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| PartNumber | CAT1021WI-42-GT3 | CAT1021WI-42-G | CAT1021WI-45 |
| Description | Supervisory Circuits CPU w/2K | Supervisory Circuits CPU w/2K | Volt Supervisor Monitor 3V/3.3V/5V 8-Pin SOIC N - Bulk (Alt: CAT1021WI-45) |
| Manufacturer | ON Semiconductor | ON Semiconductor | - |
| Product Category | Supervisory Circuits | PMIC - Supervisors | - |
| RoHS | Y | - | - |
| Type | Voltage Supervisory | Simple Reset/Power-On Reset | - |
| Mounting Style | SMD/SMT | SMD/SMT | - |
| Package / Case | SOIC-8 Wide | - | - |
| Threshold Voltage | 4.2 V | 3 V 3.3 V 5 V | - |
| Number of Inputs Monitored | 1 Input | 1 Input | - |
| Manual Reset | Manual Reset | Manual Reset | - |
| Watchdog Timers | Watchdog | Watchdog | - |
| Supply Voltage Max | 5.5 V | - | - |
| Minimum Operating Temperature | - 40 C | - 40 C | - |
| Maximum Operating Temperature | + 85 C | + 85 C | - |
| Series | CAT1021 | CAT1021 | - |
| Packaging | Reel | Tape & Reel (TR) | - |
| Height | 1.5 mm | - | - |
| Length | 5 mm | - | - |
| Width | 4 mm | - | - |
| Brand | ON Semiconductor | - | - |
| Overvoltage Threshold | 4.5 V | 4.5 V | - |
| Undervoltage Threshold | 4.25 V | 4.25 V | - |
| Operating Supply Current | 3 mA | 3000 uA | - |
| Pd Power Dissipation | 1000 mW | - | - |
| Product Type | Supervisory Circuits | - | - |
| Factory Pack Quantity | 3000 | - | - |
| Subcategory | PMIC - Power Management ICs | - | - |
| Supply Voltage Min | 2.7 V | - | - |
| Package Case | - | SOIC-8 Wide | - |
| Operating Temperature | - | -40°C ~ 85°C (TA) | - |
| Mounting Type | - | Surface Mount | - |
| Supplier Device Package | - | 8-SOIC | - |
| Output | - | Open Drain or Open Collector | - |
| Reset | - | Active High/Active Low | - |
| Number of Voltages Monitored | - | 1 | - |
| Reset Timeout | - | 130 ms Minimum | - |
| Voltage Threshold | - | 4.25V | - |
| Pd Power Dissipation | - | 1000 mW | - |
| Supply Voltage Max | - | 5.5 V | - |
| Supply Voltage Min | - | 2.7 V | - |