Winbond Electronics Corporation W25X40CLZPIG

Overview

W25X40CLZPIG from Winbond is a 4 M-bit (512 KB) serial flash memory IC supporting standard SPI, dual-output SPI, and dual I/O SPI interfaces. It features uniform 4 KB sectors, 32 KB and 64 KB blocks, 104 MHz clock operation (208 Mbps equivalent with Fast Read Dual I/O), and operates from 2.3 V to 3.6 V. It is used for code storage, firmware boot, and parameter retention in space-constrained embedded systems.

For engineers reviewing the W25X40CLZPIG datasheet, W25X40CLZPIG pinout, W25X40CLZPIG application, or W25X40CLZPIG equivalent, key selection considerations include its 8-pin WSON 6×5 mm package, hardware /WP and /HOLD control, JEDEC-compliant identification, 4 KB sector granularity, and support for true execute-in-place (XIP) via Continuous Read Mode.

Technical Context

The W25X40CLZPIG implements a SPI-compatible command interface with Mode 0 and Mode 3 support, enabling interoperability with standard microcontroller SPI peripherals. Its dual I/O mode uses bidirectional IO0 and IO1 pins for high-speed data transfer, achieving up to 208 Mbps using the BBh instruction.

Internally, it integrates a 256-byte page buffer, status register with non-volatile BP2–BP0 and TB bits for flexible hardware/software write protection, and high-voltage generators for erase/program operations. The device supports full chip, block, sector, and page-level erases, with guaranteed >100,000 program/erase cycles and >20-year data retention.

Key Specifications

Pinout & Package

W25X40CLZPIG is packaged in an 8-pad WSON 6×5 mm (package code ZP), with exposed pad for thermal dissipation and mechanical stability. Pin 1 is marked by a dot or notch; pin numbering follows standard counter-clockwise orientation from the marking.

Key Features

Applications

Equivalent & Alternatives

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

Compared with W25Q40EWZPIG and AT25DF041A-SSH-T, the W25X40CLZPIG delivers optimal balance of speed (104 MHz Dual I/O), sector flexibility (4 KB), and legacy compatibility in a compact WSON package-making it ideal for established designs requiring proven reliability without architectural changes.

Availability

W25X40CLZPIG is available at Aetrix Electronics and suitable for firmware boot storage, industrial parameter logging, and consumer device configuration requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.

Supply support for W25X40CLZPIG 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 NOR/NAND flash memory solutions.

The W25X series was designed for embedded systems requiring high-speed, low-power, and pin-efficient code and data storage-targeting applications from consumer electronics to industrial controllers where SPI interface simplicity and reliability are critical.

FAQ

What is the operating voltage range of the W25X40CLZPIG?

The W25X40CLZPIG operates from 2.3 V to 3.6 V, making it compatible with both 2.5 V and 3.3 V system rails. This single-supply range eliminates the need for level shifters in mixed-voltage designs and ensures stable performance across industrial temperature extremes (−40°C to +85°C). All timing and electrical specifications in the datasheet are validated within this voltage window, and the W25X40CLZPIG includes built-in power-on reset and write-inhibit threshold logic to prevent corruption during brown-out conditions.

Does the W25X40CLZPIG support Quad SPI (QSPI) mode?

No, the W25X40CLZPIG does not support Quad SPI mode. It supports only standard SPI (single I/O), dual-output SPI (3Bh), and dual I/O SPI (BBh). Quad SPI functionality was introduced in later Winbond families such as the W25Q series. The W25X40CLZPIG's instruction set, pinout, and status register structure are specifically optimized for dual-line operation-not four-line-and attempting QSPI commands will result in unrecognized instruction behavior.

What package type does W25X40CLZPIG use, and is it lead-free?

The W25X40CLZPIG uses an 8-pad WSON 6×5 mm package (package code ZP) with an exposed thermal pad. It is RoHS-compliant and lead-free, meeting JEDEC J-STD-020 moisture sensitivity level 3 (MSL3) requirements. The package supports reflow soldering per IPC/JEDEC J-STD-020D, and the marking "W25X40CLZPIG" appears on the top surface along with date code and Winbond logo.

How many program/erase cycles does the W25X40CLZPIG guarantee?

The W25X40CLZPIG guarantees a minimum of 100,000 program/erase cycles per sector, with data retention exceeding 20 years at +25°C. This endurance rating applies uniformly across all 4 KB sectors and is verified under worst-case voltage and temperature conditions. The device's uniform sector architecture eliminates wear-leveling complexity in firmware, allowing direct mapping of logical data blocks to physical sectors without additional abstraction layers.

Can the W25X40CLZPIG be used for execute-in-place (XIP) operation?

Yes, the W25X40CLZPIG supports true execute-in-place (XIP) operation via its Continuous Read Mode, which requires only 16 clock cycles of instruction overhead to initiate sequential reads after a 24-bit address. This low-overhead access pattern enables microcontrollers to fetch and execute code directly from the flash without copying to RAM-reducing boot latency and eliminating external memory footprint. The mode is activated using the Fast Read Dual I/O (BBh) instruction and is fully supported across all operating voltages and temperatures.