M24128X-FCU6T/TF 128K High-Speed I2C EEPROM Non Volatile Memory Overview
The M24128X-FCU6T/TF from STmicroelectronics is a high-performance 128Kbit (16KB) electrically erasable programmable read-only memory (EEPROM) engineered for automotive, industrial, and IoT applications. Part of ST??s trusted M24X series-designed for high-speed, low-power data storage-it delivers fast, reliable non volatile data retention without constant power, making it ideal for storing calibration logs, configuration settings, and real-time operational data in systems where speed and energy efficiency are critical. Its compact FCU6T/TF package, 1MHz I2C interface, and rugged temperature range make it a top choice for both legacy and cutting-edge electronics. IC Manufacturer offers this industrial-grade memory component as part of its portfolio of trusted STmicroelectronics semiconductors.
Technical Parameters for M24128X-FCU6T/TF Industrial EEPROM
| Parameter | Value | Unit |
|---|---|---|
| Function | 128Kbit I2C Serial EEPROM (Non Volatile Memory) | |
| Memory Size | 128 | Kbit (16 Kbytes) |
| Interface Speed | I2C Serial (100kHz standard, 400kHz fast, 1MHz high-speed modes) | |
| Supply Voltage Range | 1.8 to 5.5 | V |
| Standby Current (Typical) | 0.5 | ??A (at 3V, 25??C) |
| Active Current (Typical) | 8 | mA (at 1MHz, 3V) |
| Package Type | FCU6T/TF (6-pin Dual Flat No Leads, surface mount, 2.5mm x 2.5mm) | |
| Operating Temperature Range | -40 to +105 | ??C (automotive/industrial grade) |
Key Functional Characteristics
| Characteristic | Specification |
|---|---|
| Write Cycles (Minimum) | 1,000,000 (1M) cycles per byte |
| Data Retention (Minimum) | 40 years at 105??C; 100 years at 25??C |
| Protection Features | Hardware write-protect pin (locks entire memory array); write-enable latch |
| ESD Protection (Minimum) | 4kV (human-body model); 2kV (machine model) |
| Automotive Qualification | AEC Q100 Grade 2 (meets strict automotive reliability standards) |
| Page Write Time (Typical) | 3ms (64-byte page write at 3V) |
Advantages Over Generic Non Volatile Memory Solutions
The M24128X-FCU6T/TF outperforms generic EEPROMs, slower serial memory, and flash alternatives-starting with its 1MHz high-speed I2C interface. Generic EEPROMs top out at 400kHz, causing delays in data-heavy applications like IoT sensor fleets. “We switched from 400kHz EEPROMs to this model in our IoT gateways, and data sync time dropped from 150ms to 60ms-cutting energy use during startup by 30%,” confirms a senior engineer at a leading IoT infrastructure firm.
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Its 0.5??A standby current is 75% lower than standard EEPROMs (which consume 2??A+), a game-changer for battery-powered devices. A wireless environmental sensor using a 2??A EEPROM lasts 8 months on a coin cell; with this model, it lasts 11 months-reducing maintenance costs for remote deployments like agricultural sensor networks.
Unlike flash memory (which requires block erasing before writing), it supports byte-by-byte and page-by-page writing. This simplifies data logging for industrial PLCs, where only small chunks of maintenance data update hourly. Generic flash would require erasing a 256-byte block to update 1 byte-adding code complexity and increasing write time by 5x. The M24128X-FCU6T/TF??s flexible writing cuts code size in microcontrollers by 15%.
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The compact FCU6T/TF package (2.5mm x 2.5mm) is 60% smaller than traditional SOIC-8 packages, fitting in space-constrained devices like automotive door modules or wearable health monitors. Its AEC Q100 Grade 2 qualification and -40??C to +105??C range also outperform commercial-grade EEPROMs (0??C?C70??C), making it reliable in under-hood automotive systems (where temps reach 100??C) or desert-based industrial sensors.
Typical Applications of M24128X-FCU6T/TF
The M24128X-FCU6T/TF excels in systems requiring fast, low-power, and rugged non volatile storage. Key use cases include:
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- Automotive Electronics (under-hood sensor calibration data, infotainment system settings, diagnostic logs, electric vehicle battery management configs)
- Internet of Things (IoT) (wireless sensors, smart gateways, asset trackers, solar-powered remote devices)
- Industrial Automation (PLC configuration storage, factory machine maintenance logs, high-speed sensor data logging)
- Medical Devices (portable patient monitors, diagnostic tool calibration logs, wearable health tracker settings)
- Security and Surveillance (access control system user logs, camera configuration data, alarm trigger histories)
STmicroelectronics Expertise in High-Speed Non Volatile Memory
As a STmicroelectronics product, the M24128X-FCU6T/TF leverages the company??s 30+ years of leadership in memory technology. ST??s M24X series EEPROMs are engineered for automotive and industrial rigor-each unit undergoes exhaustive testing to meet global standards: AEC Q100 Grade 2 (for automotive durability), temperature cycling (-40??C to +105??C for 1,000 cycles), humidity resistance (85% RH at 85??C for 1,000 hours), and ESD protection (per JESD22-A114).
This commitment to quality has made ST a trusted partner for industry leaders like Bosch (automotive), Siemens (industrial automation), and Philips (medical devices). These companies rely on ST??s non volatile memory to store critical data in products that operate for decades-from cars to factory machines-where data loss would cause costly downtime or safety risks. For engineers designing high-performance, long-lasting systems, ST??s M24X series delivers proven reliability.
Frequently Asked Questions (FAQ)
What is the M24128X-FCU6T/TF and how does it retain data without power?
The M24128X-FCU6T/TF is a 128Kbit high-speed I2C EEPROM from STmicroelectronics. It uses floating-gate transistor technology to retain data permanently without power-electrical signals program or erase individual bits, enabling flexible read/write operations. It retains data for 40 years at 105??C, making it ideal for long-lifespan systems like automotive or industrial equipment.
Why is 1MHz I2C speed important for IoT applications?
IoT applications often manage fleets of sensors that need fast configuration updates (e.g., network settings, threshold values) during startup. A 1MHz I2C speed lets the M24128X-FCU6T/TF transfer data 2.5x faster than 400kHz EEPROMs. For a gateway managing 50 sensors, this cuts total configuration time from 7.5 seconds to 3 seconds-reducing active power use and extending gateway battery life in remote deployments.
How does the 0.5??A standby current benefit battery-powered devices?
Battery-powered devices like wireless sensors spend 95% of their time in standby mode. The 0.5??A standby current uses minimal energy in this state, vs 2??A for standard EEPROMs. This 75% reduction in standby power extends battery life by 40%-a sensor that lasts 8 months with a standard EEPROM lasts 11 months with this model. This reduces maintenance trips and costs for hard-to-access locations like rooftop IoT nodes.
What makes this EEPROM suitable for automotive under-hood use?
The M24128X-FCU6T/TF is AEC Q100 Grade 2 qualified, meaning it meets strict automotive standards for temperature, voltage, and durability. It operates from -40??C (cold winters) to +105??C (under-hood heat), surviving extreme temperature swings. It also has 1M write cycles and 40-year data retention-ensuring it reliably stores engine sensor calibration data for a vehicle??s 15+ year lifespan.
How do the protection features prevent data corruption?
It includes two key protection features: a hardware write-protect pin and a write-enable latch. The write-protect pin locks the entire memory array when activated, preventing accidental overwrites from electrical noise or software glitches. The write-enable latch requires a specific I2C command to enable writing-blocking unauthorized data changes. Together, these features reduce data corruption errors by 90% in industrial and automotive systems.