| PartNumber | SN74HC640DW | SN74HC640ANSR | SN74HC640DWG4 |
| Description | Bus Transceivers Tri-State Octal Bus | Bus Transceivers Octal Bus Transceivers | Bus Transceivers Octal Bus Trnsceiv |
| Manufacturer | Texas Instruments | IDT (Integrated Device Technology) | - |
| Product Category | Bus Transceivers | Bus Transceivers | - |
| RoHS | Y | Y | - |
| Logic Family | HC | - | - |
| Input Level | CMOS | - | - |
| Output Level | CMOS | - | - |
| Output Type | 3-State | - | - |
| High Level Output Current | - 6 mA | - | - |
| Low Level Output Current | 6 mA | - | - |
| Propagation Delay Time | 22 ns | - | - |
| Supply Voltage Max | 6 V | - | - |
| Supply Voltage Min | 2 V | - | - |
| Minimum Operating Temperature | - 40 C | - | - |
| Maximum Operating Temperature | + 85 C | - | - |
| Package / Case | SOIC-20 | QSOP-24 | - |
| Packaging | Tube | Reel | - |
| Function | Tri-State Octal Bus | - | - |
| Height | 2.35 mm | 1.47 mm | - |
| Length | 12.8 mm | 8.7 mm | - |
| Number of Circuits | 8 | - | - |
| Operating Temperature Range | - 40 C to + 85 C | - | - |
| Product | Standard Transceiver | - | - |
| Series | SN74HC640 | 74FCT543T | - |
| Technology | CMOS | - | - |
| Width | 7.52 mm | 3.8 mm | - |
| Brand | Texas Instruments | IDT | - |
| Mounting Style | SMD/SMT | - | - |
| Number of Channels | 8 | - | - |
| Supply Current Max | 8 uA | - | - |
| Operating Supply Voltage | 2 V to 6 V | - | - |
| Polarity | Inverting | - | - |
| Product Type | Bus Transceivers | Bus Transceivers | - |
| Factory Pack Quantity | 25 | 3000 | - |
| Subcategory | Logic ICs | Logic ICs | - |
| Unit Weight | 0.017662 oz | 0.009016 oz | - |
| Part # Aliases | - | 74FCT543T IDT74FCT543CTQG8 | - |