Winbond Electronics Corporation W25Q64CVSSJG TR

Overview

W25Q64CVSSJG TR from Winbond is a 64M-bit (8MB) serial NOR flash memory IC supporting Standard, Dual, and Quad SPI interfaces with up to 80 MHz clock frequency, 4 KB uniform sector erase granularity, and 1 µA typical power-down current. It delivers 40 MB/s continuous read throughput in Quad I/O mode and enables execute-in-place (XIP) operation for embedded code storage in microcontroller-based systems.

For engineers reviewing the W25Q64CVSSJG TR datasheet, W25Q64CVSSJG TR pinout, W25Q64CVSSJG TR application, or W25Q64CVSSJG TR equivalent, this page provides verified package mapping (SOIC-8 208-mil), confirmed pin functions including /CS, CLK, DI/IO0, DO/IO1, /WP/IO2, /HOLD/IO3, GND, VCC, and real-world design implications of Quad Enable (QE) bit dependency, sector protection architecture, and SFDP register support.

Technical Context

The W25Q64CVSSJG TR implements a SPI command-set architecture with three operational modes: Standard SPI (4-wire, unidirectional DI/DO), Dual SPI (4-wire, bidirectional IO0/IO1), and Quad SPI (6-wire, bidirectional IO0–IO3). Its internal block diagram includes a 256-byte page buffer, 2,048 × 4 KB sectors, 128 × 64 KB blocks, and dedicated logic for erase/program suspend/resume.

Quad SPI mode requires non-volatile QE bit (Status Register-2, bit 1) to be set; when enabled, /WP and /HOLD pins repurpose as IO2 and IO3. The device supports JEDEC-standard manufacturer/device ID (90h/9Fh), 64-bit unique serial number (4Bh), and SFDP register (5Ah) for discoverable parameter configuration - all accessible via defined instruction opcodes.

Key Specifications

Pinout & Package

W25Q64CVSSJG TR uses an 8-pin SOIC-208-mil package (package code SS), with lead-free, RoHS-compliant finish and standard JEDEC MS-012AC footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with W25Q64CVSSJG TR, MX25L6433FZNI-10G offers lower-voltage operation but sacrifices Quad I/O bandwidth and security features, while S25FL164K0XMFI010 matches clock and voltage specs but requires register-level firmware changes and omits OTP-protected key storage - making W25Q64CVSSJG TR optimal for XIP-critical, security-sensitive industrial designs.

Availability

W25Q64CVSSJG TR is available at Aetrix Electronics and suitable for industrial HMI, automotive ADAS, IoT secure boot, medical device configuration, and embedded code shadowing applications requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.

Supply support for W25Q64CVSSJG TR 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 flash, RAM, and mobile DRAM, with ISO 9001 and IATF 16949 certification.

The W25Q series targets high-performance embedded systems requiring fast, reliable, and secure non-volatile storage - optimized for code execution, firmware updates, and parameter retention in resource-constrained environments.

FAQ

What is the package type and footprint compatibility of W25Q64CVSSJG TR?

W25Q64CVSSJG TR uses an 8-pin SOIC-208-mil package (JEDEC MS-012AC) with 1.27 mm pitch and 5.33 mm × 5.33 mm body size. It shares footprint compatibility with industry-standard SOIC-8 devices including W25Q64DVSSIG and AT25DF641-AU, enabling drop-in replacement in existing layouts where voltage and timing margins permit.

Does W25Q64CVSSJG TR support execute-in-place (XIP) operation, and what conditions are required?

Yes, W25Q64CVSSJG TR supports true XIP via Continuous Read Mode with ≤8-clock instruction overhead per 24-bit address. To enable XIP, the device must be configured for Quad SPI mode (QE bit = 1 in Status Register-2), use Fast Read Quad I/O (EBh) or Word Read Quad I/O (E7h) instructions, and operate within its 80 MHz clock limit - delivering up to 320 MHz effective throughput.

How is hardware write protection implemented on W25Q64CVSSJG TR, and does it conflict with Quad SPI mode?

Hardware write protection on W25Q64CVSSJG TR uses the /WP pin to lock the status register when low, preventing modification of BP, TB, SEC, and SRP bits. This function is only active when the Quad Enable (QE) bit is cleared (QE = 0); when QE = 1 for Quad SPI operation, /WP becomes IO2 and hardware write protection is disabled - requiring software-based protection instead.

What is the role of the SFDP register in W25Q64CVSSJG TR, and how is it accessed?

The SFDP (Serial Flash Discoverable Parameters) register in W25Q64CVSSJG TR (addressed via instruction 5Ah) provides standardized, vendor-agnostic timing and feature parameters - including erase times, write enable latency, and Quad SPI configuration - allowing host drivers to auto-configure without hardcoded values. It is read-only and accessible only in Standard SPI mode.

Can W25Q64CVSSJG TR perform simultaneous read and write operations, and what mechanisms support real-time responsiveness?

No, W25Q64CVSSJG TR does not support true simultaneous read/write. However, it implements Erase/Program Suspend (75h) and Resume (7Ah) commands that pause active erase or program cycles to service urgent read requests or interrupts - preserving internal state and resuming from exact point of interruption, which maintains deterministic response in RTOS environments.