Winbond Electronics Corporation W25Q16BVSSIG

Overview

W25Q16BVSSIG from Winbond is a 16 M-bit (2 MB) serial NOR flash memory IC supporting Standard, Dual, and Quad SPI interfaces with 4 KB uniform sectors, 104 MHz max clock frequency, and single 2.7–3.6 V supply - used for code storage, XIP execution, and firmware parameter retention in microcontroller-based embedded systems.

For engineers reviewing the W25Q16BVSSIG datasheet, W25Q16BVSSIG pinout, W25Q16BVSSIG application, or W25Q16BVSSIG equivalent, key selection considerations include Quad SPI enable (QE bit), /WP and /HOLD dual-role behavior in Quad mode, 4 KB sector granularity for fine-grained updates, and SOIC-8 208-mil package compatibility with legacy PCB footprints.

Technical Context

The W25Q16BVSSIG implements a SPI command-set architecture with three operational modes: Standard SPI (DI/DO unidirectional), Dual SPI (IO0/IO1 bidirectional), and Quad SPI (IO0–IO3 bidirectional requiring QE=1). Its internal block diagram includes a 256-byte page buffer, status register control logic, high-voltage generators for erase/program, and flexible write protection via SRP/BP bits and hardware /WP pin.

Quad SPI operation reassigns /WP and /HOLD to IO2 and IO3 respectively, disabling their hardware protection functions during active Quad mode; the device supports JEDEC-standard manufacturer/device ID (9Fh), 64-bit unique serial number (4Bh), and continuous read mode with ≤8-clock instruction overhead for true execute-in-place (XIP) capability.

Key Specifications

Pinout & Package

W25Q16BVSSIG is packaged in an 8-pin SOIC 208-mil (package code SS), with gull-wing leads, 1.27 mm pitch, and standard JEDEC MS-012AC footprint. Pin 1 is marked with a beveled corner or dot.

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, the W25Q16BVSSIG delivers higher Quad SPI bandwidth (416 MHz equivalent vs. 80 MHz max for MX25L1606E), native JEDEC ID compliance without vendor-specific initialization, and direct pin-to-pin compatibility with existing Winbond W25Q family layouts - making it optimal for cost-sensitive, performance-driven embedded designs requiring proven XIP stability.

Availability

W25Q16BVSSIG is available at Aetrix Electronics and suitable for industrial PLC firmware storage, IoT edge device OTA updates, and medical diagnostic instrument boot code requiring stable component supply across long-lifecycle programs.

Supply support for W25Q16BVSSIG 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 for embedded, communications, and consumer markets.

The W25Q series was designed specifically for high-reliability code storage and execute-in-place (XIP) applications in resource-constrained microcontroller systems, emphasizing sector-level flexibility, low-power operation, and multi-SPI protocol compatibility.

FAQ

What is the package type and lead count of the W25Q16BVSSIG?

The W25Q16BVSSIG uses an 8-pin SOIC package with 208-mil body width (package code SS), featuring gull-wing leads and JEDEC MS-012AC footprint compatibility. This package is distinct from the 150-mil (SN), PDIP (DA), WSON (ZP), and 16-pin SOIC (SF) variants offered for the same W25Q16BV die. The 'SS' suffix in W25Q16BVSSIG explicitly denotes the 208-mil SOIC variant.

Does the W25Q16BVSSIG support Quad SPI operation, and what is required to enable it?

Yes, the W25Q16BVSSIG supports Quad SPI operation using instructions such as Fast Read Quad Output (6Bh) and Fast Read Quad I/O (EBh), but requires the non-volatile Quad Enable (QE) bit in Status Register-2 to be set to '1'. Once enabled, pins /WP and /HOLD become IO2 and IO3 respectively, disabling their hardware write-protect and hold functions during active Quad mode.

How many program/erase cycles and data retention years does the W25Q16BVSSIG guarantee?

The W25Q16BVSSIG guarantees ≥100,000 program/erase cycles per 4 KB sector and ≥20 years of data retention at +25°C ambient temperature. These values are specified under standard operating conditions (2.7–3.6 V, –40°C to +85°C) and apply uniformly across all sectors of the W25Q16BVSSIG array.

Can the W25Q16BVSSIG be used for execute-in-place (XIP) applications, and what feature enables this?

Yes, the W25Q16BVSSIG supports true execute-in-place (XIP) operation via its Continuous Read Mode, which reduces instruction overhead to as few as 8 clock cycles for addressing - enabling deterministic fetch latency. Combined with Quad SPI's 416 MHz equivalent bandwidth, this allows microcontrollers to run code directly from flash without copying to RAM, reducing BOM cost and boot time.

What is the function of the /WP and /HOLD pins on the W25Q16BVSSIG in Standard versus Quad SPI modes?

In Standard and Dual SPI modes, /WP provides hardware write protection for the status register, and /HOLD pauses ongoing transactions. In Quad SPI mode (QE=1), both pins are reassigned as IO2 and IO3 for data I/O, disabling their dedicated protection and hold functions. This functional shift is documented in the W25Q16BVSSIG datasheet Section 8.3 and Figure 1a.