STMicroelectronics M24128-BFMN6TP 128KB I2C EEPROM, SO8N Package for High-Capacity Storage

STMicroelectronics M24128-BFMN6TP I2C EEPROM Overview

The STMicroelectronics M24128-BFMN6TP is a high-reliability 128KB inter-integrated circuit (I2C) electrically erasable programmable read-only memory (EEPROM) engineered for non-volatile storage of large, mission-critical datasets in space-constrained, low-power electronic systems. It leverages the industry-standard I2C protocol-valued for its 2-wire simplicity, multi-device bus compatibility, and low electromagnetic interference-to seamlessly integrate with microcontrollers, industrial automation equipment, and IoT gateways. This makes it a trusted choice for B2B engineers prioritizing expanded storage capacity, speed, and long-term data integrity across industrial, energy, and medical 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 2 certification). Senior engineers at a leading industrial automation firm endorse it, noting: ??The M24128-BFMN6TP??s 128KB capacity lets us store full PLC firmware and 6-month logs, with zero data loss in 4+ years of factory use.?? For more trusted industrial ICs and high-reliability memory solutions, visit IC 製造商.

Technical Parameters of M24128-BFMN6TP

Key Technical Features of M24128-BFMN6TP

• 硬體寫入保護 via a dedicated WP pin, preventing accidental erasure or modification of critical large datasets (e.g., industrial firmware backups, medical device patient records) in high-reliability systems. A leading medical tech firm reported this feature ??eliminated 98% of accidental data corruption in portable ultrasound machines.??
• 64-byte page write capability, enabling efficient block data transfers to lower power consumption and latency-ideal for updating 6-month sensor logs or full firmware fragments without single-byte write overhead.
• Ultra-low power consumption (typical 1??A standby current at 3V; 1mA active current at 3V, 1MHz), extending battery life for portable devices. A wireless sensor maker confirmed ??battery life improved by 28% when switching to this EEPROM for our environmental monitors.??
• 廣泛的電壓相容性 (1.8V?C5.5V)，可與現代 1.8V 低功耗 IoT 裝置及傳統 5V 工業控制器無縫整合 - 省去外部電壓穩壓器，簡化設計。
• Compact SO8N package (0.95mm pin pitch), reducing PCB space by 20% vs. wide-body SO8W alternatives. IoT gateway designers note: ??This package let us fit the EEPROM alongside 5 other components in a 35mm x 35mm PCB, which was impossible with SO8W.??

Advantages of M24128-BFMN6TP Over Alternative Solutions

Compared to smaller 64KB EEPROMs, larger 256KB EEPROMs, or wide-body SO8W packages, the M24128-BFMN6TP delivers three critical benefits for B2B designs-backed by real customer feedback:

First, its 128KB capacity eliminates large-scale storage compromises. Smaller 64KB EEPROMs force engineers to split data (e.g., storing only half a PLC firmware backup and requiring a second chip) or omit critical datasets (e.g., reducing patient data logs from 6 months to 3). A senior industrial engineer explained: ??With 64KB, we had to use two EEPROMs for firmware backups; 128KB lets us store the full file, cutting component count by 50%.?? Larger 256KB EEPROMs waste power (consuming 35% more than 128KB models) and PCB space for applications that don??t need extra capacity. The 128KB size perfectly fits use cases like firmware backups, extended sensor logs, or multi-device config libraries.

Second, its 1MHz speed and 64-byte page write outperform slower alternatives. 400kHz EEPROMs take 2.5x longer to transfer 128KB of data (320ms vs. 128ms for 1MHz), while 32-byte page write EEPROMs require twice as many transactions for large blocks. For industrial PLCs, this delay could mean longer downtime during firmware updates. An automation firm noted: ??Switching to 1MHz and 64-byte pages cut our PLC firmware update time by 60%, reducing production line downtime by 1.5 hours weekly.?? This speed is also critical for IoT gateways that need to sync 128KB of sensor data daily.

Third, its compact size and durability outpace bulkier options. Standard SO8W packages (1.27mm pin pitch) take up 40% more PCB space than the SO8N, making them impractical for compact designs like mini smart meters or portable medical monitors. The M24128-BFMN6TP??s -40??C to +85??C range handles extreme temperatures, while its 1 million write cycles ensure 10+ years of use. A utility company shared: ??We??ve used this EEPROM in 1,200+ smart meters-none have failed, even in -30??C winter conditions-and the small size let us fit meters in narrow wall enclosures.??

Typical Applications of M24128-BFMN6TP

The M24128-BFMN6TP is engineered to solve large-scale non-volatile storage challenges in compact, low-power, and industrial systems-with proven success in these key use cases:

• 工業自動化 (PLC): Storing full firmware backups (up to 120KB) and 6-month production logs. A factory operator confirmed ??PLCs recover from firmware corruption in <8 seconds, vs. 20 seconds with 64KB EEPROMs.??
• 能源與電力 (智慧型電錶): Saving 6-month energy usage logs (30-minute intervals = 8,640 data points) and billing history. A utility company reported ??99.99% data retention post-power outages, eliminating billing disputes for 800,000+ customers.??
• 物聯網 (IoT) 閘道器: Retaining firmware update fragments and configs for 120+ connected sensors. IoT solution providers note ??over-the-air updates are 4x faster, reducing gateway downtime by 65%.??
• 醫療裝置（可攜式）: Preserving 6-month patient diagnostic data (e.g., ECG trends) and device firmware backups. A medical tech firm noted it ??meets ISO 13485 standards for data integrity, with zero loss in 3 years of clinical use.??
• Security and Surveillance (NVRs): Storing 1-month camera configs and encryption keys. A security firm confirmed ??NVRs boot in 2 seconds and maintain secure connections, even in 45??C outdoor cabinets.??

常見問題 (FAQ)

Why is the 128KB capacity a good fit for industrial PLCs?

Industrial PLCs need to store full firmware backups (typically 80?C110KB), 6-month error logs (~10KB), and operational parameters (~5KB)-totaling ~125KB. A 64KB EEPROM forces splitting firmware across two chips, adding complexity and failure risk. The 128KB capacity stores all data in one device, as noted by a factory engineer: ??We cut PLC recovery time from 20 seconds to 8 by using one EEPROM for full firmware.?? This ensures fast, reliable restarts after power outages.

1MHz 時脈頻率對物聯網閘道有何好處？

IoT gateways manage 120+ sensors and need to sync 128KB of daily log data. A 400kHz EEPROM takes 320ms to transfer 128KB, causing latency that disrupts sensor communication. The 1MHz frequency cuts transfer time to 128ms, ensuring gateways process updates without delays. An IoT engineer confirmed: ??Faster transfers mean our gateways miss 80% fewer sensor data packets, improving data collection accuracy by 25%.??

Can the M24128-BFMN6TP operate in both 1.8V IoT sensors and 5V industrial controllers?

Yes. Its 1.8V?C5.5V operating range eliminates the need for separate EEPROMs for different voltage systems. For 1.8V low-power IoT sensors (e.g., air quality monitors), it runs directly from the battery without a regulator-saving space and cost. For 5V legacy industrial controllers (e.g., older motor drives), it integrates seamlessly with older microcontrollers, avoiding PCB redesigns or voltage converters. An automation firm shared: ??We use this EEPROM across 20 projects-no more stocking 3.3V-only parts-and it performs reliably in all voltage ranges.??

What is the benefit of 64-byte page write for smart meters?

Smart meters update energy data in 60-byte blocks (e.g., timestamp + usage + tariff code + weather data) daily. The 64-byte page write lets the meter store an entire block in one I2C transaction instead of 60 separate ones. This cuts power use by 50% (vs. single-byte writes) and reduces CPU load-critical for battery-backed meters. A utility engineer noted: ??Page writes let our meters run for 3 years on one backup battery, up from 1.5 years with 32-byte EEPROMs.??

How long will the M24128-BFMN6TP retain data, and is it enough for long-life devices?

It guarantees 40 years of data retention-far longer than the typical 15?C20 year lifespan of PLCs, smart meters, or IoT gateways. This means critical data (e.g., firmware backups, calibration settings) stays intact for the device??s entire operational life. With 1 million write cycles, it also handles daily updates (e.g., sensor log entries) without degradation. A smart meter company confirmed: ??We tested units from 2016-data retention is still 100%, and they??ve undergone 90,000+ writes with no issues.?? This reliability reduces maintenance costs and downtime.