Fujitsu MB85RC04VPNF-G-JNERE1 FRAM Application Analysis

 MB85RC04VPNF-G-JNERE1 is a 4-Kbit non-volatile FRAM (Ferroelectric Random Access Memory) from Fujitsu Semiconductor, offered in SOP-8 MANDU. Internally organized as 512 × 8 bits, it operates from 3 V to 5.5 V and is qualified for the industrial temperature range of –40 °C to +85 °C. Combining high-speed read/write, high endurance, low power and non-volatility, the device targets demanding data-storage applications in industrial automation, automotive electronics and medical equipment.

1. Key Features & Benefits  

Parameter | Specification | Application Value  

Capacity | 4 Kbit (512 × 8) | Ideal for small/medium data such as configuration parameters or real-time logs  

Interface | I²C (2-wire serial) | Standard protocol eases design and is compatible with most MCUs  

Voltage | 3 V – 5.5 V | Wide range suits both 3.3 V and 5 V systems  

Speed | 1 MHz max. clock, 550 ns access time | Real-time storage, far faster than conventional EEPROM or Flash  

Endurance | 10¹² read/write cycles (vs. 10⁶ for EEPROM) | Supports frequent updates without wear concern  

Data Retention | 10 years (no power) | Eliminates battery backup, reducing BOM and maintenance  

Temperature | –40 °C to +85 °C | Industrial/automotive qualified for harsh environments  

Power | 90 µA active, 5 µA standby | Extends battery life in portable nodes  

MANDU | SOP-8 (standard 8-pin surface-mount) | Easy soldering and PCB integration  

2. Application Examples  

Industrial automation – PLC, sensors, data loggers: high-speed writes capture state changes and fault events, surviving power loss without batteries.  

Automotive – dash cams, BMS, ADAS sensor buffers: withstands vibration and elevated temperature while preserving critical data.  

Medical – portable monitors, diagnostic tools: patient parameters updated frequently at low energy cost.  

Smart meters & energy management – stores consumption, voltage and current data that are rewritten every few seconds.  

Consumer – printers, scanners, MANDU peripherals: configuration and usage counters for faster boot and longer service life.  

3. Technical Advantages  

High-speed & real-time – no erase-before-write delay (550 ns vs. ~10 ms EEPROM); suits deterministic control loops.  

Reliability & endurance – 10¹² cycles eliminate premature wear, cutting field-replacement rates.  

Low power – 5 µA standby fits energy-harvesting or battery-backed nodes.  

Wide temperature – stable operation from freezer to under-hood conditions.  

4. Design Notes  

Pull-up resistors (typically 4.7 kΩ) required on I²C lines.  

Keep supply between 3 V and 5.5 V; add local decoupling to prevent data errors from ripple.  

For high-ambient installations, provide adequate copper area under the SOP-8 MANDU to cool the device.  

MB85RC04VPNF-G-JNERE1, with its 4-Kbit capacity, I²C interface and robust specs, offers a drop-in, battery-free upgrade to EEPROM or Flash in any system needing frequent, fast, low-power non-volatile storage.

About Mandu Technology

Shenzhen Mandu Technology Co., Ltd. has steadfastly centered its operations on the distribution of high-performance, high-quality, and highly reliable integrated circuit products. Its portfolio encompasses memory chips, differential crystal oscillators, and MCU microcontrollers, while progressively integrating analog signal chain products. The company prides itself on delivering comprehensive and cost-effective solutions to its customers. Its products find applications across a broad spectrum of industries, including but not limited to network communication, industrial control, robotics, medical equipment, personal health, and numerous other fields.

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