| PartNumber | FM31278-G | FM31276-G | FM31276-GTR |
| Description | Supervisory Circuits 256K w/RTC Pwr Mon WDT Bat Sw PF | Supervisory Circuits 64K w/RTC Pwr Mon WDT Bat Sw PF | Supervisory Circuits 64K w/RTC Pwr Mon WDT Bat Sw PF |
| Manufacturer | Cypress Semiconductor | Cypress Semiconductor | Cypress Semiconductor |
| Product Category | Supervisory Circuits | Supervisory Circuits | Supervisory Circuits |
| RoHS | Y | Y | Y |
| Type | Voltage Supervisory | Voltage Supervisory | Voltage Supervisory |
| Mounting Style | SMD/SMT | SMD/SMT | SMD/SMT |
| Package / Case | SOIC-14 | SOIC-14 | SOIC-14 |
| Threshold Voltage | 3.9 V, 4.4 V | 3.9 V, 4.4 V | - |
| Number of Inputs Monitored | 2 Input | 2 Input | - |
| Output Type | Active Low, Bidirectional | Active Low, Bidirectional | - |
| Manual Reset | Manual Reset | Manual Reset | - |
| Watchdog Timers | Watchdog | Watchdog | - |
| Battery Backup Switching | Backup | Backup | - |
| Reset Delay Time | 200 ms | 200 ms | - |
| Supply Voltage Max | 5.5 V | 5.5 V | - |
| Minimum Operating Temperature | - 40 C | - 40 C | - |
| Maximum Operating Temperature | + 85 C | + 85 C | - |
| Series | FM31278 | FM31276 | FM31276 |
| Packaging | Tube | Tube | Reel |
| Brand | Cypress Semiconductor | Cypress Semiconductor | Cypress Semiconductor |
| Overvoltage Threshold | 4.4 V | 4.4 V | - |
| Undervoltage Threshold | 3.9 V | 3.9 V | - |
| Moisture Sensitive | Yes | Yes | Yes |
| Operating Supply Current | 1500 uA | 1500 uA | - |
| Power Fail Detection | Yes | Yes | - |
| Product Type | Supervisory Circuits | Supervisory Circuits | Supervisory Circuits |
| Factory Pack Quantity | 112 | 112 | 2500 |
| Subcategory | PMIC - Power Management ICs | PMIC - Power Management ICs | PMIC - Power Management ICs |
| Supply Voltage Min | 4 V | 4 V | - |
| Unit Weight | 0.011923 oz | 0.011923 oz | 0.011923 oz |