Winbond Electronics Corporation W25Q64CVZESG

Overview

W25Q64CVZESG from Winbond is a 64M-bit (8MB) serial NOR flash memory IC supporting Standard, Dual, and Quad SPI interfaces with up to 80MHz clock frequency, 4KB uniform sector erase granularity, and 1µA power-down current. It serves as non-volatile code/data storage in microcontroller-based embedded systems requiring XIP execution or fast boot code shadowing.

For engineers reviewing the W25Q64CVZESG datasheet, W25Q64CVZESG pinout, W25Q64CVZESG application, or W25Q64CVZESG equivalent, key selection criteria include Quad SPI enable (QE bit), 4KB sector architecture for firmware partitioning, hardware write protection via /WP and /HOLD pins, and JEDEC-compliant SFDP register for auto-configuration.

Technical Context

The W25Q64CVZESG implements a SPI command-set compatible with Mode 0 and Mode 3 clock polarity, supports instruction-level suspend/resume for erase/program operations, and uses a 256-byte page buffer for programming. Its status register includes volatile and non-volatile bits for block protection (BP2–BP0), top/bottom lock (TB), security register locks (LB3–LB1), and Quad Enable (QE).

Quad SPI operation requires QE=1 in Status Register-2, repurposing /WP and /HOLD as IO2 and IO3; standard and dual SPI retain dedicated /WP and /HOLD functionality. The device integrates a 64-bit unique ID, SFDP register, and three 256-byte OTP-locked security registers for secure firmware storage.

Key Specifications

Pinout & Package

W25Q64CVZESG is packaged in an 8-pad WSON 8x6-mm (package code ZE), with exposed pad for thermal dissipation and footprint compatibility with space-constrained PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MX25L6433FZNI-10G and S25FL164K0XMFI011, the W25Q64CVZESG provides JEDEC SFDP compliance for plug-and-play driver integration, smaller WSON-8 packaging, and factory-programmed 64-bit UID-making it optimal for compact, software-defined embedded designs requiring rapid bring-up and secure identity.

Availability

W25Q64CVZESG is available at Aetrix Electronics and suitable for industrial automation, automotive infotainment, and medical diagnostics requiring stable component supply, long-lifecycle support, and traceable sourcing.

Supply support for W25Q64CVZESG 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 memory solutions including NOR/NAND flash, SRAM, and mobile DRAM.

The W25Q series targets embedded systems needing high-speed, low-power serial flash with advanced features like Quad SPI, SFDP, and security registers-designed specifically for code execution and secure firmware storage in resource-constrained devices.

FAQ

What is the package type and footprint of W25Q64CVZESG?

W25Q64CVZESG uses an 8-pad WSON 8x6-mm package (ZE code) with exposed thermal pad. It has identical pinout to the 6x5-mm ZP variant but larger body dimensions for improved thermal performance and mechanical stability on dense PCBs. The footprint matches standard WSON-8 land patterns with 0.5mm pitch.

Does W25Q64CVZESG support execute-in-place (XIP) operation?

Yes, W25Q64CVZESG supports true XIP via Continuous Read Mode with as few as 8 clock cycles overhead per address. When configured for Quad SPI (QE=1), it achieves up to 320MB/s effective bandwidth-enabling direct code execution from flash without copying to RAM, reducing system memory requirements and boot latency.

How is hardware write protection implemented on W25Q64CVZESG?

W25Q64CVZESG implements hardware write protection through the /WP pin (active-low), which locks the status register when asserted. Combined with non-volatile BP2–BP0 and TB bits, it enables selective 4KB sector or full-array protection. The /WP pin is disabled during Quad SPI operation (reassigned as IO2), so status register protection must be managed via software when QE=1.

What is the role of the Quad Enable (QE) bit in W25Q64CVZESG?

The QE bit (bit 1 of Status Register-2) is a non-volatile flag that enables Quad SPI mode. When QE=1, the /WP and /HOLD pins become IO2 and IO3, allowing four-line data transfer. This bit must be set via Write Status Register (01h) instruction before issuing Quad SPI commands like EBh (Fast Read Quad I/O); it persists across power cycles.

Is W25Q64CVZESG compliant with JEDEC standards for serial flash interoperability?

Yes, W25Q64CVZESG complies with JEDEC JESD216 for Serial Flash Discoverable Parameters (SFDP), accessible via instruction 5Ah. It also supports JEDEC JESD22-A117 for data retention and JESD47 for reliability testing. Manufacturer and device ID (9Fh) and 64-bit unique ID (4Bh) follow JEDEC-standard formats.