Winbond Electronics Corporation W25X80VSSIG

Overview

W25X80VSSIG from Winbond is an 8M-bit (1MB) serial Flash memory IC designed for embedded code storage and data logging in space-constrained systems. It features uniform 4KB sectors, dual-output SPI interface supporting up to 75MHz clock (150Mbps effective), and operates from a single 2.7–3.6V supply with 5mA active and 1µA power-down current. It is commonly used in firmware boot storage for microcontrollers and parameter retention in industrial controllers.

For engineers reviewing the W25X80VSSIG datasheet, W25X80VSSIG pinout, W25X80VSSIG application, or W25X80VSSIG equivalent, key selection criteria include sector granularity (4KB), dual-output read performance, hardware/software write protection flexibility, JEDEC ID compatibility, and SOIC-208-mil package compatibility with legacy PCB footprints.

Technical Context

The W25X80VSSIG implements a standard SPI bus compliant with Modes 0 and 3, using four dedicated pins: /CS, CLK, DIO (bidirectional), and DO (dedicated output). Its dual-output mode activates only during Fast Read Dual Output (3Bh) instruction, repurposing DIO as a second data output line to double throughput without requiring additional I/O resources.

Internal architecture includes a 4096-page (256-byte/page) array organized into 256 erasable 4KB sectors and 16 erasable 64KB blocks. Write protection is enforced via both hardware (/WP pin) and software (Status Register BP2–BP0, TB, SRP bits), enabling selective top/bottom array locking with non-volatile configuration.

Key Specifications

Pinout & Package

W25X80VSSIG is packaged in an 8-pin SOIC 208-mil (package code SS), with gull-wing leads, 1.27 mm pitch, and body dimensions of 5.33 mm × 5.33 mm. This package is pin-compatible with other W25X-series devices in the same footprint and supports reflow soldering per J-STD-020.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar serial Flash memory applications.

Compared with AT25DF081-SSHN-B and SST25VF080B-80-4I-SAE, W25X80VSSIG provides superior read throughput via dual-output mode, integrated /HOLD for robust bus sharing, and JEDEC-compliant identification - making it optimal for boot-critical and resource-constrained embedded systems.

Availability

W25X80VSSIG is available at Aetrix Electronics and suitable for industrial control systems, medical diagnostics equipment, and automotive infotainment modules requiring stable component supply across extended product lifecycles.

Supply support for W25X80VSSIG 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, Flash memory, and mobile DRAM solutions for industrial, communications, and consumer markets.

The W25X series was designed specifically for embedded systems needing compact, low-power, high-reliability serial Flash with flexible protection and fast read performance - targeting MCU boot, firmware storage, and parameter logging applications.

FAQ

What is the maximum SPI clock frequency supported by the W25X80VSSIG?

The W25X80VSSIG supports SPI clock frequencies up to 75 MHz under standard operating conditions. When using the Fast Read Dual Output (3Bh) instruction, this enables an effective data transfer rate of 150 Mbps. The device meets AC timing specifications at this speed, including setup/hold margins for DIO and DO relative to CLK, as verified in Section 11.7 of the official datasheet.

Does the W25X80VSSIG support Quad SPI mode?

No, the W25X80VSSIG does not support Quad SPI mode. It supports standard SPI (single I/O) and dual-output SPI (DIO + DO simultaneously during Fast Read Dual Output instruction only). Quad SPI functionality - requiring four bidirectional I/O lines - is absent; the pinout and instruction set confirm only two data lines (DIO and DO) are implemented.

How many 4KB sectors does the W25X80VSSIG contain?

The W25X80VSSIG contains exactly 256 uniform 4KB sectors, totaling 1,048,576 bytes (8 M-bit) of addressable memory. Each sector can be erased independently using the Sector Erase (20h) instruction. This sector count is explicitly stated in the General Description section and confirmed in the Status Register Memory Protection table for the W25X80 variant.

What is the function of the /HOLD pin on the W25X80VSSIG?

The /HOLD pin on the W25X80VSSIG pauses ongoing SPI transactions while /CS remains low, placing DO in high-impedance state and ignoring DIO and CLK inputs. This enables safe bus sharing among multiple SPI peripherals. The hold condition activates on the falling edge of /HOLD (or next CLK falling edge if CLK is high), and terminates on the rising edge (or next CLK falling edge), as detailed in Section 9.1.3.

Is the W25X80VSSIG pin-compatible with other W25X-series devices in SOIC-208-mil packages?

Yes, the W25X80VSSIG uses the SOIC-208-mil package (code SS), which is shared with the W25X40 in the same footprint. Pin assignment (1–8: /CS, DO, /WP, GND, DIO, CLK, /HOLD, VCC) is identical across all W25X-series variants in this package type, enabling direct substitution where density and timing requirements align.