| PartNumber | SN74F521DW | SN74F521DWG4 | SN74F521DWR |
| Description | Logic Comparators Octal Binary/BCD | Logic Comparators 8B Identity Magntude Comparators | Logic Comparators Octal Binary/BCD Idy Comparators w/Enable |
| Manufacturer | Texas Instruments | Texas Instruments | Texas Instruments |
| Product Category | Logic Comparators | Logic Comparators | Logic Comparators |
| RoHS | Y | Y | Y |
| Comparator Type | Magnitude | Magnitude | Magnitude |
| Number of Bits | 8 bit | 8 bit | 8 bit |
| Logic Function | A = B | A = B | A = B |
| Output Type | Active Low | 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 |
| Supply Current Max | 32 mA | 32 mA | 32 mA |
| 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 | SMD/SMT | SMD/SMT | SMD/SMT |
| Package / Case | SOIC-20 | SOIC-20 | SOIC-20 |
| Packaging | Tube | Tube | Reel |
| Product | Digital Comparators | Digital Comparators | Digital Comparators |
| Series | SN74F521 | SN74F521 | SN74F521 |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments |
| Operating Supply Voltage | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V |
| Polarity | Inverting | Inverting | Inverting |
| Product Type | Logic Comparators | Logic Comparators | Logic Comparators |
| Factory Pack Quantity | 25 | 25 | 2000 |
| Subcategory | Logic ICs | Logic ICs | Logic ICs |
| Unit Weight | 0.017662 oz | 0.017662 oz | 0.017662 oz |