| PartNumber | 74F521PC | 74F521SJ | 74F521MSA |
| Description | Logic Comparators 8-Bit Identity Comp | Logic Comparators 8-Bit Identity Comp | Logic Comparators 8-Bit Identity Comp |
| Manufacturer | ON Semiconductor | ON Semiconductor | ON Semiconductor |
| Product Category | Logic Comparators | Logic Comparators | Logic Comparators |
| RoHS | Y | Y | Y |
| Comparator Type | Identity | Identity | Identity |
| Number of Bits | 8 bit | 8 bit | 8 bit |
| Logic Function | A = B | - | A = B |
| Output Type | Active Low | - | Active Low |
| Supply Voltage Max | 5.5 V | 5.5 V | 5.5 V |
| Supply Voltage Min | 4.5 V | 4.5 V | 4.5 V |
| Minimum Operating Temperature | 0 C | 0 C | 0 C |
| Maximum Operating Temperature | + 70 C | + 70 C | + 70 C |
| Propagation Delay Time | 10 ns | 10 ns | 10 ns |
| Mounting Style | Through Hole | SMD/SMT | SMD/SMT |
| Package / Case | PDIP-20 | SOP-20 | SSOP-20 |
| Packaging | Tube | Tube | Tube |
| Product | Digital Comparators | Digital Comparators | Digital Comparators |
| Brand | ON Semiconductor / Fairchild | ON Semiconductor / Fairchild | ON Semiconductor / Fairchild |
| Input Voltage Range | - 0.5 V to + 7.0 V | - 0.5 V to + 7 V | - 0.5 V to + 7.0 V |
| Operating Supply Voltage | 5 V | 4.5 V to 5.5 V | 5 V |
| Polarity | Inverting | Inverting | Inverting |
| Product Type | Logic Comparators | Logic Comparators | Logic Comparators |
| Factory Pack Quantity | 18 | 38 | 66 |
| Subcategory | Logic ICs | Logic ICs | Logic ICs |
| Part # Aliases | 74F521PC_NL | - | - |
| Unit Weight | 0.079719 oz | 0.009408 oz | 0.016000 oz |
| Supply Current Max | - | 32 mA | - |
| High Level Output Current | - | 1 mA | - |
| Low Level Output Current | - | 20 mA | - |