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| PartNumber | SN74LS640DW | SN74LS640DBR | SN74LS640DBRG4 |
| Description | Bus Transceivers Octal bus Transceiver | Bus Transceivers Octal bus Trnscvrs | Bus Transceivers Octal bus Trnscvrs |
| Manufacturer | Texas Instruments | Texas Instruments | - |
| Product Category | Bus Transceivers | Bus Transceivers | - |
| RoHS | Y | Y | - |
| Logic Family | LS | - | - |
| Input Level | TTL | - | - |
| Output Level | TTL | - | - |
| Output Type | 3-State/Open Collector | - | - |
| High Level Output Current | - 15 mA | - | - |
| Low Level Output Current | 24 mA | - | - |
| Propagation Delay Time | 15 ns | - | - |
| Supply Voltage Max | 5.25 V | - | - |
| Supply Voltage Min | 4.75 V | - | - |
| Minimum Operating Temperature | 0 C | 0 C | - |
| Maximum Operating Temperature | + 70 C | + 70 C | - |
| Package / Case | SOIC-20 | SSOP-20 | - |
| Packaging | Tube | Reel | - |
| Function | Bus Transceiver | - | - |
| Height | 2.35 mm | - | - |
| Length | 12.8 mm | - | - |
| Number of Circuits | 8 | - | - |
| Operating Temperature Range | 0 C to + 70 C | 0 C to + 70 C | - |
| Product | Standard Transceiver | - | - |
| Series | SN74LS640 | SN74LS640 | - |
| Technology | Bipolar | - | - |
| Width | 7.52 mm | - | - |
| Brand | Texas Instruments | Texas Instruments | - |
| Mounting Style | SMD/SMT | SMD/SMT | - |
| Number of Channels | 8 | - | - |
| Operating Supply Voltage | 4.75 V to 5.25 V | - | - |
| Polarity | Inverting | - | - |
| Product Type | Bus Transceivers | Bus Transceivers | - |
| Factory Pack Quantity | 25 | 2000 | - |
| Subcategory | Logic ICs | Logic ICs | - |
| Unit Weight | 0.017662 oz | 0.005527 oz | - |