Winbond Electronics Corporation W25Q64JVSSJM

Overview

W25Q64JVSSJM from Winbond is a 64M-bit (8MB) serial NOR flash memory IC designed for code storage and execute-in-place (XIP) applications in space-constrained embedded systems. It supports Standard/Dual/Quad SPI and QPI interfaces with DTR capability, operates from 2.7V to 3.6V, delivers up to 133MHz clock rate (532MHz equivalent Quad I/O), and features 4KB uniform sectors, 100K program-erase cycles, and 20-year data retention.

For engineers reviewing the W25Q64JVSSJM datasheet, W25Q64JVSSJM pinout, W25Q64JVSSJM application, or W25Q64JVSSJM equivalent, key selection considerations include SOIC-208-mil package compatibility, /HOLD and /WP pin availability in standard SPI mode, Quad Enable (QE) bit configuration for IO2/IO3 remapping, and industrial-grade temperature support (–40°C to +85°C).

Technical Context

The W25Q64JVSSJM implements a flexible SPI-compatible memory architecture with three operational modes: Standard SPI (4-wire), Dual SPI (2 I/O lines), and Quad SPI/QPI (4 I/O lines). Its command set includes DTR-capable read instructions (e.g., 0Dh, BDh, EDh) enabling double-data-rate transfers on CLK rising/falling edges, and supports hardware reset only in TFBGA/SOIC-16 variants - not in the 8-pin SOIC-208-mil (SS) package of W25Q64JVSSJM.

Internal organization comprises 32,768 pages of 256 bytes each, grouped into 2,048 erasable 4KB sectors and 64 erasable 64KB blocks. Status Register-2 contains the non-volatile Quad Enable (QE) bit; when QE=1, /WP and /HOLD pins become IO2 and IO3, disabling their hardware protection functions - a critical design constraint for W25Q64JVSSJM's pin mapping and firmware initialization sequence.

Key Specifications

Pinout & Package

W25Q64JVSSJM uses the 8-pin SOIC-208-mil (Package Code SS) with exposed pad not present. Pin functions are fixed per JEDEC-standard SPI interface: /CS, DO (IO1), /WP (IO2), GND, DI (IO0), CLK, /HOLD or /RESET (IO3), VCC. The /RESET function is unavailable in this package - /HOLD is active on Pin 7; /WP remains functional only when QE=0.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MX25L6433FZNI-10G and S25FL164K0XMFI010, W25Q64JVSSJM uniquely delivers DTR-enhanced throughput, QPI mode for reduced instruction latency, and integrated security registers - making it the only option among the three qualified for secure, high-speed boot in modern industrial MCUs.

Availability

W25Q64JVSSJM is available at Aetrix Electronics and suitable for industrial control systems, automotive infotainment modules, and medical diagnostic devices requiring stable component supply across extended product lifecycles.

Supply support for W25Q64JVSSJM 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 since 1987.

The W25Q series targets embedded systems needing high-density, low-power, and interface-flexible NOR flash - specifically engineered for code execution, secure boot, and reliable data logging in industrial and automotive applications.

FAQ

What is the package type and pin count of W25Q64JVSSJM?

W25Q64JVSSJM uses an 8-pin SOIC-208-mil (Package Code SS) with standard SPI pinout: /CS, DO, /WP, GND, DI, CLK, /HOLD, VCC. It does not include a dedicated /RESET pin - that function is only available in TFBGA or 16-pin SOIC packages. The /HOLD pin (Pin 7) remains active in Standard and Dual SPI modes but becomes IO3 in Quad SPI when the Quad Enable bit is set.

Does W25Q64JVSSJM support Quad SPI and QPI modes?

Yes, W25Q64JVSSJM supports both Quad SPI and QPI modes. Quad SPI requires setting the non-volatile Quad Enable (QE) bit in Status Register-2; once enabled, /WP and /HOLD pins become IO2 and IO3. QPI mode is entered via the "Enter QPI (38h)" instruction and provides 4-bit command/address/data transfers, reducing protocol overhead versus standard SPI - a capability confirmed in the official datasheet Revision J.

What is the maximum clock frequency and data throughput of W25Q64JVSSJM?

W25Q64JVSSJM supports up to 133 MHz SPI clock frequency. In Dual SPI mode, this yields up to 266 Mbps effective throughput; in Quad SPI mode, up to 532 Mbps. With DTR (Double Transfer Rate), data is sampled on both clock edges - achieving up to 66 MB/s continuous read performance using instructions like EDh (DTR Fast Read Quad I/O), as specified in the Electrical Characteristics section of the datasheet.

How is hardware write protection implemented on W25Q64JVSSJM?

W25Q64JVSSJM implements hardware write protection via the /WP pin (Pin 3), which is active-low and functional only when the Quad Enable (QE) bit is cleared (QE=0). When asserted, /WP prevents writes to the status register. This works in conjunction with volatile/non-volatile block protect bits (BP2–BP0, TB, SEC) and status register protection bits (SRP, SRL) to safeguard sectors as small as 4KB - a feature validated in the Write Protection section of the datasheet.

Is W25Q64JVSSJM suitable for industrial temperature applications?

Yes, W25Q64JVSSJM is rated for industrial temperature operation from –40°C to +85°C, as explicitly stated in the "Operating Ranges" section (Section 9.2) of the datasheet. It belongs to the Industrial Grade family (not Industrial Plus), and its electrical characteristics - including timing parameters and power consumption - are guaranteed across this full range, making it appropriate for factory automation, outdoor infrastructure, and other demanding environments.