate, 4KB uniform sector architecture, and 2.3–3.6V single supply - used for code storage, XIP execution, and firmware parameter retention in space-constrained embedded systems.

For engineers reviewing the W25Q16CLSVIG datasheet, W25Q16CLSVIG pinout, W25Q16CLSVIG application, or W25Q16CLSVIG equivalent, key selection considerations include Quad Enable (QE) bit configuration, /WP and /HOLD pin reassignment in Quad mode, 4KB sector erase granularity, JEDEC ID (EF4015), and SFDP register support for auto-configuration.

Technical Context

The W25Q16CLSVIG implements a SPI command-set compatible with Mode 0 and Mode 3 clock polarity, supports hardware write protection via active-low /WP and /HOLD pins (disabled in Quad I/O mode), and uses non-volatile Status Register-2 bit QE to enable IO2/IO3 functionality. It features an 8,192-page (256-byte/page) array organized into 512 × 4KB sectors and 32 × 64KB blocks.

Its functional architecture includes Erase/Program Suspend & Resume (75h/7Ah), Continuous Read Mode with 8-clock address overhead, and 64-bit unique serial number. Security features comprise three 256-byte OTP-lockable security registers, SFDP register (5Ah), and volatile/non-volatile status bits for flexible memory protection.

Key Specifications

Pinout & Package

W25Q16CLSVIG is supplied in an 8-pad WSON 6×5 mm package (package code ZP), with exposed pad for thermal dissipation and no internal heatsink requirement. Pin assignments are identical across SOIC, VSOP, and WSON variants.

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 S25FL132K0XMFI010, W25Q16CLSVIG delivers optimal balance of Quad I/O performance, industrial temperature support, SFDP configurability, and cost - making it ideal for consumer and industrial embedded designs needing XIP, OTA, and secure parameter storage without ECC overhead.

Availability

W25Q16CLSVIG is available at Aetrix Electronics and suitable for boot code storage, firmware OTA updates, and industrial parameter retention requiring stable component supply, long-term lifecycle assurance, and consistent WSON-8 packaging.

Supply support for W25Q16CLSVIG 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 SPI NOR/NAND flash, RAM, and TrustME secure memory products.

The W25Q series was designed specifically for embedded systems requiring high-speed, low-power, and secure serial flash - targeting code execution, firmware storage, and trusted data retention in resource-constrained environments.

FAQ

What is the pin configuration and package type of W25Q16CLSVIG?

W25Q16CLSVIG uses an 8-pad WSON 6×5 mm package (ZP code) with standard SOIC-compatible pinout: /CS, DO(IO1), /WP(IO2), GND, VCC, /HOLD(IO3), CLK, DI(IO0). All pins are surface-mount; the exposed thermal pad is electrically isolated and recommended for grounding to improve thermal performance. This exact pin mapping applies to W25Q16CLSVIG and is documented in Figure 1b of the Winbond datasheet.

Does W25Q16CLSVIG support Quad SPI mode, and how is it enabled?

Yes, W25Q16CLSVIG supports Quad SPI mode using instructions such as EBh (Fast Read Quad I/O) and E7h (Word Read Quad I/O). Quad mode is enabled by setting the non-volatile Quad Enable (QE) bit in Status Register-2 via the Write Status Register (01h) instruction. Once QE=1, /WP and /HOLD become IO2 and IO3 respectively. This configuration is persistent across power cycles and is required for W25Q16CLSVIG to operate in full Quad I/O mode.

What is the erase granularity and endurance specification for W25Q16CLSVIG?

W25Q16CLSVIG offers uniform 4KB sector erase (512 sectors), 32KB block erase (128 blocks), and 64KB block erase (32 blocks), plus full-chip erase. It guarantees ≥100,000 program/erase cycles per sector and 20-year data retention at +85°C. These values are measured and specified in the Winbond W25Q16CL datasheet Section 7.6 and apply directly to W25Q16CLSVIG under industrial temperature conditions.

How does hardware write protection work on W25Q16CLSVIG?

W25Q16CLSVIG implements hardware write protection via the active-low /WP pin, which locks the Status Register when asserted. When combined with Block Protect (BP2–BP0), Top/Bottom (TB), and Status Register Protect (SRP0/SRP1) bits, it enables selective locking of 4KB sectors up to the full array. Note that /WP functionality is disabled in Quad SPI mode (QE=1), as the pin becomes IO2. This behavior is inherent to W25Q16CLSVIG's pin multiplexing architecture.

Is W25Q16CLSVIG compatible with SFDP and does it provide a unique device ID?

Yes, W25Q16CLSVIG supports the JEDEC JESD216 Standard Flash Discovery Parameter (SFDP) register, accessible via instruction 5Ah, providing programmable timing and feature descriptors. It also includes a factory-programmed 64-bit unique serial number readable with instruction 4Bh. Both SFDP and Unique ID are verified features of W25Q16CLSVIG and are used in bootloader initialization and secure provisioning workflows.