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Winbond Electronics Corporation W25Q32DWSSIG
- Part No.:
- W25Q32DWSSIG
- Manufacturer:
- Winbond Electronics Corporation
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
W25Q32DWSSIG.pdf
- Description:
- IC FLASH 32MBIT SPI/QUAD 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,963
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Product details
Overview
W25Q32DWSSIG from Winbond is a 1.8V 32M-bit (4MB) serial NOR flash memory IC supporting Standard/Dual/Quad SPI and QPI interfaces, organized into 16,384 × 256-byte pages with uniform 4KB sector erase capability, used for code storage, XIP execution, and firmware parameter retention in space-constrained embedded systems.
For engineers reviewing the W25Q32DWSSIG datasheet, W25Q32DWSSIG pinout, W25Q32DWSSIG application, or W25Q32DWSSIG equivalent, key selection considerations include its 104MHz SPI clock rating, quad I/O enable (QE) bit dependency, 1.7–1.95V supply range, hardware /WP and /HOLD control, and SOIC-208-mil (SS) package compatibility with legacy PCB footprints.
Technical Context
The W25Q32DWSSIG implements a multi-mode SPI interface where Standard/Dual SPI uses DI/DO pins only, while Quad SPI and QPI require QE=1 to repurpose /WP and /HOLD as IO2/IO3 - disabling their hardware protection functions during quad operation. Its status register includes volatile/non-volatile bits for block protection (BP2–BP0), top/bottom lock (TB), security register locks (LB3–LB0), and quad enable (QE).
It supports true execute-in-place (XIP) via Continuous Read Mode with ≤8-clock instruction overhead and wrap lengths of 8/16/32/64 bytes; erase operations include 4KB sector, 32KB block, 64KB block, and full chip, with suspend/resume capability for program/erase cycles. The device integrates four 256-byte security registers with OTP locking and a factory-programmed 64-bit unique ID.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 32 M-bit (4,194,304 bytes), organized as 16,384 × 256-byte pages |
| Supply Voltage | 1.7 V to 1.95 V - enables low-power operation in battery-backed or energy-efficient systems |
| SPI Clock Frequency | Up to 104 MHz - delivers up to 416 MB/s effective throughput in Quad I/O mode |
| Erase Granularity | Uniform 4 KB sectors (1,024 total), plus 32 KB and 64 KB blocks - supports fine-grained firmware partitioning |
| Endurance & Retention | 100,000 program/erase cycles minimum; 20-year data retention at +25°C - suitable for field-upgradable firmware |
| Interface Modes | Standard SPI (DI/DO), Dual SPI (IO0/IO1), Quad SPI (IO0–IO3), QPI (all four IOs for instruction + data) - selectable via QE bit and command set |
| Security Features | Hardware /WP and /HOLD pins, software-configurable BP/TB/SEC/CMP bits, four 256-byte OTP-lockable security registers, 64-bit unique ID |
Pinout & Package
W25Q32DWSSIG is packaged in an 8-pin SOIC 208-mil (package code SS), with pin 1 = /CS, pin 2 = DO (IO1), pin 3 = /WP (IO2), pin 4 = GND, pin 5 = DI (IO0), pin 6 = CLK, pin 7 = /HOLD (IO3), pin 8 = VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| /CS (Pin 1) | Chip Select Input | Active-low enable: places DO in high-Z when high; required to transition high→low after power-up before accepting instructions |
| DO (IO1) (Pin 2) | Data Output / Bidirectional I/O | Unidirectional output in Standard SPI; bidirectional IO1 in Dual/Quad/QPI modes - carries read data or instruction responses |
| /WP (IO2) (Pin 3) | Write Protect Input / Bidirectional I/O | Hardware write lock for status register when QE=0; becomes IO2 in Quad/QPI mode - disables hardware protection during quad operation |
| GND (Pin 4) | Ground Reference | Primary return path for VCC and all I/O signals; must be low-impedance for stable timing and noise immunity |
| DI (IO0) (Pin 5) | Data Input / Bidirectional I/O | Unidirectional input in Standard SPI; bidirectional IO0 in Dual/Quad/QPI modes - receives commands, addresses, and write data |
| CLK (Pin 6) | Serial Clock Input | Edge-triggered timing reference for all SPI transfers; supports Mode 0 and Mode 3; must meet tCH/tCL min/max specs per AC table |
| /HOLD (IO3) (Pin 7) | Hold Input / Bidirectional I/O | Pauses active transfers when low (only in Standard/Dual SPI); becomes IO3 in Quad/QPI - unavailable as control signal during quad operation |
| VCC (Pin 8) | Power Supply | 1.7–1.95 V nominal supply; requires local 0.1 µF ceramic decoupling near pin 8 to suppress switching noise |
Key Features
| Feature | Design Value |
|---|---|
| Quad Peripheral Interface (QPI) | Reduces instruction overhead from 8 clocks to 2 clocks per command, enabling faster XIP startup and deterministic latency in real-time boot sequences |
| Continuous Read Mode | Supports 8/16/32/64-byte wrap with ≤8-clock address setup - eliminates repeated instruction retransmission for sequential access |
| Erase/Program Suspend & Resume | Allows interruption of long erase/program cycles (e.g., during interrupt service) and resumption without data loss or timeout failure |
| 4×256-byte Security Registers | OTP-lockable storage for cryptographic keys, calibration data, or device-specific credentials - isolated from main array and protected by LB bits |
| 64-bit Unique Serial Number | Factory-programmed, non-erasable identifier enabling secure device authentication, traceability, and license binding in production firmware |
Applications
| Industrial PLC Firmware Storage | Automotive Infotainment Boot Memory |
|---|---|
|
Use Scenario: Storing bootloader, OS kernel, and application firmware in programmable logic controllers requiring field updates over CAN or Ethernet. IC Role / Device Role / Timing Role: Non-volatile code storage with XIP support and hardware write protection to prevent accidental corruption during OTA updates. Use Value: 4KB sector erase enables atomic firmware patching; 100K-cycle endurance ensures >10 years of update cycles in deployed units. |
Use Scenario: Hosting boot code and UI assets for head-unit systems where fast cold-boot (<500 ms) and secure firmware validation are mandatory. IC Role / Device Role / Timing Role: Primary boot memory accessed via Quad SPI at 104 MHz to load critical code before DRAM initialization. Use Value: 416 MB/s effective bandwidth and Continuous Read Mode reduce boot latency by ≥35% vs. standard SPI flash. |
| Medical Device Configuration Storage | IoT Edge Node Parameter Memory |
|
Use Scenario: Retaining calibrated sensor offsets, user preferences, and regulatory audit logs in portable diagnostic equipment with battery backup. IC Role / Device Role / Timing Role: Parameter storage with hardware /WP and status register protection to prevent unauthorized configuration changes. Use Value: Top/bottom block protection (TB bit) isolates calibration data in upper sectors, immune to lower-firmware updates. |
Use Scenario: Holding network credentials, OTA update metadata, and sensor calibration tables in LPWA gateways operating on coin-cell batteries. IC Role / Device Role / Timing Role: Low-voltage (1.7–1.95 V), ultra-low-power memory with <1 µA deep power-down current. Use Value: 1.8 V operation extends battery life by 2.1× compared to 3.3 V flash alternatives under equivalent duty cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial NOR flash applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MX25L3233FZUI-10G | 3.3 V supply (2.7–3.6 V), same 32 M-bit density and SOIC-208 package; supports DTR mode but lacks QPI and security registers | Requires level-shifting in 1.8 V systems; no 64-bit UID or OTP security registers - unsuitable for secure boot or device identity | Select only if system operates at 3.3 V and security features are unnecessary; not drop-in compatible due to voltage mismatch |
| S25FL132K0XMFI010 | 1.8 V supply, 32 M-bit, SOIC-208; includes SFDP and 4-byte addressing but no QPI mode or security registers | Lacks QPI instruction compression and OTP-locked security registers; supports only Standard/Dual/Quad SPI | Prefer when SFDP-based auto-configuration is required; avoid when QPI latency reduction or secure credential storage is needed |
Compared with MX25L3233FZUI-10G and S25FL132K0XMFI010, W25Q32DWSSIG uniquely combines 1.8 V operation, QPI instruction efficiency, and OTP-secured registers - making it optimal for secure, low-power, high-speed boot and firmware storage where voltage, latency, and trust are co-constrained.
Availability
W25Q32DWSSIG is available at Aetrix Electronics and suitable for industrial PLCs, automotive infotainment systems, medical diagnostics, IoT edge nodes, and consumer electronics requiring stable component supply across extended product lifecycles.
Supply support for W25Q32DWSSIG 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 serial flash, mobile DRAM, and code storage devices for embedded and industrial markets.
The W25Q series was designed specifically for high-reliability, low-voltage code storage and XIP execution in resource-constrained microcontroller-based systems - emphasizing speed, security, and long-term data integrity.
FAQ
What is the supply voltage range for W25Q32DWSSIG?
W25Q32DWSSIG operates from 1.7 V to 1.95 V only. It is not rated for 3.3 V operation, and applying voltages outside this range may cause permanent damage or unpredictable behavior. This narrow 1.8 V nominal range enables ultra-low-power design in battery-operated and energy-harvesting systems, and W25Q32DWSSIG must be powered from a dedicated 1.8 V rail with proper decoupling.
Does W25Q32DWSSIG support execute-in-place (XIP) operation?
Yes, W25Q32DWSSIG supports true XIP via Continuous Read Mode with wrap lengths of 8/16/32/64 bytes and ≤8-clock instruction overhead. When configured for Quad SPI or QPI, it achieves up to 416 MB/s effective throughput - sufficient for direct code execution in Cortex-M7/M33 and RISC-V SoCs without intermediate RAM loading. W25Q32DWSSIG's low-latency read performance makes it suitable for real-time boot and firmware hot-swap scenarios.
How does the Quad Enable (QE) bit affect pin functionality on W25Q32DWSSIG?
The QE bit (bit 1 of Status Register-2) must be set to 1 to enable Quad SPI or QPI modes. When QE=1, pins /WP (pin 3) and /HOLD (pin 7) become IO2 and IO3 respectively - disabling their hardware write-protection and hold functions. W25Q32DWSSIG retains Standard/Dual SPI operation with /WP and /HOLD active only when QE=0. This trade-off requires firmware to manage protection strategy based on interface mode.
What package type does W25Q32DWSSIG use?
W25Q32DWSSIG uses an 8-pin SOIC 208-mil package (package code SS), with standard 0.050″ lead pitch and 0.208″ body width. This footprint is pin-compatible with legacy 8-pin SPI flash devices and supports reflow soldering per J-STD-020. W25Q32DWSSIG's SS package is distinct from WSON (ZP/ZE) and 16-pin SOIC (SF) variants - verify top-side marking "W25Q32DWSSIG" to confirm SS packaging.
Can W25Q32DWSSIG store secure keys or calibration data separately from main firmware?
Yes, W25Q32DWSSIG includes four 256-byte security registers that are physically isolated from the main memory array and protected by one-time-programmable (OTP) lock bits (LB3–LB0). Once locked, these registers cannot be erased or rewritten - making them ideal for storing cryptographic keys, device-specific calibration coefficients, or regulatory compliance data. W25Q32DWSSIG also provides a factory-programmed 64-bit unique ID for device-level authentication.
W25Q32DWSSIG 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:
- 3ms
- Access Time:
- -
- Voltage - Supply:
- 1.7V ~ 1.95V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
W25Q32DWSSIG FAQ
1.How can I place an order for W25Q32DWSSIG through Aetrix?
Please submit a Request for Quotation (RFQ) for W25Q32DWSSIG 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 W25Q32DWSSIG reliable?
The price and inventory of W25Q32DWSSIG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for W25Q32DWSSIG is usually 5 days.
3.What payment methods are accepted for W25Q32DWSSIG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for W25Q32DWSSIG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for W25Q32DWSSIG?
W25Q32DWSSIG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your W25Q32DWSSIG 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 W25Q32DWSSIG?
For technical support, including W25Q32DWSSIG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your W25Q32DWSSIG requirements.
6.How does Aetrix verify that W25Q32DWSSIG is sourced from the original manufacturer or authorized distributors?
All W25Q32DWSSIG 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 W25Q32DWSSIG meets industry standards.
7.What is the process for return or replacement of W25Q32DWSSIG?
All W25Q32DWSSIG units undergo pre-shipment inspection (PSI). If there is an issue with W25Q32DWSSIG, 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 W25Q32DWSSIG part is unused and in its original packaging.
Return procedure for W25Q32DWSSIG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
W25Q32DWSSIG Tags
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