STMicroelectronics M93C46-WMN6TP 1KB Serial EEPROM, SO8N Package with SPI Interface

STMicroelectronics M93C46-WMN6TP Serial EEPROM Overview

The STMicroelectronics M93C46-WMN6TP is a high-performance 1KB serial electrically erasable programmable read-only memory (EEPROM) engineered for reliable non-volatile data retention in space-constrained, high-speed electronic systems. It features a Serial Peripheral Interface (SPI)-a synchronous serial standard renowned for speed and simplicity-enabling seamless communication with microcontrollers, FPGAs, and digital components. This makes it a trusted solution for B2B engineers prioritizing compact design, fast data transfer, and long-term data security.

As a product from STMicroelectronics, a global leader in semiconductor innovation with decades of expertise in memory and industrial-grade components, the device meets strict quality benchmarks for performance and durability. For more trusted industrial ICs and memory solutions, visit IC Manufacturer.

Technical Parameters of M93C46-WMN6TP

Key Technical Features of M93C46-WMN6TP

• SPI write protection (sector and full-chip options), preventing accidental erasure or modification of critical data (e.g., encryption keys, factory-calibrated values) in high-security systems.
• Dual memory organization (8-bit/4-bit selectable), offering flexibility to match system data width requirements-optimizing storage efficiency for 8-bit MCUs (e.g., in IoT sensors) or 4-bit controllers (e.g., in simple appliances).
• Self-timed write cycles (up to 5ms), eliminating the need for external timing circuits and simplifying software integration-reducing design time for engineers.
• Low standby current (typical 1??A at 3V) and low active current (typical 5mA at 5V, 5MHz), optimizing power efficiency for battery-powered devices like portable medical monitors or IoT wearables.
• High-temperature tolerance (-40??C to +125??C), ensuring reliability in harsh environments like industrial factories or outdoor IoT deployments.

Advantages of M93C46-WMN6TP Over Alternative Solutions

Compared to parallel EEPROMs, low-speed serial memory, or large-footprint storage chips, the M93C46-WMN6TP delivers three critical benefits for B2B designs:

First, its SPI interface balances speed and space. Parallel EEPROMs require 8+ data/address pins and consume valuable PCB real estate, while low-speed I2C EEPROMs (1MHz max) struggle with high-speed systems. The M93C46-WMN6TP??s 5MHz SPI interface enables fast data transfers (ideal for industrial control or security cameras) while using just 3?C4 pins-saving space in compact designs like IoT gateways or wearable devices.

Second, its SO8N narrow-body package optimizes for miniaturization. Wide-body SO8 packages (e.g., SO8W) are larger and less suitable for space-constrained products, but the SO8N??s compact form factor (0.95mm pin pitch) fits into dense PCB layouts. This is critical for consumer electronics (e.g., smart watches) or IoT sensors, where board size directly impacts product design and portability.

Third, its durability outperforms consumer-grade alternatives. Most budget EEPROMs only operate up to +85??C and offer 100,000 write cycles, making them unreliable in harsh conditions. The M93C46-WMN6TP??s -40??C to +125??C range and 1 million write cycles ensure it survives temperature spikes (e.g., in industrial machinery) and frequent updates (e.g., in smart meters)-reducing product failure rates and maintenance costs.

Typical Applications of M93C46-WMN6TP

The M93C46-WMN6TP is engineered to solve non-volatile storage challenges in compact, high-speed, or harsh-environment systems. Its key use cases include:

• Security and Surveillance: Storing device IDs, encryption keys, and camera configuration settings in high-speed security cameras-enabling fast boot times and secure data access for real-time monitoring, even during power fluctuations.
• Internet of Things (IoT): Retaining network credentials, sensor calibration data, and device metadata in compact IoT gateways-balancing low power use with fast 5MHz transfers for remote asset tracking in outdoor or industrial settings.
• Industrial Automation: Storing PLC operational parameters (e.g., motor speed setpoints, alarm thresholds) and sensor logs in factory machinery-withstanding high temperatures and electrical noise to ensure uninterrupted production.
• Medical Devices: Preserving patient-specific settings (e.g., infusion pump dosages) and device serial numbers in portable medical tools-complying with healthcare standards for data integrity and operating reliably in temperature-variable clinical environments.
• Consumer Electronics: Saving user preferences (e.g., audio equalizer settings, display brightness) and device firmware versions in smart wearables-delivering consistent user experiences while fitting into compact product designs.

Frequently Asked Questions (FAQ)

Why is the 5MHz SPI clock frequency important for security cameras?

Security cameras require fast data access to load encryption keys and configuration settings during boot-up-ensuring no delay in real-time monitoring. The 5MHz frequency lets the M93C46-WMN6TP transfer data up to 5x faster than 1MHz I2C EEPROMs, eliminating boot latency and keeping cameras operational without interruptions.

How does the dual 8-bit/4-bit memory organization benefit design flexibility?

Dual organization lets engineers match the EEPROM??s data width to their microcontroller. For example, 8-bit mode works with standard 8-bit MCUs (e.g., in IoT gateways) to store large config files, while 4-bit mode optimizes storage for 4-bit controllers (e.g., in simple home appliances) to reduce memory overhead. This eliminates the need for separate EEPROMs for different projects.

Can the M93C46-WMN6TP operate in battery-powered IoT wearables?

Yes. Its low standby current (1??A typical) minimizes power draw when idle, and its 2.5V?C5.5V voltage range works with common wearable batteries (e.g., 3V coin cells). Even during active data transfers, the 5mA active current is low enough to extend battery life-critical for wearables that require long between-charge intervals.

When should I use sector write protection vs. full-chip write protection?

Use sector protection to secure specific data subsets (e.g., encryption keys in security cameras) while allowing updates to less critical data (e.g., temporary logs). Use full-chip protection for data that never needs modification (e.g., factory-set serial numbers or calibration values) to prevent accidental erasure from software glitches or electrical noise.

Why is the 40-year data retention important for industrial applications?

Industrial machinery (e.g., PLCs, motor drives) often has a lifespan of 15?C20 years. The 40-year data retention ensures critical data (e.g., calibration settings, operational parameters) remains intact for the full product lifecycle-avoiding costly re-calibration or system failures due to data loss. This also aligns with industrial standards for long-term equipment reliability.