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| PartNumber | 74F257ASC | 74F257ASC X | 74F257ASCX |
| Description | IC MULTIPLEXER QUAD 2INP 16-SOIC | MULTIPLEXER QUAD 2IN 3ST 16SOIC | |
| Manufacturer | Fairchild Semiconductor | - | Fairchild Semiconductor |
| Product Category | Logic - Signal Switches, Multiplexers, Decoders | - | Logic - Signal Switches, Multiplexers, Decoders |
| Series | 74F | - | 74F |
| Type | Multiplexer | - | Multiplexer |
| Packaging | Tube | - | Tape & Reel (TR) |
| Package Case | 16-SOIC (0.154", 3.90mm Width) | - | 16-SOIC (0.154", 3.90mm 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 |
| Supplier Device Package | 16-SOIC | - | 16-SOIC |
| Voltage Supply Source | Single Supply | - | Single Supply |
| Circuit | 4 x 2:1 | - | 4 x 2:1 |
| Current Output High Low | 3mA, 24mA | - | 3mA, 24mA |
| Independent Circuits | 1 | - | 1 |