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Winbond Electronics Corporation W25Q32FWSSIG
- Part No.:
- W25Q32FWSSIG
- Manufacturer:
- Winbond Electronics Corporation
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
W25Q32FWSSIG.pdf
- Description:
- IC FLASH 32MBIT SPI/QUAD 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,764
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Product details
Overview
W25Q32FWSSIG from Winbond is a 1.8V, 32M-bit (4MB) serial NOR flash memory IC supporting Standard/Dual/Quad SPI and QPI interfaces. It features 104MHz max clock frequency, 4KB uniform sector erase, 256-byte page programming, and integrated hardware write protection via /WP and /HOLD pins. It is used in embedded boot code storage, firmware update storage, and XIP-capable microcontroller systems.
For engineers reviewing the W25Q32FWSSIG datasheet, W25Q32FWSSIG pinout, W25Q32FWSSIG application, or W25Q32FWSSIG equivalent, key selection criteria include 1.65–1.95V supply compatibility, Quad Enable (QE) bit configuration for IO2/IO3 remapping, /RESET pin availability in SOIC-16/TFBGA packages, and JEDEC ID (EF4016) verification for firmware loader compatibility.
Technical Context
The W25Q32FWSSIG implements a flexible SPI command set with dual/quad I/O modes enabled by setting the non-volatile Quad Enable (QE) bit in Status Register-2. In Quad SPI mode, /WP and /HOLD become IO2 and IO3, disabling their hardware protection functions unless QE=0.
It supports true execute-in-place (XIP) operation via Continuous Read Mode with ≤8-clock instruction overhead and wrap lengths of 8/16/32/64 bytes. Erase granularity includes 4KB sectors (1,024 total), 32KB blocks (128), and 64KB blocks (64), enabling fine-grained firmware partitioning and parameter storage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 32 M-bit (4 MB) organized as 32,768 × 256-byte pages |
| Supply Voltage | 1.65 V to 1.95 V - enables low-power operation in battery-backed or energy-constrained systems |
| Max Clock Frequency | 104 MHz (SPI), 208 MHz equiv. (Dual I/O), 416 MHz equiv. (Quad I/O) - supports high-throughput firmware loading |
| Page Program Time | Typ. 0.6 ms per 256-byte page - determines minimum firmware patch latency |
| Sector Erase Time | Typ. 300 ms per 4KB sector - impacts field-upgrade responsiveness |
| Data Retention | >20 years at 25°C - ensures long-term reliability in industrial deployments |
| Endurance | 100,000 program/erase cycles per sector - supports frequent OTA updates |
Pinout & Package
W25Q32FWSSIG uses an 8-pin SOIC 208-mil package (Package Code SS), with exposed pad not present. Pin functions are standardized across SOIC/VSOP variants and validated per datasheet Figures 1a and 3.3.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 /CS | Chip Select Input | Active-low enable; must transition high→low after power-up before accepting commands |
| 2 DO (IO1) | Data Output / Bidirectional I/O | Unidirectional output in Standard SPI; bidirectional in Dual/Quad SPI; requires pull-up for tri-state control |
| 3 /WP (IO2) | Write Protect Input / Bidirectional I/O | Hardware lock for status register when QE=0; becomes IO2 in Quad mode (QE=1) |
| 4 GND | Ground Reference | Primary return path for VCC and I/O signals; must be low-impedance for timing stability |
| 5 DI (IO0) | Data Input / Bidirectional I/O | Unidirectional input in Standard SPI; bidirectional in Dual/Quad SPI; rising-edge sampled |
| 6 CLK | Serial Clock Input | Master-generated timing signal; supports SPI Modes 0 and 3; max 104 MHz |
| 7 /HOLD (IO3) | Hold Input / Bidirectional I/O | Pauses ongoing read/write when active low; becomes IO3 in Quad mode (QE=1) |
| 8 VCC | Power Supply | 1.65–1.95 V only; out-of-range voltage disables operation and may cause latch-up |
Key Features
| Feature | Design Value |
|---|---|
| Quad Peripheral Interface (QPI) | Reduces instruction overhead to 2 clocks per command, enabling deterministic XIP execution without software polling |
| Continuous Read Mode | Supports 8/16/32/64-byte wrap bursts with ≤8-clock address setup - eliminates per-byte command overhead in streaming reads |
| Individual Block/Sector Lock | Allows per-sector OTP or volatile locking via 32h/39h/3Dh instructions - isolates critical bootloader regions from accidental overwrite |
| 64-bit Unique ID | Factory-programmed, read-only serial number (4Bh instruction) - enables device-level traceability and secure provisioning |
| Security Registers | Three 256-byte OTP-lockable registers (42h/44h/48h) - store cryptographic keys or calibration data with hardware-enforced write protection |
Applications
| Boot Code Storage | Firmware Update Storage |
|---|---|
Use Scenario: Storing primary bootloader and initial firmware image for ARM Cortex-M or RISC-V microcontrollers. IC Role / Device Role / Timing Role: Non-volatile code storage with XIP support; accessed during cold start and reset recovery sequences. Use Value: Enables zero-latency instruction fetch directly from flash via Quad SPI, eliminating RAM copy overhead and reducing BOM cost. |
Use Scenario: Holding signed firmware delta patches and version-managed application binaries in IoT edge gateways. IC Role / Device Role / Timing Role: Field-upgradable persistent storage with atomic sector erase and page program; accessed during OTA agent runtime. Use Value: Supports safe rollback via dual-bank sector layout and 100K-cycle endurance - critical for unattended remote devices. |
| Parameter & Configuration Storage | Audio/Log Data Buffering |
Use Scenario: Retaining factory-calibrated sensor offsets, user preferences, and network credentials in medical diagnostic equipment. IC Role / Device Role / Timing Role: Small-data, high-reliability NV storage; updated infrequently but requiring >20-year retention. Use Value: 4KB uniform sectors allow isolated write/erase of config blocks without disturbing adjacent firmware or logs. |
Use Scenario: Cyclic buffering of audio samples or system event logs in voice-controlled home appliances. IC Role / Device Role / Timing Role: High-write-count circular buffer using wear-leveling firmware; accessed via burst reads/writes. Use Value: 50 MB/s continuous read throughput and 256-byte page granularity optimize streaming bandwidth and minimize erase fragmentation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial NOR flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MX25L3233FZUI-10G | 32Mb, 1.65–2.0V, 133MHz max clock, no /RESET pin in 8-pin SOIC, JEDEC ID EF4016 identical | Lacks dedicated /RESET in 8-pin package; no WLCSP option; same sector/block architecture | Select when higher clock margin (133MHz vs. 104MHz) is required and /RESET is managed externally or via software reset. |
| S25FL132K0XMFI011 | 32Mb, 2.7–3.6V only, 85MHz max clock, 4KB sectors, no QPI mode, different SFDP layout | Not voltage-compatible with 1.8V systems; lacks Quad I/O and QPI; uses legacy SPI-only command set | Select only for legacy 3.3V designs where QPI/XIP is unnecessary and existing Cypress driver stack is reused. |
Compared with W25Q32FWSSIG, MX25L3233FZUI-10G offers higher clock tolerance but no integrated /RESET in SOIC-8, while S25FL132K0XMFI011 requires 3.3V operation and sacrifices QPI performance - making W25Q32FWSSIG optimal for new 1.8V XIP-enabled designs demanding flexibility and longevity.
Availability
W25Q32FWSSIG is available at Aetrix Electronics and suitable for boot code storage, firmware update storage, and parameter/configuration storage requiring stable component supply, long-term lifecycle assurance, and full pinout compatibility with Winbond's W25Q32FW family.
Supply support for W25Q32FWSSIG 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, mobile DRAM, and code storage products for embedded and consumer markets.
The W25Q32FW series belongs to Winbond's SpiFlash family, designed specifically for high-reliability, low-voltage embedded systems requiring fast XIP execution, robust security features, and flexible erase granularity.
FAQ
What is the JEDEC ID of the W25Q32FWSSIG and how is it used?
The W25Q32FWSSIG reports JEDEC ID EF4016 (read via 9Fh instruction), which uniquely identifies it as a Winbond 32M-bit 1.8V serial flash. This ID is used by bootloader firmware and flash programmers to auto-detect device parameters, validate compatibility before issuing erase/program commands, and select correct timing and command tables - ensuring safe initialization without manual configuration.
Does the W25Q32FWSSIG support hardware reset, and how is it implemented?
The W25Q32FWSSIG does not include a dedicated /RESET pin in its SOIC-208-mil (SS) package. Instead, reset functionality is multiplexed onto Pin 7 (/HOLD or /RESET) and enabled only when the HOLD/RST bit in Status Register-3 is set and QE=0. For reliable hardware reset, Winbond recommends the SOIC-300-mil (SF) or TFBGA (TB/TC) packages, which provide a standalone /RESET pin independent of QE configuration.
How does Quad Enable (QE) affect pin functionality on the W25Q32FWSSIG?
When the Quad Enable (QE) bit in Status Register-2 is set to 1, Pins 3 (/WP) and 7 (/HOLD) on the W25Q32FWSSIG are remapped to IO2 and IO3 respectively, enabling full Quad SPI operation. This disables hardware write protection and hold functions on those pins. To retain /WP or /HOLD functionality, QE must remain cleared (QE=0), limiting interface mode to Standard or Dual SPI.
What is the purpose of the 64-bit Unique ID in the W25Q32FWSSIG?
The W25Q32FWSSIG contains a factory-programmed, read-only 64-bit Unique ID accessible via instruction 4Bh. It provides cryptographically verifiable device identity for secure boot chain binding, anti-cloning measures, and field-level asset tracking - each W25Q32FWSSIG unit delivers a globally unique value that cannot be altered or duplicated.
Can the W25Q32FWSSIG be used in continuous read mode for XIP applications?
Yes, the W25Q32FWSSIG supports Continuous Read Mode with wrap lengths of 8/16/32/64 bytes and ≤8-clock instruction overhead, enabling true execute-in-place (XIP) operation. When configured with Quad SPI and QPI, it delivers up to 416 MHz effective throughput, allowing microcontrollers to fetch instructions directly from flash without intermediate RAM buffering - reducing latency and system memory footprint.
W25Q32FWSSIG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Winbond Electronics Corporation
- Series:
- SpiFlash®
- Package/Case:
- 8-SOIC (0.209", 5.30mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH - NOR
- Memory Size:
- 32Mbit
- Memory Organization:
- 4M x 8
- Memory Interface:
- SPI - Quad I/O, QPI
- Clock Frequency:
- 104 MHz
- Write Cycle Time - Word, Page:
- 60µs, 5ms
- Access Time:
- -
- Voltage - Supply:
- 1.65V ~ 1.95V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
W25Q32FWSSIG FAQ
1.How can I place an order for W25Q32FWSSIG through Aetrix?
Please submit a Request for Quotation (RFQ) for W25Q32FWSSIG on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for W25Q32FWSSIG reliable?
The price and inventory of W25Q32FWSSIG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for W25Q32FWSSIG is usually 5 days.
3.What payment methods are accepted for W25Q32FWSSIG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for W25Q32FWSSIG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for W25Q32FWSSIG?
W25Q32FWSSIG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your W25Q32FWSSIG order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for W25Q32FWSSIG?
For technical support, including W25Q32FWSSIG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your W25Q32FWSSIG requirements.
6.How does Aetrix verify that W25Q32FWSSIG is sourced from the original manufacturer or authorized distributors?
All W25Q32FWSSIG products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that W25Q32FWSSIG meets industry standards.
7.What is the process for return or replacement of W25Q32FWSSIG?
All W25Q32FWSSIG units undergo pre-shipment inspection (PSI). If there is an issue with W25Q32FWSSIG, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The W25Q32FWSSIG part is unused and in its original packaging.
Return procedure for W25Q32FWSSIG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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