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| PartNumber | SN74F521NSR | SN74F521N | SN74F521NS |
| Description | Logic Comparators Octal Binary/BCD Idy Comparators w/Enable | Logic Comparators Octal Binary/BCD Idy Comparators w/Enable | Identity Comparator 8-Bit 20-Pin SOP Tube |
| Manufacturer | Texas Instruments | Texas Instruments | - |
| Product Category | Logic Comparators | Logic Comparators | - |
| RoHS | Y | Y | - |
| Comparator Type | Magnitude | Magnitude | - |
| Number of Bits | 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 | - |
| Supply Voltage Min | 4.5 V | 4.5 V | - |
| Supply Current Max | 32 mA | 32 mA | - |
| Minimum Operating Temperature | 0 C | 0 C | - |
| Maximum Operating Temperature | + 70 C | + 70 C | - |
| Propagation Delay Time | 10 ns | 10 ns | - |
| Mounting Style | SMD/SMT | Through Hole | - |
| Package / Case | SO-20 | PDIP-20 | - |
| Packaging | Reel | Tube | - |
| Product | Digital Comparators | Digital Comparators | - |
| Series | SN74F521 | SN74F521 | - |
| Brand | Texas Instruments | Texas Instruments | - |
| Operating Supply Voltage | 4.5 V to 5.5 V | 4.5 V to 5.5 V | - |
| Polarity | Inverting | Inverting | - |
| Product Type | Logic Comparators | Logic Comparators | - |
| Factory Pack Quantity | 2000 | 20 | - |
| Subcategory | Logic ICs | Logic ICs | - |
| Unit Weight | 0.009408 oz | 0.042297 oz | - |