W74M25JVSFIQ

The W74M25JVSFIQ is a 256 Mbit non-volatile NAND Flash device in a 16‑SOIC package from Winbond's SpiFlash® W74M authentication flash family. It combines standard HMAC‑SHA‑256 crypto acceleration with four monotonic flash counters to add multi-layer authentication and anti‑replay protection to stored data and system messages.

Designed for embedded and IoT applications that require secure code/data storage and authenticity, the device supports SPI Quad I/O, QPI and DTR interfaces with up to an 80 MHz clock, and operates from 2.7 V to 3.6 V over an ambient range of -40 °C to 85 °C.

Key Features

• Memory  256 Mbit NAND Flash organized as 32M × 8, providing non‑volatile code and data storage in a compact package.
• Security  Integrated HMAC‑SHA‑256 crypto accelerator plus four separate monotonic flash counters that are HMAC‑signed by individual secret keys for multi‑layer authentication and resistance to replay attacks.
• Interface  SPI with Quad I/O, QPI and DTR support for flexible high‑speed serial connectivity.
• Performance  Clock frequency up to 80 MHz with an access time specification of 6 ns.
• Power  Single supply operation from 2.7 V to 3.6 V for standard 3 V system compatibility.
• Environmental & Reliability  Rated for operation from -40 °C to 85 °C (TA).
• Package  16‑SOIC (0.295", 7.50 mm width) surface‑mount package for straightforward PCB integration.

Typical Applications

• Emerging IoT  Adds multi‑layered authenticity and secure storage for devices requiring protection against tampering and replay attacks.
• Mobile Accessories  Secures firmware and device identity with hardware‑backed authentication features.
• Home Automation & Smart Home  Protects device firmware and configuration data to prevent cloning and unauthorized changes.
• Industrial Control  Provides authenticated counters and secure code storage for systems that require traceable updates and anti‑cloning measures.

Unique Advantages

• Built‑in crypto accelerator: HMAC‑SHA‑256 support enables on‑device authentication without external crypto components.
• Monotonic flash counters: Four independent, HMAC‑signed counters allow timestamping and replay protection for messages and updates.
• High‑speed serial interface: SPI Quad I/O, QPI and DTR support with up to 80 MHz clock enables fast data transfer and flexible system integration.
• Wide supply range: 2.7 V to 3.6 V compatibility for common 3 V embedded platforms.
• System‑friendly package: 16‑SOIC package simplifies PCB layout and assembly for mainstream production.
• Part of a scalable family: W74M family offers multiple densities and package options for designs that may require different storage capacities.

Why Choose W74M25JVSFIQ?

The W74M25JVSFIQ positions itself as a secure, compact flash memory solution for embedded and IoT systems that need authenticated storage and anti‑replay capabilities. Its integrated HMAC‑SHA‑256 accelerator and monotonic counters reduce system complexity by moving critical authentication functions into the memory device itself.

Engineers and product designers seeking a 256 Mbit flash device with hardware authentication features, standard SPI Quad/QPI/DTR interfaces, and broad operating conditions will find the W74M25JVSFIQ suitable for applications from consumer smart home devices to industrial control modules. As a member of the W74M family, it offers a pathway to scale storage density while maintaining consistent security architecture.

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