STMicroelectronics M24C64-RMN6TP 64KB I2C EEPROM, SO8N Package for Non-Volatile Storage

STMicroelectronics M24C64-RMN6TP I2C EEPROM Overview

The STMicroelectronics M24C64-RMN6TP is a high-reliability 64KB electrically erasable programmable read-only memory (EEPROM) engineered for non-volatile data retention in space-constrained, low-power electronic systems. It integrates an industry-standard I2C (2-wire serial) interface-renowned for minimal pin count, multi-device compatibility, and low signal interference-to enable 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 IoT applications.

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, durability, and environmental compliance (including RoHS certification). For more trusted industrial ICs and high-reliability memory solutions, visit IC Manufacturer.

Technical Parameters of M24C64-RMN6TP

Key Technical Features of M24C64-RMN6TP

• Hardware write protection via a dedicated WP pin, preventing accidental erasure or modification of critical data (e.g., industrial calibration values, smart meter billing logs) in high-reliability systems-avoiding costly errors in utility or factory operations.
• 32-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 3-month energy usage data).
• 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.
• 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.
• Multi-speed I2C support (100kHz/400kHz/1MHz), offering flexibility to balance speed and power-using 1MHz for fast firmware updates in IoT gateways or 100kHz for low-power operation in battery-powered sensors.

Advantages of M24C64-RMN6TP Over Alternative Solutions

Compared to smaller EEPROMs (16KB/32KB), wide-body SO8W packages, or single-voltage memory, the M24C64-RMN6TP delivers three critical benefits for B2B designs:

First, its 64KB capacity eliminates large-scale storage gaps. Smaller 16KB/32KB EEPROMs force engineers to split data (e.g., firmware across multiple chips) or limit functionality-such as truncating 3-month energy logs in smart meters. Larger flash memory chips are overkill, consume 2?C3x more power, and require complex driver support. The 64KB capacity perfectly matches needs for storing full firmware images, extended sensor logs, or multi-device configs, avoiding both data gaps and unnecessary power use.

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. Per STMicroelectronics manufacturing data, this reduces PCB area usage by 20%, enabling smaller end products without sacrificing functionality.

Third, its voltage flexibility outperforms budget alternatives. Low-cost EEPROMs often restrict operation to 3.3V only, requiring external voltage regulators for 1.8V IoT sensors (e.g., fitness trackers) or 5V legacy industrial PLCs (e.g., older assembly line controllers). The M24C64-RMN6TP??s 1.8V?C5.5V range works with both modern low-power and legacy systems, eliminating the need for extra components. This flexibility simplifies inventory, as engineers can use one part across multiple projects instead of stocking 3.3V-only options-cutting procurement costs and design time.

Typical Applications of M24C64-RMN6TP

The M24C64-RMN6TP is engineered to solve large-scale non-volatile storage challenges in compact, low-power, and industrial systems. Its key use cases include:

• Energy and Power (Smart Meters): Storing 3-month energy usage logs (2,160 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.
• Industrial Automation: Retaining PLC operational parameters (e.g., motor speed setpoints, alarm thresholds) and 3-month production logs in factory machinery-withstanding industrial temperatures and electrical noise to ensure uninterrupted production and easy troubleshooting.
• Internet of Things (IoT) Gateways: Storing firmware update images, network credentials for 50+ connected sensors, and 30-day environmental logs-enabling over-the-air updates and continuous monitoring without data loss in remote industrial or agricultural deployments.
• Medical Devices (Portable): Preserving 2-month patient diagnostic data (e.g., blood glucose trends, ECG readings) and device firmware backups in handheld tools (e.g., portable pulse oximeters)-complying with healthcare standards for data integrity and operating reliably in temperature-variable clinical settings.
• Home Appliances (High-End Smart): Saving user profiles (e.g., smart oven cooking presets for 20+ recipes, robotic vacuum cleaning maps) and appliance firmware-delivering personalized experiences and seamless updates for premium home devices like smart refrigerators or washing machines.

Frequently Asked Questions (FAQ)

Why is the 64KB capacity a good fit for smart meters?

Smart meters need to store large, continuous datasets to avoid billing errors: 3-month energy usage logs (30-minute intervals equal 2,160 data points), plus billing cycle details and calibration values. Smaller 16KB/32KB EEPROMs force truncation of logs, leading to incomplete data and customer disputes. The 64KB capacity holds all necessary data, ensuring utilities bill accurately and resolve issues with full usage history-reducing support costs and improving customer trust.

How does the 1MHz clock frequency benefit IoT gateways?

IoT gateways often manage 50+ connected sensors, requiring frequent bulk data transfers (e.g., weekly sensor log backups or firmware updates). A 400kHz EEPROM would take 160ms to transfer 64KB of data, causing latency that delays sensor responses. The 1MHz frequency cuts transfer time to 64ms, ensuring gateways process updates quickly and maintain real-time communication with sensors-critical for applications like remote agricultural monitoring where timely data impacts crop management.

Can the M24C64-RMN6TP 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 low-power IoT sensors (e.g., soil moisture monitors), 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 and reduces design time for engineers working across mixed systems.

What is the benefit of 32-byte page write for industrial PLCs?

Industrial PLCs update process parameters (e.g., motor speed, temperature setpoints) in blocks of 24?C30 bytes to maintain production precision. The 32-byte page write lets the PLC store an entire parameter set in one I2C transaction instead of 30 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 or production downtime.

How long will the M24C64-RMN6TP retain data, and is it enough for long-life industrial equipment?

It guarantees 40 years of data retention, which far exceeds the typical 20?C25 year lifespan of industrial equipment like factory PLCs or solar inverters. This ensures critical data (e.g., production logs, calibration settings) remains intact for the equipment??s entire operational life. With 1 million write cycles, it also handles daily updates (e.g., process parameter adjustments) without degradation-reducing downtime for 24/7 factory operations and lowering the total cost of ownership for industrial end users.