| PartNumber | MAX6423US21-T | MAX6423US21+T | MAX6423US20+T |
| Description | Supervisory Circuits Low-Power, SC70/SOT Microprocessor Reset Circuits w. Capacitor-Adjustable Rset Timeout Del | Supervisory Circuits Single uPower Reset Circuit | Supervisory Circuits Single uPower Reset Circuit |
| Manufacturer | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Product Category | Supervisory Circuits | PMIC - Supervisors | PMIC - Supervisors |
| Type | Voltage Supervisory | Simple Reset/Power-On Reset | Simple Reset/Power-On Reset |
| Mounting Style | SMD/SMT | SMD/SMT | SMD/SMT |
| Package / Case | SOT-143-4 | - | - |
| Threshold Voltage | 1.6 V to 5 V | 1.6 V to 5 V | 1.6 V to 5 V |
| Number of Inputs Monitored | 1 Input | 1 Input | 1 Input |
| Output Type | Active Low, Open Drain | Active Low Open Drain | Active Low Open Drain |
| Manual Reset | No 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 | 4.375 ms | 4.375 ms | 4.375 ms |
| Supply Voltage Max | 5.5 V | - | - |
| Minimum Operating Temperature | - 40 C | - 40 C | - 40 C |
| Maximum Operating Temperature | + 125 C | + 125 C | + 125 C |
| Series | MAX6423US | MAX6423US | MAX6423US |
| Packaging | Reel | Tape & Reel (TR) | Tape & Reel (TR) |
| Height | 0.94 mm | - | - |
| Length | 2.92 mm | - | - |
| Width | 1.3 mm | - | - |
| Brand | Maxim Integrated | - | - |
| Overvoltage Threshold | 2.153 V | 2.153 V | 2.05 V |
| Undervoltage Threshold | 2.048 V | 2.048 V | 1.95 V |
| Chip Enable Signals | No Chip Enable | No Chip Enable | No Chip Enable |
| Operating Supply Current | 2.5 uA | 2.5 uA | 2.5 uA |
| Pd Power Dissipation | 320 mW | - | - |
| Power Fail Detection | No | No | No |
| Product Type | Supervisory Circuits | - | - |
| Subcategory | PMIC - Power Management ICs | - | - |
| Supply Voltage Min | 1 V | - | - |
| Part # Aliases | MAX6423US | MAX6423US | MAX6423US |
| Package Case | - | SOT-143-4 | SOT-143-4 |
| Operating Temperature | - | -40°C ~ 125°C (TA) | -40°C ~ 125°C (TA) |
| Mounting Type | - | Surface Mount | Surface Mount |
| Supplier Device Package | - | SOT-143-4 | SOT-143-4 |
| Output | - | Open Drain or Open Collector | Open Drain or Open Collector |
| Reset | - | Active Low | Active Low |
| Number of Voltages Monitored | - | 1 | 1 |
| Reset Timeout | - | Adjustable/Selectable | Adjustable/Selectable |
| Voltage Threshold | - | 2.1V | 2V |
| Pd Power Dissipation | - | 320 mW | 320 mW |
| Supply Voltage Max | - | 5.5 V | 5.5 V |
| Supply Voltage Min | - | 1 V | 1 V |