Winbond Electronics Corporation W25Q64CVTBIG

Overview

W25Q64CVTBIG 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, and quad SPI interfaces with up to 80MHz clock frequency, 4KB uniform sector erase granularity, and operates from a single 2.7–3.6V supply with 4mA active and <1µA power-down current.

For engineers reviewing the W25Q64CVTBIG datasheet, W25Q64CVTBIG pinout, W25Q64CVTBIG application, or W25Q64CVTBIG equivalent, key selection criteria include quad I/O support with QE bit configuration, 4KB sector flexibility for firmware partitioning, JEDEC ID and SFDP register compliance, and industrial temperature range (-40°C to +85°C) suitability for automotive and industrial control designs.

Technical Context

The W25Q64CVTBIG implements a SPI-compatible command set with dedicated instructions for fast read (6Bh/EBh), quad I/O page program (32h), and sector/block erase (20h/52h/D8h). Its architecture includes a 256-byte page buffer, dual status registers (SR1/SR2), and non-volatile Quad Enable (QE) bit in SR2 required to activate IO2/IO3 pins for quad mode.

It features hardware write protection via /WP and /HOLD pins (active-low), programmable block protection (BP2–BP0, TB, SEC), and security registers with OTP locks. The device supports continuous read mode with ≤8-clock instruction overhead and delivers up to 40MB/s sustained throughput using Fast Read Quad I/O (EBh) at 80MHz.

Key Specifications

Pinout & Package

W25Q64CVTBIG is packaged in an 8-pin TFBGA 8×6 mm (package code TC, 6×4 ball array), with ball assignments matching the standard W25Q64CV pinout mapping for compact board integration and thermal performance.

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, the W25Q64CVTBIG provides superior system-level integration via SFDP, deterministic XIP latency through continuous read mode, and production-ready security features - making it optimal for certified industrial and automotive firmware storage.

Availability

W25Q64CVTBIG is available at Aetrix Electronics and suitable for industrial PLCs, automotive ADAS ECUs, medical imaging devices, smart energy meters, and IoT edge gateways requiring stable component supply across multi-year production cycles.

Supply support for W25Q64CVTBIG 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, PSRAM, and mobile DRAM for embedded and automotive markets.

The W25Q64CV series belongs to Winbond's SpiFlash family, engineered for high-reliability code storage and XIP execution in resource-constrained microcontroller and SoC platforms.

FAQ

What is the package type and footprint of W25Q64CVTBIG?

W25Q64CVTBIG uses an 8×6 mm TFBGA package with a 6×4 ball array (package code TC). It has 24 balls, with 8 functional signals (CLK, /CS, VCC, GND, DI/IO0, DO/IO1, /WP/IO2, /HOLD/IO3) and 16 no-connect balls. The footprint matches JEDEC MO-249 standards and requires controlled-depth solder paste deposition for reliable assembly.

Does W25Q64CVTBIG support execute-in-place (XIP) operation?

Yes, W25Q64CVTBIG supports true XIP via its Continuous Read Mode, which reduces instruction overhead to as few as 8 clock cycles per 24-bit address. When used with Fast Read Quad I/O (EBh) at 80MHz, it delivers up to 40MB/s sustained throughput - sufficient for direct code execution on ARM Cortex-M7/M33 and RISC-V cores without local RAM buffering.

How is quad SPI mode enabled on W25Q64CVTBIG?

Quad SPI mode on W25Q64CVTBIG is enabled by setting the Quad Enable (QE) bit in Status Register-2 (bit SR2[1]) using the Write Status Register (01h) instruction. Once QE=1, the /WP and /HOLD pins become IO2 and IO3 respectively. This setting is non-volatile and persists across power cycles unless explicitly cleared.

What write protection mechanisms does W25Q64CVTBIG offer?

W25Q64CVTBIG provides layered write protection: hardware-level via active-low /WP pin (when QE=0), software-level via Block Protect (BP2–BP0), Top/Bottom (TB), Sector Protect (SEC), and Complement Protect (CMP) bits, and status register lock via SRP0/SRP1. All protections remain active in power-down mode.

Is W25Q64CVTBIG compatible with JEDEC JESD216 SFDP?

Yes, W25Q64CVTBIG implements JEDEC JESD216-compliant Serial Flash Discoverable Parameters (SFDP) in its dedicated SFDP register (00FF00h–00FFFFh). This allows host processors to auto-detect memory geometry, timing parameters, and supported instructions without hard-coded driver assumptions.