STMicroelectronics M24256E-FMN6TP I2C EEPROM Overview
The STMicroelectronics M24256E-FMN6TP is a high-reliability 256KB electrically erasable programmable read-only memory (EEPROM) engineered for non-volatile data retention in large-scale, space-constrained electronic systems. It integrates an industry-standard I2C (2-wire serial) interface-renowned for low pin count and multi-device compatibility-enabling seamless communication with microcontrollers, industrial PLCs, and smart energy devices. This makes it a trusted solution for B2B engineers prioritizing high storage capacity, miniaturization, and long-term data security across industrial, energy, and medical applications.
كمنتج من STMicroelectronics - وهي شركة رائدة عالميًا في ابتكار أشباه الموصلات مع عقود من الخبرة في مجال الذاكرة والمكونات الصناعية - يلبي الجهاز معايير الجودة الصارمة للأداء والمتانة والامتثال البيئي (بما في ذلك شهادة RoHS). لمزيد من الدوائر المتكاملة الصناعية الموثوق بها وحلول الذاكرة عالية الموثوقية، تفضل بزيارة الشركة المصنعة للدوائر المتكاملة.
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Technical Parameters of M24256E-FMN6TP
| المعلمة | المواصفات |
|---|---|
| سعة الذاكرة | 256KB (262144 x 8 bits) |
| واجهة الاتصال | I2C (2-wire serial), supports 100kHz (Standard) / 400kHz (Fast) / 1MHz (Fast-Plus) modes |
| الحد الأقصى لتردد الساعة | 1 ميجا هرتز |
| نطاق جهد التشغيل | 1.8 فولت إلى 5.5 فولت |
| نوع الحزمة | SO8N (8 سنون مخطط صغير، جسم ضيق) |
| أبعاد العبوة | 5.0 مم × 6.0 مم، 0.95 مم، درجة الدبوس 0.95 مم |
| نطاق درجة حرارة التشغيل | -40 درجة مئوية إلى +85 درجة مئوية |
| الحد الأدنى لدورات الكتابة | 1,000,000 دورة 1,000,000 دورة |
| الحد الأدنى للاحتفاظ بالبيانات | 40 عاماً |
| حجم كتابة الصفحة | 64 bytes |
| اكتب الحماية | حماية القطاع وكامل الرقاقة من خلال دبوس WP |
| الامتثال | متوافق مع RoHS 2 |
Key Technical Features of M24256E-FMN6TP
- حماية القطاع وكامل الرقاقة من الكتابة على الأجهزة via a dedicated WP pin, preventing accidental erasure or modification of critical data (e.g., industrial calibration values, medical device patient records) in high-reliability systems-avoiding costly downtime or data breaches.
- 64-byte page write capability, enabling efficient block data transfers to reduce system latency and lower power consumption during bulk updates (e.g., storing monthly industrial production logs or 6-month energy usage data).
- Multi-speed I2C support (100kHz/400kHz/1MHz), offering flexibility to match system bandwidth needs-using 1MHz for fast firmware updates in IoT gateways or 100kHz for low-power operation in battery-powered sensors.
- Low standby current (typical 1??A at 3V) and low active current (typical 1mA at 3V, 1MHz), optimizing power efficiency for battery-powered devices like portable medical monitors or remote IoT sensors-extending operational life without frequent recharging.
- Compact SO8N package (0.95mm pin pitch), reducing PCB space usage by 20% vs. wide-body SO8W alternatives-critical for miniaturized designs like wireless IoT gateways or handheld medical tools where board space is limited.
Advantages of M24256E-FMN6TP Over Alternative Solutions
Compared to smaller EEPROMs (64KB/128KB), wide-body SO8W packages, or single-speed I2C memory, the M24256E-FMN6TP delivers three critical benefits for B2B designs:
First, its 256KB capacity eliminates large-scale storage compromises. Smaller 64KB/128KB EEPROMs force engineers to split data (e.g., firmware across multiple chips) or limit functionality-such as truncating 6-month energy logs in smart meters. Larger flash memory chips are overkill, consume 2?C3x more power, and require complex driver support. The 256KB capacity perfectly matches needs for storing full firmware images, extended sensor logs, or multi-device configs, avoiding both data gaps and unnecessary power use.
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Second, its SO8N package enables superior miniaturization. Wide-body SO8W packages (1.27mm pin pitch) occupy more PCB space, making them impractical for compact designs like wireless IoT gateways or portable ultrasound probes. The SO8N??s 0.95mm pin pitch lets engineers fit the EEPROM alongside other components (e.g., microcontrollers, extra sensors) in space-constrained layouts-critical for devices deployed in tight industrial enclosures or handheld medical kits.
Third, its flexibility outperforms budget alternatives. Low-cost EEPROMs often restrict operation to 3.3V only (requiring external regulators for 1.8V/5V systems) and offer only single-speed I2C (limiting either speed or power efficiency). The M24256E-FMN6TP??s 1.8V?C5.5V range works with legacy 5V industrial PLCs and modern 1.8V wearables, while its multi-speed I2C support balances speed and power-reducing maintenance costs and inventory complexity for end users like factories, utility companies, or medical facilities.
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Typical Applications of M24256E-FMN6TP
The M24256E-FMN6TP is engineered to solve large-scale non-volatile storage challenges in industrial, energy, and medical systems. Its key use cases include:
- Energy and Power (Smart Meters): Storing 6-month energy usage logs (4,320 data points for 30-minute intervals), billing information, and meter calibration data-ensuring accurate tracking even during power disruptions and simplifying utility billing for thousands of households.
- الأتمتة الصناعية: Retaining complex PLC operational parameters (e.g., multi-step assembly line setpoints) and 6-month production logs in factory machinery-withstanding industrial temperatures and electrical noise to ensure uninterrupted production and easy troubleshooting.
- الأجهزة الطبية (المحمولة): Preserving 3-month patient diagnostic data (e.g., blood pressure trends, ECG readings) and full device firmware backups in handheld tools (e.g., portable defibrillators, pulse oximeters)-complying with healthcare standards for data integrity and supporting continuity of care during power outages.
- بوابات إنترنت الأشياء (IoT): Storing firmware update images, network credentials for 100+ connected sensors, and 60-day environmental logs-enabling over-the-air updates and continuous monitoring without data loss in remote industrial or agricultural deployments.
- Home Appliances (High-End Smart): Saving complex user profiles (e.g., smart oven cooking presets for 50+ recipes, robotic vacuum cleaning maps for multi-floor homes) and full appliance firmware-delivering personalized experiences and seamless updates for premium home devices like smart refrigerators.
الأسئلة المتداولة (FAQ)
Why is the 256KB capacity a good fit for smart meters?
Smart meters need to store large, continuous datasets: 6-month energy usage logs (30-minute intervals equal 4,320 data points), billing cycle information, and calibration values. 64KB/128KB EEPROMs can??t hold all this data without truncation, leading to billing errors. The 256KB capacity ensures meters track usage accurately for full semi-annual billing cycles, avoiding customer disputes and reducing utility company support costs.
How does the 64-byte page write feature benefit industrial PLCs?
Industrial PLCs update process parameters (e.g., motor speed, temperature setpoints) in blocks of 32?C48 bytes to maintain production precision. The 64-byte page write lets the PLC store an entire parameter set in one I2C transaction instead of 48 separate ones. This cuts power use by 45% (vs. single-byte writes) and reduces latency to 1ms per update-critical for time-sensitive processes like assembly line monitoring, where delays cause product defects.
Can the M24256E-FMN6TP operate in both 1.8V IoT sensors and 5V industrial PLCs?
Yes. Its 1.8V?C5.5V operating range eliminates the need for separate EEPROMs for different voltage platforms. For 1.8V IoT humidity sensors, it runs directly from the battery without a regulator, saving space and cost. For 5V legacy industrial PLCs, it integrates seamlessly with older microcontrollers, avoiding the need to redesign PCBs or add voltage converters. This flexibility simplifies inventory management for engineers working across multiple projects.
Why is the SO8N package??s small size important for portable medical devices?
Portable medical devices (e.g., handheld ECG monitors) need to be compact and lightweight for use in clinics or emergency settings. The SO8N package??s 0.95mm pin pitch reduces PCB space by 20% vs. wide-body SO8W packages, letting designers shrink the device??s overall size. This makes the medical tool easier to carry, improves patient comfort during use, and fits in tight spaces like ambulance medical kits.
How long will the M24256E-FMN6TP retain data, and is it enough for long-life industrial equipment?
It guarantees 40 years of data retention, far exceeding the typical 20?C25 year lifespan of industrial equipment (e.g., factory PLCs, solar inverters). This ensures critical data (e.g., production logs, calibration settings) remains intact for the product??s entire operational life. With 1 million write cycles, it also handles daily updates (e.g., process adjustments) without degradation-meeting industrial reliability standards and reducing downtime for 24/7 factory operations.