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| PartNumber | SN74ALS257ADG4 | SN74ALS257AD | SN74ALS257ADB |
| Description | Encoders, Decoders, Multiplexers & Demultiplexers QUAD 2 Ln To 1 Ln Data SELECTR Mltplxr | Encoders, Decoders, Multiplexers & Demultiplexers Quad 2 to 1 | |
| Manufacturer | Texas Instruments | Texas Instruments | - |
| Product Category | Encoders, Decoders, Multiplexers & Demultiplexers | Encoders, Decoders, Multiplexers & Demultiplexers | - |
| RoHS | Y | Y | - |
| Product | Selectors / Multiplexers | Selectors / Multiplexers | - |
| Logic Family | ALS | ALS | - |
| Number of Input Lines | 2 Input | 2 Input | - |
| Number of Output Lines | 1 Output | 1 Output | - |
| Propagation Delay Time | 12 ns | 12 ns | - |
| Supply Voltage Min | 4.5 V | 4.5 V | - |
| Supply Voltage Max | 5.5 V | 5.5 V | - |
| Minimum Operating Temperature | 0 C | 0 C | - |
| Maximum Operating Temperature | + 70 C | + 70 C | - |
| Mounting Style | SMD/SMT | SMD/SMT | - |
| Package / Case | SOP-16 | SOP-16 | - |
| Packaging | Tube | Tube | - |
| Function | Multiplexer | The 3-state outputs do not load the data lines | - |
| Height | 1.58 mm | 1.58 mm | - |
| Length | 9.9 mm | 9.9 mm | - |
| Operating Temperature Range | 0 C to + 70 C | 0 C to + 70 C | - |
| Series | SN74ALS257A | SN74ALS257A | - |
| Technology | Bipolar | Bipolar | - |
| Width | 3.91 mm | 3.91 mm | - |
| Brand | Texas Instruments | Texas Instruments | - |
| Logic Type | Bipolar | Data Selectors/Multiplexers | - |
| High Level Output Current | - 2.6 mA | - 2.6 mA | - |
| Low Level Output Current | 24 mA | 24 mA | - |
| Maximum Clock Frequency | 75 MHz | 75 MHz | - |
| Operating Supply Voltage | 5 V | 5 V | - |
| Product Type | Encoders, Decoders, Multiplexers & Demultiplexers | Encoders, Decoders, Multiplexers & Demultiplexers | - |
| Factory Pack Quantity | 40 | 40 | - |
| Subcategory | Logic ICs | Logic ICs | - |
| Unit Weight | 0.004998 oz | 0.004998 oz | - |
| Number of Bits | - | 4 bit | - |
| Input Voltage | - | 0.8 V to + 2 V | - |
| Number of Circuits | - | Quad | - |
| Output Current | - | 24 mA | - |
| Pd Power Dissipation | - | 1.3 W | - |