Overview
The FM25W256-GTR is a high-speed 256 Kbit F-RAM (Ferroelectric Random Access Memory) designed by Infineon Technologies. This nonvolatile memory is ideal for reliable data retention and high-performance applications, outperforming traditional serial flash and EEPROM. It offers 151-year data retention, rapid bus-speed write operations, and substantial write endurance, making it suitable for critical industrial applications. The device operates across a wide industrial temperature range from -40 °C to +85 °C and supports up to 100 trillion (10^14) read/write cycles, which is 100 million times more than EEPROM.
Key Specifications
| Specification | Value |
|---|---|
| Memory Size | 256 Kbit (32K × 8) |
| Interface | High-speed SPI (Serial Peripheral Interface) |
| Clock Frequency | Up to 20 MHz |
| Operating Voltage | 2.7 V to 5.5 V |
| Operating Temperature | -40 °C to +85 °C |
| Package Type | 8-pin SOIC (Small Outline Integrated Circuit) |
| Write Endurance | 100 trillion (10^14) read/write cycles |
| Data Retention | 151 years |
| Active Current | 250 μA at 1 MHz |
| Standby Current | 15 μA (typical) |
| RoHS Compliance | Yes |
Key Features
- High-endurance with 100 trillion (10^14) read/write cycles
- 151-year data retention
- NoDelay™ writes, allowing data to be written at bus speed without delays
- Advanced high-reliability ferroelectric process
- Very fast serial peripheral interface (SPI) with up to 20 MHz frequency
- Sophisticated write protection scheme including hardware and software protection
- Low power consumption with 250 μA active current at 1 MHz and 15 μA standby current
- Wide voltage operation: VDD = 2.7 V to 5.5 V
- Industrial temperature range: –40°C to +85°C
- Restriction of hazardous substances (RoHS) compliant
Applications
The FM25W256-GTR is ideal for various industrial and critical data logging applications, including:
- Critical data collection where the number of write cycles may be critical
- Demanding industrial controls where long write times of serial flash or EEPROM can cause data loss
- High-performance programmable logic controllers (PLC) requiring high reliability and throughput
- Life-enhancing patient monitoring devices
- IoT sensor, portable medical, wearable, and automotive applications
Q & A
- What is the memory size of the FM25W256-GTR?
The FM25W256-GTR has a memory size of 256 Kbit, logically organized as 32K × 8.
- What is the operating temperature range of the FM25W256-GTR?
The device operates across an industrial temperature range from -40 °C to +85 °C.
- What is the clock frequency of the FM25W256-GTR?
The FM25W256-GTR supports a clock frequency of up to 20 MHz.
- How many read/write cycles can the FM25W256-GTR support?
The device can support 100 trillion (10^14) read/write cycles.
- What is the data retention period of the FM25W256-GTR?
The FM25W256-GTR provides reliable data retention for 151 years.
- Does the FM25W256-GTR support write protection?
Yes, the FM25W256-GTR features a sophisticated write protection scheme including hardware and software protection.
- Is the FM25W256-GTR RoHS compliant?
Yes, the FM25W256-GTR is Restriction of Hazardous Substances (RoHS) compliant.
- What is the typical standby current of the FM25W256-GTR?
The typical standby current of the FM25W256-GTR is 15 μA.
- Can the FM25W256-GTR replace serial flash or EEPROM?
Yes, the FM25W256-GTR can serve as a hardware drop-in replacement for serial flash and EEPROM due to its compatible SPI interface and high-speed write capabilities.
- What are the key benefits of using F-RAM technology in the FM25W256-GTR?
The key benefits include no delay writes, high write endurance, low power consumption, and reliable data retention over a wide temperature range.
