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| PartNumber | CAT1021WI-30-GT3 | CAT1021WI-25-GT3 | CAT1021WI-28-GT3 |
| Description | Supervisory Circuits CPU w/2K | Supervisory Circuits CPU w/2K | Supervisory Circuits CPU w/2K |
| Manufacturer | ON Semiconductor | ON Semiconductor | ON 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-8 Wide | SOIC-8 Wide | SOIC-8 Wide |
| Threshold Voltage | 3 V | 2.5 V | 2.8 V |
| Number of Inputs Monitored | 1 Input | 1 Input | 1 Input |
| Manual Reset | Manual Reset | Manual Reset | Manual Reset |
| Watchdog Timers | Watchdog | Watchdog | Watchdog |
| Supply Voltage Max | 5.5 V | 5.5 V | 5.5 V |
| Minimum Operating Temperature | - 40 C | - 40 C | - 40 C |
| Maximum Operating Temperature | + 85 C | + 85 C | + 85 C |
| Series | CAT1021 | CAT1021 | CAT1021 |
| Packaging | Reel | Reel | Reel |
| Height | 1.5 mm | 1.5 mm | 1.5 mm |
| Length | 5 mm | 5 mm | 5 mm |
| Width | 4 mm | 4 mm | 4 mm |
| Brand | ON Semiconductor | ON Semiconductor | ON Semiconductor |
| Overvoltage Threshold | 3.15 V | 2.7 V | 3 V |
| Undervoltage Threshold | 3 V | 2.55 V | 2.85 V |
| Operating Supply Current | 3 mA | 3 mA | 3 mA |
| Pd Power Dissipation | 1000 mW | 1000 mW | 1000 mW |
| Product Type | Supervisory Circuits | Supervisory Circuits | Supervisory Circuits |
| Factory Pack Quantity | 3000 | 3000 | 3000 |
| Subcategory | PMIC - Power Management ICs | PMIC - Power Management ICs | PMIC - Power Management ICs |
| Supply Voltage Min | 2.7 V | 2.7 V | 2.7 V |
| Unit Weight | 0.002732 oz | - | - |