| Name | Automotive Qualified | Battery Switch Over (y/n) | Density (Kb) | Early Power Fail (y/n) | Event Detect (y/n) | Interface | Max. Operating Temp. (°C) | Max. Operating VCCQ (V) | Max. Operating Voltage (V) | Min. Operating Temp. (°C) | Min. Operating VCCQ (V) | Min. Operating Voltage (V) | Package | Power Monitor (y/n) | RTC Alarm (y/n) | RTC (y/n) | Serial Number (y/n) | Watch Dog (y/n) |
| FM31278-G | N | Y | 256 | Y | COUNT | I2C | 85 | 5.5 | 5.5 | -40 | 4 | 4 | SOIC | Y | N | Y | Y | Y |
| FM3164-G | N | Y | 64 | Y | COUNT | I2C | 85 | 5.5 | 5.5 | -40 | 2.7 | 2.7 | SOIC | Y | N | Y | Y | Y |
| FM31276-G | N | Y | 64 | Y | COUNT | I2C | 85 | 5.5 | 5.5 | -40 | 4 | 4 | SOIC | Y | N | Y | Y | Y |
| FM31278-GTR | N | Y | 256 | Y | COUNT | I2C | 85 | 5.5 | 5.5 | -40 | 4 | 4 | SOIC | Y | N | Y | Y | Y |
| FM31L278-GTR | N | Y | 256 | Y | COUNT | I2C | 85 | 3.6 | 3.6 | -40 | 2.7 | 2.7 | SOIC | Y | N | Y | Y | Y |
| FM31L278-G | N | Y | 256 | Y | COUNT | I2C | 85 | 3.6 | 3.6 | -40 | 2.7 | 2.7 | SOIC | Y | N | Y | Y | Y |
| FM33256B-GTR | N | Y | 256 | Y | COUNT | SPI | 85 | 3.6 | -40 | 2.7 | SOIC | Y | Y | Y | Y | Y | ||
| FM3164-GTR | N | Y | 64 | Y | COUNT | I2C | 85 | 5.5 | 5.5 | -40 | 2.7 | 2.7 | SOIC | Y | N | Y | Y | Y |
| FM31L276-G | N | Y | 64 | Y | COUNT | I2C | 85 | 3.6 | 3.6 | -40 | 2.7 | 2.7 | SOIC | Y | N | Y | Y | Y |
| FM33256B-G | N | Y | 256 | Y | COUNT | SPI | 85 | 3.6 | -40 | 2.7 | SOIC | Y | Y | Y | Y | Y | ||
| FM31276-GTR | N | Y | 64 | Y | COUNT | I2C | 85 | 5.5 | 5.5 | -40 | 4 | 4 | SOIC | Y | N | Y | Y | Y |
| FM31L276-GTR | N | Y | 64 | Y | COUNT | I2C | 85 | 3.6 | 3.6 | -40 | 2.7 | 2.7 | SOIC | Y | N | Y | Y | Y |
| FM31256-GTR | N | Y | 256 | Y | COUNT | I2C | 85 | 5.5 | 5.5 | -40 | 2.7 | 2.7 | SOIC | Y | N | Y | Y | Y |
| FM31256-G | N | Y | 256 | Y | COUNT | I2C | 85 | 5.5 | 5.5 | -40 | 2.7 | 2.7 | SOIC | Y | N | Y | Y | Y |
