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Winbond Electronics Corporation W25Q32FWSSIQ
- Part No.:
- W25Q32FWSSIQ
- Manufacturer:
- Winbond Electronics Corporation
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
W25Q32FWSSIQ.pdf
- Description:
- IC FLASH 32MBIT SPI/QUAD 8SOIC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
W25Q32FWSSIQ from Winbond is a 1.8V, 32M-bit (4MB) serial NOR flash memory with Dual/Quad SPI and QPI interfaces, organized as 32,768 × 256-byte pages. It supports 104MHz single-line SPI, 208MHz Dual I/O, and 416MHz Quad I/O read speeds, enabling execute-in-place (XIP) operation in embedded microcontrollers for code storage and firmware updates. Its 4KB uniform sectors, hardware write protection (/WP, /HOLD), and 64-bit unique ID support secure, flexible data and parameter storage in space-constrained IoT and industrial control systems.
For engineers reviewing the W25Q32FWSSIQ datasheet, W25Q32FWSSIQ pinout, W25Q32FWSSIQ application, or W25Q32FWSSIQ equivalent, key selection criteria include 1.65–1.95V supply compatibility, SOIC-8 208-mil (SS) package mapping, Quad Enable (QE) bit configuration for IO2/IO3 remapping, and JEDEC-compliant SFDP register access for dynamic parameter discovery.
Technical Context
The W25Q32FWSSIQ implements a standard SPI Mode 0/3 interface with configurable Dual/Quad I/O and QPI modes, where Quad operation requires non-volatile setting of the QE bit in Status Register-2. Its command set includes Fast Read Dual/Quad I/O (3Bh/6Bh), Quad Input Page Program (32h), and sector/block erase (20h/52h/D8h) with suspend/resume capability (75h/7Ah).
Internal architecture features a 256-byte page buffer, SFDP register for discoverable parameters, three 256-byte security registers with OTP locks, and status register bits (BP2–BP0, TB, SEC, CMP, SRP0/SRP1) enabling granular 4KB-sector to full-array hardware and software write protection independent of power state.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 32 M-bit (4 MB), organized as 32,768 × 256-byte programmable pages |
| Supply Voltage | 1.65 V to 1.95 V - enables direct integration with 1.8V logic domains without level shifting |
| Max Clock Frequency | 104 MHz (SPI), 208 MHz equiv. (Dual I/O), 416 MHz equiv. (Quad I/O) - supports ≥50 MB/s continuous read throughput |
| Erase Granularity | 4 KB sector / 32 KB block / 64 KB block / chip erase - allows precise firmware partitioning and field update flexibility |
| Endurance & Retention | 100,000 program/erase cycles per sector; >20 years data retention at 25°C - suitable for long-life industrial logging |
| Security Features | 64-bit unique ID, three 256-byte OTP-lockable security registers, SFDP register - enables device authentication and secure boot key storage |
| Interface Modes | Standard SPI, Dual SPI, Quad SPI, QPI - selectable via instruction set; QE bit controls IO2/IO3 remapping |
Pinout & Package
W25Q32FWSSIQ uses the 8-pin SOIC 208-mil package (Package Code SS), with exposed pad not present. Pin functions are electrically identical across SOIC/VSOP 208-mil variants per datasheet Section 3.3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 /CS | Chip Select Input | Active-low enable; high-impedance DO output and standby current when high; required high-to-low transition after power-up to accept commands |
| 2 DO (IO1) | Data Output / Bidirectional I/O | Unidirectional output in Standard SPI; bidirectional in Dual/Quad SPI; used for status/data reads on falling CLK edge |
| 3 /WP (IO2) | Write Protect Input / Bidirectional I/O | Hardware lock for status register writes when active low; becomes IO2 in Quad mode (QE=1); not available in QPI |
| 4 GND | Ground Reference | Primary return path for VCC and all I/O signals; must be low-impedance connection for timing integrity |
| 5 DI (IO0) | Data Input / Bidirectional I/O | Unidirectional input in Standard SPI; bidirectional in Dual/Quad SPI; carries instructions, addresses, and data on rising CLK edge |
| 6 CLK | Serial Clock Input | Master-generated timing signal; supports Mode 0 (CPOL=0, CPHA=0) and Mode 3 (CPOL=1, CPHA=1); max 104 MHz |
| 7 /HOLD (IO3) | Hold Input / Bidirectional I/O | Pauses ongoing SPI transfer when pulled low; becomes IO3 in Quad mode (QE=1); not available in QPI |
| 8 VCC | Power Supply | 1.65–1.95 V supply; internal charge pumps generate programming voltages; decoupling capacitor required per datasheet Figure 57 |
Key Features
| Feature | Design Value |
|---|---|
| Continuous Read Mode | As few as 8 clocks to address memory with wrap lengths of 8/16/32/64 bytes - minimizes instruction overhead for XIP execution |
| Quad Peripheral Interface (QPI) | 2-clock instruction cycle reduces command latency vs. standard SPI - enables faster sequential reads in high-performance boot scenarios |
| Erase/Program Suspend & Resume | Allows background erase or program to pause for higher-priority reads - critical for real-time firmware update without service interruption |
| Top/Bottom Block Protection | Configurable via TB bit and BP2–BP0 - isolates bootloader region (top) from application code (bottom) with hardware-enforced write locks |
| Volatile & Non-Volatile Status Bits | SRP0/SRP1, WPS, QE, DRV0/DRV1, HOLD/RST bits stored in both volatile and non-volatile latches - ensures consistent behavior across power cycles |
| JEDEC Compliance | Manufacturer ID (EFh), Device ID (4016h), SFDP register (5Ah), and Unique ID (4Bh) - enables automated flash detection and configuration in UEFI/BMC environments |
Applications
| Industrial PLC Firmware Storage | IoT Edge Device OTA Updates |
|---|---|
|
Use Scenario: Storing and executing ladder logic firmware in programmable logic controllers with strict uptime requirements. IC Role / Device Role / Timing Role: NOR flash memory providing XIP-capable code storage; interfaces via Quad SPI to ARM Cortex-M7 host at 80 MHz clock. Use Value: 4KB sector erase enables atomic firmware patching without disrupting runtime logic execution; 100K endurance supports 10+ years of field updates. |
Use Scenario: Secure over-the-air firmware delivery and validation in battery-powered smart sensors deployed in remote locations. IC Role / Device Role / Timing Role: Trusted code storage with 64-bit unique ID and OTP-locked security registers for cryptographic key binding. Use Value: Hardware write protection (/WP pin + BP bits) prevents unauthorized firmware rollback; SFDP register enables automatic driver adaptation across flash variants. |
| Medical Diagnostic Imaging Bootloader | Automotive ADAS Camera Module |
|
Use Scenario: Hosting certified bootloader and safety monitor code in FDA-cleared imaging equipment requiring ASIL-B compliance. IC Role / Device Role / Timing Role: Primary boot memory accessed via QPI mode for deterministic <50 µs cold-start latency; stores signed firmware images. Use Value: 20-year data retention guarantees code integrity over product lifetime; individual sector lock (36h/39h) isolates safety-critical partitions from application updates. |
Use Scenario: Storing camera calibration data, ISP firmware, and vehicle-specific configuration in surround-view systems. IC Role / Device Role / Timing Role: Parameter and code storage interfaced via Dual SPI to TI TDA3x SoC; leverages /HOLD for bus arbitration with CAN controller. Use Value: 32KB block erase allows fast reprogramming of calibration tables during dealer service; 1.8V operation matches SoC I/O voltage domain. |
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 | 32 M-bit, 1.65–2.0 V, 104 MHz SPI, SOIC-8; lacks QPI mode and SFDP register; only Standard/Dual SPI | No QPI or continuous read wrap - limits XIP efficiency in high-throughput boot paths | Select when QPI and SFDP are unnecessary and cost sensitivity outweighs feature parity |
| S25FL032P0XMFI001 | 32 M-bit, 2.7–3.6 V, 80 MHz SPI, SOIC-16; includes HyperBus interface option; requires 3.3V supply | Higher voltage incompatible with 1.8V SoCs; HyperBus offers higher bandwidth but needs dedicated controller | Choose only if system uses 3.3V domain and requires HyperFlash compatibility or higher sustained write throughput |
Compared with W25Q32FWSSIQ, MX25L3233FZUI-10G omits QPI and SFDP-reducing boot flexibility and auto-configuration capability-while S25FL032P0XMFI001 mandates 3.3V operation and adds HyperBus complexity, making both less suitable for 1.8V, QPI-enabled, field-upgradable embedded designs.
Availability
W25Q32FWSSIQ is available at Aetrix Electronics and suitable for industrial PLCs, IoT edge gateways, medical imaging devices, automotive camera modules, and consumer audio systems requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for W25Q32FWSSIQ 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 flash memory solutions for embedded, communications, and computing markets.
The W25Q series targets high-reliability, low-voltage embedded systems requiring robust code storage, secure firmware updates, and multi-interface flexibility-designed specifically for MCU boot, XIP execution, and parameter retention in constrained environments.
FAQ
What is the operating voltage range for the W25Q32FWSSIQ?
The W25Q32FWSSIQ operates from 1.65 V to 1.95 V. This narrow 1.8V nominal range ensures compatibility with modern ultra-low-power microcontrollers and eliminates the need for external level shifters. Operation outside this range may cause unreliable read/write behavior or permanent damage, as confirmed in Section 9.2 of the datasheet. The device's internal charge pumps generate required high-voltage programming pulses without external components.
Does the W25Q32FWSSIQ support execute-in-place (XIP) functionality?
Yes, the W25Q32FWSSIQ supports true XIP through its Continuous Read Mode and Quad SPI/QPI interfaces. With as few as 8 clocks to initiate a read and wrap lengths up to 64 bytes, it delivers deterministic latency for instruction fetches. Verified performance shows ≥50 MB/s sustained read throughput in Quad I/O mode, enabling direct code execution from flash in Cortex-M and RISC-V applications without RAM shadowing.
How is Quad SPI mode enabled on the W25Q32FWSSIQ?
Quad SPI mode is enabled by setting the Quad Enable (QE) bit in Status Register-2 (bit 1), which must be written non-volatily using instruction 31h. When QE = 1, pins /WP (pin 3) and /HOLD (pin 7) become IO2 and IO3 respectively, enabling four-bit-wide data transfers. This remapping is irreversible without power cycle unless volatile QE is used, and is mandatory before issuing Quad I/O commands like 6Bh (Fast Read Quad Output).
What package type does W25Q32FWSSIQ use, and is it pin-compatible with other W25Q32FW variants?
W25Q32FWSSIQ uses the 8-pin SOIC 208-mil package (Package Code SS), matching the pinout of W25Q32FWSTIQT (VSOP) and W25Q32FWXGIG (XSON). All share identical pin functions per Section 3.3 of the datasheet. However, it is not pin-compatible with 16-pin SOIC (SF) or TFBGA (TB/TC) variants due to differing pin counts, /RESET pin presence, and ball/pad layouts.
Can the W25Q32FWSSIQ's security features prevent unauthorized firmware modification?
Yes, the W25Q32FWSSIQ provides layered security: hardware write protection via /WP pin and status register bits (BP2–BP0, TB, SEC), OTP-lockable security registers (3 × 256 bytes), and a 64-bit unique ID. These allow immutable bootloader locking, cryptographic key storage, and device identity binding. Security register erasure requires instruction 44h and is protected by SRP bits-preventing tampering without physical access and proper unlock sequences.
W25Q32FWSSIQ 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
W25Q32FWSSIQ FAQ
1.How can I place an order for W25Q32FWSSIQ through Aetrix?
Please submit a Request for Quotation (RFQ) for W25Q32FWSSIQ 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 W25Q32FWSSIQ reliable?
The price and inventory of W25Q32FWSSIQ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for W25Q32FWSSIQ is usually 5 days.
3.What payment methods are accepted for W25Q32FWSSIQ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for W25Q32FWSSIQ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for W25Q32FWSSIQ?
W25Q32FWSSIQ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your W25Q32FWSSIQ 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 W25Q32FWSSIQ?
For technical support, including W25Q32FWSSIQ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your W25Q32FWSSIQ requirements.
6.How does Aetrix verify that W25Q32FWSSIQ is sourced from the original manufacturer or authorized distributors?
All W25Q32FWSSIQ 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 W25Q32FWSSIQ meets industry standards.
7.What is the process for return or replacement of W25Q32FWSSIQ?
All W25Q32FWSSIQ units undergo pre-shipment inspection (PSI). If there is an issue with W25Q32FWSSIQ, 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 W25Q32FWSSIQ part is unused and in its original packaging.
Return procedure for W25Q32FWSSIQ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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