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| PartNumber | SN74ALS642A-1DWRE4 | SN74ALS642A-1DWR | SN74ALS642A-1DWRG4 |
| Description | Bus Transceivers Octal Bus Transceiver O.C. | Bus Transceivers Octal Bus Transceiver O.C. | Bus Transceivers OCTAL BUS TRANSCEIVER O.C. |
| Manufacturer | Texas Instruments | Texas Instruments | Texas Instruments |
| Product Category | Bus Transceivers | Bus Transceivers | Bus Transceivers |
| RoHS | Y | Y | Y |
| Logic Family | 74ALS | 74ALS | ALS |
| Input Level | TTL | TTL | TTL |
| Output Level | TTL | TTL | TTL |
| Output Type | Open Collector | Open Collector | Open Collector |
| High Level Output Current | - 0.1 mA | - 0.1 mA | - 0.1 mA |
| Low Level Output Current | 48 mA | 48 mA | 48 mA |
| Propagation Delay Time | 30 ns | 30 ns | 30 ns |
| Supply Voltage Max | 5.5 V | 5.5 V | 5.5 V |
| Supply Voltage Min | 4.5 V | 4.5 V | 4.5 V |
| Minimum Operating Temperature | 0 C | 0 C | 0 C |
| Maximum Operating Temperature | + 70 C | + 70 C | + 70 C |
| Package / Case | SOIC-20 | SOIC-20 | SOIC-20 |
| Packaging | Reel | Reel | Reel |
| Function | Bus Transceiver | Bus Transceiver | Bus Transceiver |
| Height | 2.35 mm | 2.35 mm | 2.35 mm |
| Length | 12.8 mm | 12.8 mm | 12.8 mm |
| Number of Circuits | 8 | 8 | 1 |
| Product | Bipolar | Bipolar | Bipolar |
| Technology | Bipolar | Bipolar | Bipolar |
| Width | 7.52 mm | 7.52 mm | 7.52 mm |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments |
| Mounting Style | SMD/SMT | SMD/SMT | SMD/SMT |
| Number of Channels | 8 | 8 | 8 |
| Operating Supply Voltage | 4.75 V to 5.25 V | 4.75 V to 5.25 V | 5 V |
| Polarity | Inverting | Inverting | Inverting |
| Product Type | Bus Transceivers | Bus Transceivers | Bus Transceivers |
| Factory Pack Quantity | 1 | 1 | 1 |
| Subcategory | Logic ICs | Logic ICs | Logic ICs |
| Unit Weight | 0.017662 oz | 0.017662 oz | 0.017662 oz |