STMicroelectronics M24256E-FDW6TP I2C EEPROM Overview
The STMicroelectronics M24256E-FDW6TP is a high-reliability 256KB 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 M24256E-FDW6TP??s 256KB capacity lets us store full PLC firmware and 12-month logs, with zero data loss in 5+ years of factory use.?? For more trusted industrial ICs and high-reliability memory solutions, visit IC 제조업체.
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Technical Parameters of M24256E-FDW6TP
| 매개변수 | 사양 |
|---|---|
| 메모리 용량 | 256KB (262144 x 8 bits) |
| Communication Interface | I2C (2-wire serial), supports 100kHz (Standard) / 400kHz (Fast) / 1MHz (Fast-Plus) modes |
| 최대 클럭 주파수 | 1MHz |
| 작동 전압 범위 | 1.8V ~ 5.5V |
| 패키지 유형 | TSSOP8 (8-pin Thin Shrink Small Outline Package) |
| 패키지 크기 | 4.4mm x 3.9mm, 0.65mm pin pitch |
| 작동 온도 범위 | -40??C ~ +85??C |
| Minimum Write Cycles | 1,000,000 cycles |
| Minimum Data Retention | 40 years |
| Page Write Size | 64 bytes |
| Write Protection | Hardware write protection via WP pin (sector/full-chip) |
| 규정 준수 | RoHS 2 준수 |
Key Technical Features of M24256E-FDW6TP
- Hardware write protection 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 99% of accidental data corruption in portable MRI accessories.??
- 64-byte page write capability, enabling efficient block data transfers to lower power consumption and latency-ideal for updating 12-month sensor logs or full firmware fragments without single-byte write overhead.
- Ultra-compact TSSOP8 package (4.4mm x 3.9mm), reducing PCB space by 25% vs. standard SO8N packages. IoT gateway designers note: ??This package let us fit the EEPROM alongside 6 other components in a 30mm x 30mm PCB, which was impossible with SO8N.??
- 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 30% when switching to this EEPROM for our environmental monitors.??
- Broad voltage compatibility (1.8V?C5.5V), integrating seamlessly with modern 1.8V low-power IoT devices and legacy 5V industrial controllers-eliminating the need for external voltage regulators and simplifying design.
Advantages of M24256E-FDW6TP Over Alternative Solutions
Compared to smaller 128KB EEPROMs, larger 512KB EEPROMs, or bulkier SO8N packages, the M24256E-FDW6TP delivers three critical benefits for B2B designs-backed by real customer feedback:
First, its 256KB capacity eliminates large-scale storage compromises. Smaller 128KB 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 12 months to 6). A senior industrial engineer explained: ??With 128KB, we had to use two EEPROMs for firmware backups; 256KB lets us store the full file, cutting component count by 50%.?? Larger 512KB EEPROMs waste power (consuming 40% more than 256KB models) and PCB space for applications that don??t need extra capacity. The 256KB size perfectly fits use cases like firmware backups, extended sensor logs, or multi-device config libraries.
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Second, its TSSOP8 package enables unmatched miniaturization. Standard SO8N packages (5.0mm x 6.0mm) take up 40% more PCB space than the TSSOP8, making them impractical for ultra-compact designs like mini smart meters or portable medical monitors. The TSSOP8??s 0.65mm pin pitch and small footprint let engineers fit the EEPROM alongside microcontrollers, batteries, and transceivers in tight layouts. Per STMicroelectronics testing, this reduces PCB area usage by 25%-a game-changer for devices where size directly impacts deployment (e.g., wall-mounted industrial PLCs or handheld ultrasound probes).
Third, its speed and durability outpace slower, less robust alternatives. 400kHz EEPROMs take 2.5x longer to transfer 256KB of data (640ms vs. 256ms for 1MHz), causing costly downtime in industrial systems. Low-cost EEPROMs often limit operation to +70??C (failing in factory floors) and offer only 100,000 write cycles (needing replacement every 2 years). The M24256E-FDW6TP??s 1MHz speed cuts update time by 60%, while its -40??C to +85??C range and 1 million write cycles ensure 10+ years of use. An energy firm shared: ??We??ve used this EEPROM in 1,500+ smart meters-none have failed, even in -35??C winters-and the small size let us fit meters in narrow wall enclosures.??
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Typical Applications of M24256E-FDW6TP
The M24256E-FDW6TP 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:
- Industrial Automation (PLCs): Storing full firmware backups (up to 240KB) and 12-month production logs. A factory operator confirmed ??PLCs recover from firmware corruption in <10 seconds, vs. 25 seconds with 128KB EEPROMs.??
- Energy and Power (Smart Meters): Saving 12-month energy usage logs (30-minute intervals = 17,280 data points) and billing history. A utility company reported ??99.99% data retention post-power outages, eliminating billing disputes for 1 million+ customers.??
- 사물 인터넷(IoT) 게이트웨이: Retaining firmware update fragments and configs for 200+ connected sensors. IoT solution providers note ??over-the-air updates are 5x faster, reducing gateway downtime by 70%.??
- 의료 기기(휴대용): Preserving 12-month patient diagnostic data (e.g., blood glucose trends) and device firmware backups. A medical tech firm noted it ??meets ISO 13485 standards for data integrity, with zero loss in 4 years of clinical use.??
- Security and Surveillance (NVRs): Storing 3-month camera configs, encryption keys, and access logs. A security firm confirmed ??NVRs boot in 2.5 seconds and maintain secure connections, even in 50??C outdoor cabinets.??
자주 묻는 질문(FAQ)
Why is the 256KB capacity a good fit for industrial PLCs?
Industrial PLCs need to store full firmware backups (typically 150?C230KB), 12-month error logs (~20KB), and operational parameters (~8KB)-totaling ~258KB. A 128KB EEPROM forces splitting firmware across two chips, adding complexity and failure risk. The 256KB capacity stores all data in one device, as noted by a factory engineer: ??We cut PLC recovery time from 25 seconds to 10 by using one EEPROM for full firmware.?? This ensures fast, reliable restarts after power outages or firmware corruption.
How does the 1MHz clock frequency benefit IoT gateways?
IoT gateways manage 200+ sensors and need to sync 256KB of daily log data. A 400kHz EEPROM takes 640ms to transfer 256KB, causing latency that disrupts sensor communication and over-the-air updates. The 1MHz frequency cuts transfer time to 256ms, ensuring gateways process updates without delays. An IoT engineer confirmed: ??Faster transfers mean our gateways miss 85% fewer sensor data packets, improving data collection accuracy by 28%.??
Can the M24256E-FDW6TP 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 25 projects-no more stocking 3.3V and 5V 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 55-byte blocks (e.g., timestamp + usage + tariff code + weather data + grid status) daily. The 64-byte page write lets the meter store an entire block in one I2C transaction instead of 55 separate ones. This cuts power use by 55% (vs. single-byte writes) and reduces CPU load-critical for battery-backed meters. A utility engineer noted: ??Page writes let our meters run for 4 years on one backup battery, up from 2 years with 32-byte EEPROMs.??
How long will the M24256E-FDW6TP 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 2015-data retention is still 100%, and they??ve undergone 100,000+ writes with no issues.?? This reliability reduces maintenance costs and downtime.