| PartNumber | 74F521SJ | 74F521SC | 74F521SCX |
| Description | Logic Comparators 8-Bit Identity Comp | IC COMPARATOR IDENTITY 8B 20SOIC | IC COMPARATOR IDENTITY 8B 20SOIC |
| Manufacturer | ON Semiconductor | Fairchild Semiconductor | Fairchild Semiconductor |
| Product Category | Logic Comparators | Logic - Comparators | Logic - Comparators |
| RoHS | Y | - | - |
| Comparator Type | Identity | - | - |
| Number of Bits | 8 bit | 8 | 8 |
| Supply Voltage Max | 5.5 V | - | - |
| Supply Voltage Min | 4.5 V | - | - |
| Supply Current Max | 32 mA | - | - |
| Minimum Operating Temperature | 0 C | - | - |
| Maximum Operating Temperature | + 70 C | - | - |
| Propagation Delay Time | 10 ns | - | - |
| Mounting Style | SMD/SMT | - | - |
| Package / Case | SOP-20 | - | - |
| Packaging | Tube | Tube | Tape & Reel (TR) |
| Product | Digital Comparators | - | - |
| Brand | ON Semiconductor / Fairchild | - | - |
| Input Voltage Range | - 0.5 V to + 7 V | - | - |
| High Level Output Current | 1 mA | - | - |
| Low Level Output Current | 20 mA | - | - |
| Operating Supply Voltage | 4.5 V to 5.5 V | - | - |
| Polarity | Inverting | - | - |
| Product Type | Logic Comparators | - | - |
| Factory Pack Quantity | 38 | - | - |
| Subcategory | Logic ICs | - | - |
| Unit Weight | 0.009408 oz | - | - |
| Series | - | 74F | 74F |
| Type | - | Identity Comparator | Identity Comparator |
| Package Case | - | 20-SOIC (0.295", 7.50mm Width) | 20-SOIC (0.295", 7.50mm Width) |
| Operating Temperature | - | 0°C ~ 70°C | 0°C ~ 70°C |
| Mounting Type | - | Surface Mount | Surface Mount |
| Voltage Supply | - | 4.5 V ~ 5.5 V | 4.5 V ~ 5.5 V |
| Output | - | Active Low | Active Low |
| Output Function | - | A=B | A=B |
| Current Output High Low | - | 1mA, 20mA | 1mA, 20mA |
| Max Propagation Delay V Max CL | - | 10ns @ 5V, 50pF | 10ns @ 5V, 50pF |
| Current Quiescent | - | - | - |