| PartNumber | DS1231-20+ | DS1231-20N | DS1231-20/G |
| Description | Supervisory Circuits Power Monitor | Supervisory Circuits Power Monitor | Supervisory Circuits Power Monitor |
| Manufacturer | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Product Category | Supervisory Circuits | Supervisory Circuits | Supervisory Circuits |
| RoHS | Y | N | N |
| Type | Voltage Supervisory | Voltage Supervisory | Voltage Supervisory |
| Mounting Style | Through Hole | - | - |
| Package / Case | PDIP-8 | PDIP-Narrow-8 | PDIP-Narrow-8 |
| Threshold Voltage | 3.3 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V |
| Number of Inputs Monitored | 1 Input | 1 Input | 1 Input |
| Output Type | Active Low, Open Drain | Active High, Active Low, Open Drain | Active High, Active Low, Open Drain |
| Manual Reset | Manual Reset | No Manual Reset | No Manual Reset |
| Watchdog Timers | No Watchdog | No Watchdog | No Watchdog |
| Battery Backup Switching | No Backup | No Backup | No Backup |
| Reset Delay Time | 500 ms | - | - |
| Supply Voltage Max | 5.5 V | 5.5 V | 5.5 V |
| Minimum Operating Temperature | 0 C | - 40 C | 0 C |
| Maximum Operating Temperature | + 70 C | + 85 C | + 70 C |
| Series | DS1231 | DS1231 | DS1231 |
| Packaging | Bulk | Tube | Tube |
| Height | 4.45 mm (Max) | 4.45 mm (Max) | 4.45 mm (Max) |
| Length | 9.91 mm (Max) | 9.91 mm (Max) | 9.91 mm (Max) |
| Width | 7.87 mm (Max) | 7.87 mm (Max) | 7.87 mm (Max) |
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Overvoltage Threshold | 5.5 V | 4.74 V | 4.74 V |
| Undervoltage Threshold | 3.3 V | 4.5 V | 4.5 V |
| Chip Enable Signals | No Chip Enable | No Chip Enable | No Chip Enable |
| Operating Supply Current | 0.5 mA | 2 mA | 2 mA |
| Operating Supply Voltage | 5 V | 5 V | 5 V |
| Power Fail Detection | Yes | Yes | Yes |
| Product Type | Supervisory Circuits | Supervisory Circuits | Supervisory Circuits |
| Factory Pack Quantity | 50 | 50 | 1 |
| Subcategory | PMIC - Power Management ICs | PMIC - Power Management ICs | PMIC - Power Management ICs |
| Supply Voltage Min | 4.5 V | 4.5 V | 4.5 V |
| Part # Aliases | 90-12310+200 DS1231 | 90-1231I-200 DS1231 | 90-1231G-200 DS1231 |
| Unit Weight | 0.032805 oz | - | - |