| PartNumber | SN74LS399DG4 | SN74LS399D | SN74LS399DE4 |
| Description | Encoders, Decoders, Multiplexers & Demultiplexers Quad 2 Input Multiplexers | Encoders, Decoders, Multiplexers & Demultiplexers Quadruple 2-Input | Encoders, Decoders, Multiplexers & Demultiplexers Quadruple 2-Input |
| Manufacturer | Texas Instruments | Texas Instruments | Texas Instruments |
| Product Category | Encoders, Decoders, Multiplexers & Demultiplexers | Encoders, Decoders, Multiplexers & Demultiplexers | Encoders, Decoders, Multiplexers & Demultiplexers |
| RoHS | Y | Y | Y |
| Product | Multiplexers | Selectors / Multiplexers | Multiplexers |
| Logic Family | LS | 74LS | 74LS |
| Number of Input Lines | 8 Input | 2 Input | 2 Input |
| Number of Output Lines | 4 Output | 4 Output | 4 Output |
| Propagation Delay Time | 32 ns at 5 V | 32 ns at 5 V | 32 ns at 5 V |
| Supply Voltage Min | 4.75 V | 4.75 V | 4.75 V |
| Supply Voltage Max | 5.25 V | 5.25 V | 5.25 V |
| Minimum Operating Temperature | 0 C | 0 C | 0 C |
| Maximum Operating Temperature | + 70 C | + 70 C | + 70 C |
| Mounting Style | SMD/SMT | SMD/SMT | SMD/SMT |
| Package / Case | SOP-16 | SOIC-16 | SOP-16 |
| Packaging | Tube | Tube | Tube |
| Function | Multiplexer/Register | Multiplexer/Register | Multiplexer/Register |
| Height | 1.58 mm | 1.58 mm | 1.58 mm |
| Length | 9.9 mm | 9.9 mm | 9.9 mm |
| Technology | Bipolar | Bipolar | Bipolar |
| Width | 3.91 mm | 3.91 mm | 3.91 mm |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments |
| Logic Type | Bipolar | Data Selectors/Multiplexers | Data Selectors/Multiplexers |
| High Level Output Current | - 0.4 mA | - 0.4 mA | - 0.4 mA |
| Low Level Output Current | 8 mA | 8 mA | 8 mA |
| Operating Supply Voltage | 5 V | 4.75 V to 5.25 V | 4.75 V to 5.25 V |
| Product Type | Encoders, Decoders, Multiplexers & Demultiplexers | Encoders, Decoders, Multiplexers & Demultiplexers | Encoders, Decoders, Multiplexers & Demultiplexers |
| Factory Pack Quantity | 1 | 1 | 1 |
| Subcategory | Logic ICs | Logic ICs | Logic ICs |
| Unit Weight | 0.014829 oz | 0.014829 oz | 0.014829 oz |
| Number of Bits | - | 4 bit | 4 bit |
| Number of Circuits | - | Quad | Quad |