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Winbond Electronics Corporation W25Q128FWSIF
- Part No.:
- W25Q128FWSIF
- Manufacturer:
- Winbond Electronics Corporation
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
W25Q128FWSIF.pdf
- Description:
- IC FLASH 128MBIT SPI/QUAD 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,412
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Product details
Overview
W25Q128FWSIF from Winbond is a 128M-bit (16MB) serial NOR flash memory with quad SPI and QPI interfaces, organized into 65,536 × 256-byte pages and supporting 4KB/32KB/64KB erase granularity. It operates from 1.65V to 1.95V, delivers up to 104MHz SPI clock rate (416MHz equivalent in Quad I/O), and enables execute-in-place (XIP) via Continuous Read mode - used in embedded boot code storage, firmware updates, and parameter retention for industrial controllers.
For engineers reviewing the W25Q128FWSIF datasheet, W25Q128FWSIF pinout, W25Q128FWSIF application, or W25Q128FWSIF equivalent, key selection criteria include its 1.8V supply compatibility, hardware write-protect (/WP & /HOLD) support, 64-bit unique ID, JEDEC SFDP register, and dual-role IO pins configurable via Quad Enable (QE) bit in Status Register-2.
Technical Context
The W25Q128FWSIF implements a flexible SPI command architecture supporting Standard, Dual, Quad I/O, and QPI protocols - with instruction decoding handled by dedicated command logic and status register control. Its memory array uses uniform 4KB sectors (4,096 total) and 64KB blocks (256 total), enabling fine-grained erasure for firmware partitioning and data logging.
Quad operation requires non-volatile setting of the QE bit (SR2[1]) to repurpose /WP and /HOLD as IO2 and IO3; reset behavior differs across packages - the SIF suffix denotes SOIC 208-mil with /HOLD pin (not dedicated /RESET), and no internal reset function unless QE=0 and HOLD/RST bit is set.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 128 M-bit (16 MB), organized as 65,536 × 256-byte programmable pages |
| Supply Voltage | 1.65 V to 1.95 V - enables direct integration with 1.8V I/O domains without level shifters |
| Max Clock Frequency | 104 MHz SPI; supports 416 MHz effective throughput in Quad I/O mode using Fast Read Quad I/O (EBh) |
| Erase Granularity | 4 KB sector, 32 KB block, 64 KB block, or full chip - allows selective firmware update without disturbing configuration data |
| Write/Erase Endurance | 100,000 program/erase cycles per sector - validated for field-updatable embedded applications |
| Data Retention | 20 years at +25°C - specified for long-life industrial and automotive control modules |
| Security Features | Three 256-byte OTP-lockable security registers, 64-bit unique ID, and SFDP register for auto-configurable driver initialization |
Pinout & Package
W25Q128FWSIF is supplied in an 8-pin SOIC 208-mil package (Package Code S), 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 7 functions as /HOLD only when QE = 0; when QE = 1, it becomes IO3 for Quad I/O operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| /CS (Pin 1) | Chip Select Input | Active-low enable: places device in standby (<1 µA) when high; required low-to-high transition after power-up before instruction acceptance |
| DO / IO1 (Pin 2) | Data Output / Quad I/O Line 1 | Unidirectional output in Standard SPI; bidirectional in Dual/Quad modes - carries read data or address during instruction execution |
| /WP / IO2 (Pin 3) | Write Protect Input / Quad I/O Line 2 | Hardware lock for status register writes when low; repurposed as IO2 in Quad mode (QE=1); not functional during Quad operation |
| GND (Pin 4) | Ground Reference | Primary return path for VCC and all I/O signals; must be low-impedance to maintain timing integrity at 104 MHz |
| DI / IO0 (Pin 5) | Data Input / Quad I/O Line 0 | Unidirectional input in Standard SPI; bidirectional in Dual/Quad modes - receives instructions, addresses, and program data on CLK rising edge |
| CLK (Pin 6) | Serial Clock Input | Synchronizes all SPI/QPI transfers; maximum 104 MHz frequency defines minimum instruction latency and burst throughput |
| /HOLD / IO3 (Pin 7) | Hold Input / Quad I/O Line 3 | Pauses ongoing read/write while /CS remains low; disabled in Quad mode (QE=1) and repurposed as IO3 |
| VCC (Pin 8) | Power Supply | 1.65–1.95 V supply; powers core logic, charge pumps, and I/O buffers - requires local 100 nF decoupling per datasheet layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Continuous Read Mode | Enables true XIP with ≤8-clock instruction overhead per 24-bit address - eliminates external RAM buffering for boot code execution |
| Quad Peripheral Interface (QPI) | Reduces instruction overhead via 2-clock-cycle opcodes - cuts command latency by >50% vs. standard SPI for repeated reads/writes |
| Erase/Program Suspend & Resume | Allows background firmware update while servicing real-time interrupts - suspends active erase/program to handle high-priority tasks |
| Top/Bottom Block Protection | Configurable via TB bit and BP2–BP0 - isolates bootloader region (top) from application firmware (bottom) with hardware-level write lock |
| JEDEC SFDP Register | Provides standardized, read-only parameter table for automatic driver configuration - eliminates hard-coded timing values in BSPs |
| 64-bit Unique Serial Number | Factory-programmed per unit - enables secure device identity binding in OTA update and license management systems |
Applications
| Industrial PLC Firmware Storage | Automotive ADAS Boot Memory |
|---|---|
|
Use Scenario: Storing boot firmware and safety-critical calibration tables in programmable logic controllers operating in -40°C to +85°C environments. IC Role / Device Role / Timing Role: Primary non-volatile boot memory mapped via XIP-capable microcontroller; provides deterministic 104 MHz read access during cold start. Use Value: 4KB sector erase enables incremental firmware patching without full reflash; 20-year data retention ensures calibration stability over equipment lifetime. |
Use Scenario: Holding boot code and sensor fusion algorithms for camera/radar ECUs requiring ASIL-B compliant storage with tamper resistance. IC Role / Device Role / Timing Role: Secure boot memory interfaced via Quad SPI to reduce boot time; leverages 64-bit UID and security registers for firmware signature verification. Use Value: Hardware write-protection (/WP pin + BP bits) prevents unauthorized modification of bootloader; OTP-locked security registers store cryptographic keys. |
| Medical Imaging System Parameter Archive | Smart Energy Meter Firmware Update |
|
Use Scenario: Archiving patient-specific imaging parameters and calibration profiles across multiple modalities (X-ray, ultrasound) with audit-trail requirements. IC Role / Device Role / Timing Role: Dedicated parameter storage partitioned from main application code; accessed via SPI with suspend/resume for concurrent diagnostics. Use Value: Individual sector lock (36h/39h instructions) enforces write-once-per-session policy; SFDP register auto-configures timing for multi-vendor host controllers. |
Use Scenario: Field-updating metrology firmware and tariff tables in ANSI C12.22-compliant smart meters deployed in remote utility grids. IC Role / Device Role / Timing Role: Dual-bank firmware storage with atomic swap - one bank active, one receiving OTA update via 416 MHz Quad I/O transfer. Use Value: 100,000 erase cycles support >10 years of biannual updates; low 4 mA active current extends battery backup runtime during brownout events. |
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 |
|---|---|---|---|
| MX25L12833FZNI-10G | 3V supply (2.7–3.6V), no QPI mode, 80 MHz max clock, lacks SFDP and 64-bit UID | Requires level shifting for 1.8V hosts; no auto-configurable drivers; limited security features | Select only if legacy 3V system compatibility is mandatory and QPI/XIP are unused |
| IS25LP128-JBLE | 1.8V supply, 133 MHz clock, supports octal DTR mode, includes independent /RESET pin in same SOIC-8 package | Higher bandwidth for streaming firmware; dedicated reset simplifies power sequencing but adds no new protection features | Prefer when >104 MHz throughput is needed or hardware reset independence is required without changing PCB layout |
Compared with MX25L12833FZNI-10G, W25Q128FWSIF offers 1.8V-native operation and QPI for lower latency, while IS25LP128-JBLE provides higher clock speed and integrated reset - but neither matches W25Q128FWSIF's combination of SFDP, 64-bit UID, and suspend/resume in SOIC-8.
Availability
W25Q128FWSIF is available at Aetrix Electronics and suitable for industrial PLCs, automotive ADAS ECUs, medical imaging systems, and smart energy meters requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for W25Q128FWSIF 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 NOR/NAND flash, RAM, and mobile DRAM - serving industrial, automotive, and communications markets since 1987.
The W25Q series was designed for high-reliability embedded boot and code storage, emphasizing fast XIP performance, robust security, and wide temperature operation - directly addressing needs in safety-critical and long-lifecycle applications.
FAQ
What is the package type and pin count of the W25Q128FWSIF?
The W25Q128FWSIF uses an 8-pin SOIC 208-mil package (Package Code S) with standard SPI pinout: /CS, DO (IO1), /WP (IO2), GND, DI (IO0), CLK, /HOLD (IO3), and VCC. Pin 7 serves as /HOLD when QE=0 and as IO3 in Quad mode. No /RESET pin is present in this variant.
Does the W25Q128FWSIF support execute-in-place (XIP) operation?
Yes, the W25Q128FWSIF supports true XIP via Continuous Read Mode, requiring as few as 8 clock cycles to address memory and enabling microcontrollers to execute code directly from flash. This is validated across Standard SPI, Dual I/O, Quad I/O, and QPI modes per datasheet Section 1.1 and Figure 3.
How does the Quad Enable (QE) bit affect pin functionality on the W25Q128FWSIF?
The QE bit (Status Register-2, bit 1) must be set non-volatily to enable Quad SPI mode. When QE=1, pins /WP (pin 3) and /HOLD (pin 7) become IO2 and IO3 respectively - disabling hardware write-protect and hold functions. QE=0 restores /WP and /HOLD functionality, as confirmed in Sections 4.3, 4.4, and 3.3 of the datasheet.
What security features are implemented in the W25Q128FWSIF?
The W25Q128FWSIF includes three 256-byte OTP-lockable security registers, a factory-programmed 64-bit unique ID, JEDEC SFDP register for auto-configuration, and multiple hardware/software write-protection layers (BP bits, TB, SEC, CMP, SRP). These are documented in Sections 2, 7.1, and 8.2 of the datasheet and verified for use in secure boot and firmware authentication.
Can the W25Q128FWSIF perform erase or program operations while servicing interrupts?
Yes, the W25Q128FWSIF supports Erase/Program Suspend and Resume (instructions 75h/7Ah), allowing active erase or program cycles to be paused and resumed - enabling real-time interrupt handling without data corruption. This feature is explicitly defined in Section 6.1.5 and Table 8.2.21–8.2.22 of the datasheet.
W25Q128FWSIF 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:
- 128Mbit
- Memory Organization:
- 16M 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
W25Q128FWSIF FAQ
1.How can I place an order for W25Q128FWSIF through Aetrix?
Please submit a Request for Quotation (RFQ) for W25Q128FWSIF 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 W25Q128FWSIF reliable?
The price and inventory of W25Q128FWSIF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for W25Q128FWSIF is usually 5 days.
3.What payment methods are accepted for W25Q128FWSIF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for W25Q128FWSIF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for W25Q128FWSIF?
W25Q128FWSIF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your W25Q128FWSIF 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 W25Q128FWSIF?
For technical support, including W25Q128FWSIF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your W25Q128FWSIF requirements.
6.How does Aetrix verify that W25Q128FWSIF is sourced from the original manufacturer or authorized distributors?
All W25Q128FWSIF 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 W25Q128FWSIF meets industry standards.
7.What is the process for return or replacement of W25Q128FWSIF?
All W25Q128FWSIF units undergo pre-shipment inspection (PSI). If there is an issue with W25Q128FWSIF, 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 W25Q128FWSIF part is unused and in its original packaging.
Return procedure for W25Q128FWSIF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
W25Q128FWSIF Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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M24C02-FMC6TG
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AT24CS02-SSHM-T
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93LC46BT-I/OT
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AT24C04C-SSHM-T
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AT24C08C-STUM-T
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