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Winbond Electronics Corporation W74M12JWSSIQ

Name: W74M12JWSSIQ
Brand: Winbond Electronics Corporation
SKU: W74M12JWSSIQ
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: W74M12JWSSIQ

Manufacturer:: Winbond Electronics Corporation

Category:: Memory

Package:: 8-SOIC (0.209", 5.30mm Width)

Datasheet:: W74M12JWSSIQ.pdf

Description:: IC FLASH 128MBIT 104MHZ 8SOIC

Quantity:: RFQ Add To RFQ list

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Product details

Overview

W74M12JWSSIQ from Winbond is a 128M-bit (16MB) serial flash memory with integrated HMAC-SHA-256 cryptographic engine, supporting standard/Dual/Quad SPI and QPI interfaces, operating at 1.7–1.95V, and delivering up to 416MHz equivalent data throughput via Quad I/O. It enables secure code execution (XIP), firmware storage, and anti-counterfeiting in embedded systems requiring hardware-rooted authentication.

For engineers reviewing the W74M12JWSSIQ datasheet, W74M12JWSSIQ pinout, W74M12JWSSIQ application, or W74M12JWSSIQ equivalent, this page provides verified pin assignments, authenticated boot flow details, monotonic counter behavior, security register layout, and JEDEC SFDP-compliant parameter access - all confirmed for the SS (SOIC 208-mil) package variant.

Technical Context

The W74M12JWSSIQ implements a dedicated authentication subsystem independent of main flash operations, using four non-volatile 256-bit Root Key registers, four volatile 256-bit HMAC Key registers, and four non-volatile 32-bit Monotonic Counters - each pairable with a unique host. Its HMAC-SHA-256 engine validates commands via signature verification before executing Write Root Key (9Bh+00h), Update HMAC Key (9Bh+01h), Increment Counter (9Bh+02h), or Request Counter (9Bh+03h).

Authentication Flash Status Register (8-bit) reports real-time execution state including BUSY (bit 0), Signature Mismatch (bit 4), HMAC Key Uninitialized (bit 5), and Fatal Error (bit 6); status polling is required before reading Tag, CounterData, or Signature fields during OP2 (96h) responses. All authentication instructions use Standard SPI format with fixed byte-length payloads (64/40/40/48 bytes respectively) and require correct TruncatedSign or full Signature validation.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Density	128 M-bit (16 MB) - supports full firmware image storage and XIP execution without external RAM buffering.
Supply Voltage	1.7 V to 1.95 V - compatible with low-voltage SoC I/O domains and eliminates level-shifting in modern embedded designs.
Max Clock Frequency	104 MHz (SPI), 208 MHz (Dual I/O), 416 MHz (Quad I/O) - enables 50 MB/s continuous read transfer rate, exceeding parallel NOR performance.
Erase/Program Endurance	100,000 cycles - ensures long-term reliability for field-upgradable firmware partitions and configuration storage.
Data Retention	20 years - validated for industrial temperature range (-40°C to +85°C), suitable for unattended deployed systems.
Security Features	HMAC-SHA-256 crypto engine, 4×256-bit Root Keys, 4×32-bit Monotonic Counters, 64-bit Unique ID, 3×256-byte OTP-locked Security Registers - provides hardware-enforced device identity and replay attack resistance.
Interface Modes	Standard SPI, Dual SPI, Quad SPI, QPI - allows flexible host controller compatibility and bandwidth scaling without changing physical layout.

Pinout & Package

W74M12JWSSIQ uses the 8-pin SOIC 208-mil package (Package Code SS), with exposed pad not present. Pin functions are electrically identical across SOIC and WSON variants per datasheet Section 4.

Pin/Terminal	Circuit Role	Design Meaning
1 /CS	Chip Select Input	Active-low enable signal; must transition high→low after power-up before instruction acceptance; controls output impedance of IO pins.
2 IO1	Bidirectional Data I/O (DO in SPI)	Used as output in Standard SPI (DO), bidirectional in Dual/Quad SPI; shares pin with DO function for legacy compatibility.
3 IO2	Bidirectional Data I/O (/WP in SPI)	Serves as Write Protect input in Standard SPI mode; becomes active I/O line in Quad SPI; requires pull-up for WP functionality.
4 GND	Ground Reference	Primary return path for VCC and all I/O signals; must be low-impedance connection to avoid timing skew or authentication failure.
5 IO0	Bidirectional Data I/O (DI in SPI)	Serial data input in Standard SPI (DI); bidirectional in Dual/Quad SPI; first bit of instruction always clocked on rising CLK edge.
6 CLK	Serial Clock Input	Master-generated clock driving all SPI transactions; timing-critical for HMAC signature validation and monotonic counter updates.
7 IO3	Bidirectional Data I/O (/HOLD in SPI)	Acts as HOLD input in Standard SPI; becomes fourth I/O line in Quad SPI; requires pull-up when used as /HOLD.
8 VCC	Power Supply	1.7–1.95 V supply; internal LDO regulates core voltage; power-down current <1 µA enables battery-backed operation.

Key Features

Feature	Design Value
Hardware Cryptographic Engine	Integrated HMAC-SHA-256 accelerator performs full signature generation/verification on-chip - eliminates host CPU overhead and prevents key exposure in software stacks.
Monotonic Counter Protection	Four independent 32-bit non-volatile counters, each paired with a unique Root Key - enables tamper-evident firmware versioning and host-specific anti-cloning enforcement.
Secure Identity Binding	64-bit Unique Serial Number + three 256-byte OTP-locked Security Registers - allows binding of cryptographic keys, certificates, and device-specific credentials at manufacturing.
XIP-Optimized Architecture	Continuous Read Mode with ≤8-clock instruction overhead per 24-bit address - enables deterministic zero-wait-state code execution directly from flash in resource-constrained MCUs.
JEDEC SFDP Compliance	Discoverable Parameters register provides standardized access to density, timing, erase granularity, and security capabilities - simplifies bootloader portability across flash vendors.

Applications

Secure Boot Loader	Firmware Over-the-Air (FOTA)
Use Scenario: MCU boots from W74M12JWSSIQ and validates signed firmware image prior to execution using HMAC-SHA-256 and monotonic counter. IC Role / Device Role / Timing Role: Trusted root-of-trust storage and cryptographic co-processor; executes authentication flow within 10–15 ms after /CS assertion. Use Value: Prevents unauthorized firmware injection by enforcing signature validity and counter monotonicity - blocks rollback and cloning attacks at hardware level.	Use Scenario: IoT gateway downloads encrypted firmware update, verifies authenticity via W74M12JWSSIQ's HMAC engine before writing to flash sectors. IC Role / Device Role / Timing Role: Secure update coordinator; stores root keys and validates host-generated signatures during OTA handshake. Use Value: Enables end-to-end firmware integrity without exposing private keys to host processor - reduces attack surface in connected devices.
Industrial HMI Authentication	Medical Device Firmware Vault
Use Scenario: Touchscreen HMI panel reads W74M12JWSSIQ's Unique ID and counter value to authenticate against cloud license server before enabling premium features. IC Role / Device Role / Timing Role: Hardware-bound identity token; counter increments on each licensed session start to prevent credential reuse. Use Value: Enforces subscription-based feature unlocking with cryptographically verifiable usage history - no software-only license checks required.	Use Scenario: MRI controller board stores FDA-approved firmware images and cryptographic keys in W74M12JWSSIQ, with write-protection enforced by OTP-locked security registers. IC Role / Device Role / Timing Role: Regulated firmware vault; uses Power Supply Lock-Down and Top/Bottom array protection to prevent accidental or malicious overwrite. Use Value: Meets IEC 62304 Class C requirements for immutable firmware storage and traceable update history via monotonic counter logging.

Secure Boot Loader

Firmware Over-the-Air (FOTA)

Use Scenario: MCU boots from W74M12JWSSIQ and validates signed firmware image prior to execution using HMAC-SHA-256 and monotonic counter.

IC Role / Device Role / Timing Role: Trusted root-of-trust storage and cryptographic co-processor; executes authentication flow within 10–15 ms after /CS assertion.

Use Value: Prevents unauthorized firmware injection by enforcing signature validity and counter monotonicity - blocks rollback and cloning attacks at hardware level.

Use Scenario: IoT gateway downloads encrypted firmware update, verifies authenticity via W74M12JWSSIQ's HMAC engine before writing to flash sectors.

IC Role / Device Role / Timing Role: Secure update coordinator; stores root keys and validates host-generated signatures during OTA handshake.

Use Value: Enables end-to-end firmware integrity without exposing private keys to host processor - reduces attack surface in connected devices.

Industrial HMI Authentication

Medical Device Firmware Vault

Use Scenario: Touchscreen HMI panel reads W74M12JWSSIQ's Unique ID and counter value to authenticate against cloud license server before enabling premium features.

IC Role / Device Role / Timing Role: Hardware-bound identity token; counter increments on each licensed session start to prevent credential reuse.

Use Value: Enforces subscription-based feature unlocking with cryptographically verifiable usage history - no software-only license checks required.

Use Scenario: MRI controller board stores FDA-approved firmware images and cryptographic keys in W74M12JWSSIQ, with write-protection enforced by OTP-locked security registers.

IC Role / Device Role / Timing Role: Regulated firmware vault; uses Power Supply Lock-Down and Top/Bottom array protection to prevent accidental or malicious overwrite.

Use Value: Meets IEC 62304 Class C requirements for immutable firmware storage and traceable update history via monotonic counter logging.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
Winbond W74M12JWZPIQ	Same die, WSON 8x6-mm (ZE) package; identical electrical specs and security features; 0.5 mm pitch vs SOIC's 1.27 mm.	Preferred for space-constrained PCBs where thermal dissipation and footprint size outweigh hand-soldering needs.	Select W74M12JWZPIQ when board area is critical and reflow assembly is available; pinout and command set are fully identical.
Macronix MX25L12835FZNI-10G	No integrated HMAC engine; relies on external MCU for authentication; supports only standard/Dual/Quad SPI (no QPI); 3.3 V supply only.	Suitable for cost-sensitive designs where security is implemented in software or companion secure element.	Choose MX25L12835FZNI-10G only if cryptographic acceleration is handled externally and 3.3 V rail is available - no hardware root-of-trust capability.

Compared with W74M12JWZPIQ, W74M12JWSSIQ offers identical security and timing performance but enables manual inspection and rework via SOIC leads; versus MX25L12835FZNI-10G, W74M12JWSSIQ delivers hardware-enforced authentication without host CPU involvement or voltage translation.

Availability

W74M12JWSSIQ is available at Aetrix Electronics and suitable for secure boot loader implementation, firmware over-the-air (FOTA) updates, industrial HMI authentication, medical device firmware vaulting, and automotive telematics modules requiring stable component supply and long-term lifecycle support.

Supply support for W74M12JWSSIQ 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 industrial markets.

The W74M product line was designed specifically for systems demanding hardware-rooted security, combining high-speed Quad SPI performance with on-die HMAC-SHA-256 authentication - targeting IoT edge nodes, medical devices, and industrial controllers where firmware integrity is mission-critical.

FAQ

What is the primary security function enabled by the W74M12JWSSIQ's HMAC-SHA-256 engine?

The W74M12JWSSIQ's HMAC-SHA-256 engine enables hardware-based mutual authentication between host and flash, using four sets of non-volatile Root Keys and volatile HMAC Keys to validate commands like Write Root Key (9Bh+00h) and Increment Monotonic Counter (9Bh+02h). This prevents unauthorized firmware modification and device cloning by ensuring every authenticated operation is cryptographically signed and time-bound via monotonic counters - a capability intrinsic to the W74M12JWSSIQ and not dependent on external processors.

Does the W74M12JWSSIQ support execute-in-place (XIP) operation, and what interface modes enable it?

Yes, the W74M12JWSSIQ supports true XIP operation via Continuous Read Mode, which minimizes instruction overhead to ≤8 clocks per 24-bit address fetch. This is enabled in Dual SPI and Quad SPI modes using Fast Read Dual/Quad I/O instructions, and also in QPI mode with 2-clock instruction cycle support. The W74M12JWSSIQ achieves up to 416 MHz effective throughput in Quad I/O, allowing deterministic zero-wait-state code execution directly from flash - a feature validated in the W74M12JWSSIQ's functional block diagram and timing specifications.

How many independent authentication domains does the W74M12JWSSIQ support, and how are they isolated?

The W74M12JWSSIQ supports four independent authentication domains, each with its own 256-bit non-volatile Root Key, 256-bit volatile HMAC Key, and 32-bit non-volatile Monotonic Counter. Domains are isolated by Counter Address (8-bit field in OP1/OP2 instructions), and access control is enforced at the hardware level: only commands signed with the correct HMAC key can modify or read a specific counter, and Root Key writes are permanently disabled after initialization - a design confirmed in Sections 6.1.1–6.1.4 of the W74M12JWSSIQ datasheet.

What package type and pin count does the W74M12JWSSIQ use, and are pin functions consistent across variants?

The W74M12JWSSIQ uses the 8-pin SOIC 208-mil package (Package Code SS), with pinout matching Figure 1a in the datasheet: /CS (pin 1), IO1 (pin 2), IO2 (pin 3), GND (pin 4), IO0 (pin 5), CLK (pin 6), IO3 (pin 7), VCC (pin 8). Pin functions are electrically identical across SOIC (SS), WSON 6x5-mm (ZP), and WSON 8x6-mm (ZE) variants - confirmed in "Pin Description SOIC 208-mil, WSON 6x5-mm/ 8x6-mm" (page 4) and PACKAGE SPECIFICATIONS (pages 25–27) of the W74M12JWSSIQ documentation.

Can the W74M12JWSSIQ's security registers be reprogrammed after initial setup, and what protections apply?

Three 256-byte Security Registers in the W74M12JWSSIQ are protected by OTP (One-Time Programmable) locks - once programmed and locked, their contents cannot be altered or erased. Root Keys are written permanently via Write Root Key Register (9Bh+00h) and become inaccessible via SPI after successful execution. Monotonic Counters increment only via authenticated commands and cannot be decremented or reset. These protections are hardware-enforced and documented in FEATURES (page 3) and Section 6.1.3 (Operations Allowed / Disallowed) of the W74M12JWSSIQ datasheet.

W74M12JWSSIQ Specifications

Product attributes: Attribute value

Manufacturer:: Winbond Electronics Corporation

Series:: SpiFlash®

Package/Case:: 8-SOIC (0.209", 5.30mm Width)

Packaging:: Tube

Product Status:: Active

Programmable:: Not Verified

Memory Type:: Non-Volatile

Memory Format:: FLASH

Technology:: FLASH - NAND

Memory Size:: 128Mbit

Memory Organization:: 16M x 8

Memory Interface:: -

Clock Frequency:: 104 MHz

Write Cycle Time - Word, Page:: -

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

W74M12JWSSIQ FAQ

1.How can I place an order for W74M12JWSSIQ through Aetrix?

Please submit a Request for Quotation (RFQ) for W74M12JWSSIQ 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 W74M12JWSSIQ reliable?

The price and inventory of W74M12JWSSIQ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for W74M12JWSSIQ is usually 5 days.

3.What payment methods are accepted for W74M12JWSSIQ?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for W74M12JWSSIQ transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for W74M12JWSSIQ?

W74M12JWSSIQ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your W74M12JWSSIQ 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 W74M12JWSSIQ?

For technical support, including W74M12JWSSIQ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your W74M12JWSSIQ requirements.

6.How does Aetrix verify that W74M12JWSSIQ is sourced from the original manufacturer or authorized distributors?

All W74M12JWSSIQ 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 W74M12JWSSIQ meets industry standards.

7.What is the process for return or replacement of W74M12JWSSIQ?

All W74M12JWSSIQ units undergo pre-shipment inspection (PSI). If there is an issue with W74M12JWSSIQ, 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 W74M12JWSSIQ part is unused and in its original packaging.

Return procedure for W74M12JWSSIQ:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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