The RAK15006 WisBlock FRAM NVRAM Module expands WisBlock systems with high-capacity non-volatile storage using the Fujitsu MB85RS4MT FRAM chip.
 
With 512 kB capacity, 10-trillion write cycles, and 10-year data retention, it provides the perfect solution for applications requiring frequent data updates without wear limits typical of EEPROM or Flash.
 
The module features a 40 MHz SPI interface, fast read/write access, and a low standby current of 50 µA, making it ideal for industrial, environmental and battery-powered IoT devices.
 
Compact and reliable, the RAK15006 delivers durable data storage for sensor logs, configuration parameters, and secure event records in WisBlock-based systems.
 
Key Features
 
512 kB non-volatile FRAM storage (Fujitsu MB85RS4MT)
Unlimited-feel write endurance – up to 10 trillion cycles per byte
Retains data for 10 years @ 85 °C (95 years @ 55 °C)
SPI digital interface supporting up to 40 MHz transfer speed
Ultra-fast read/write with no erase delay
Low standby current (≈ 50 µA) and 2.6 mA typical @ 40 MHz
Compact 10 × 10 mm module for embedded designs
Industrial temperature range –40 °C to +85 °C
Fully compatible with WisBlock Base Boards and Core modules
 
Ideal For
 
Data logging and sensor storage with frequent writes
Secure configuration and parameter retention
Industrial and environmental monitoring systems
Battery-powered IoT devices requiring non-volatile backup
Edge computing and control systems with reliable memory needs