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| PartNumber | SN74LS642N | SN74LS642NE4 | SN74LS642NG4 |
| Description | Bus Transceivers Octal bus Xcvr | Bus XCVR Single 8-CH Open Collector 20-Pin PDIP Tube | |
| Manufacturer | Texas Instruments | Texas Instruments | - |
| Product Category | Bus Transceivers | Logic - Buffers, Drivers, Receivers, Transceivers | - |
| RoHS | Y | - | - |
| Logic Family | LS | - | - |
| Input Level | TTL | - | - |
| Output Level | TTL | - | - |
| Output Type | Open Collector | - | - |
| High Level Output Current | - 15 mA | - | - |
| Low Level Output Current | 24 mA | - | - |
| Propagation Delay Time | 25 ns | - | - |
| Supply Voltage Max | 5.25 V | - | - |
| Supply Voltage Min | 4.75 V | - | - |
| Minimum Operating Temperature | 0 C | - | - |
| Maximum Operating Temperature | + 70 C | - | - |
| Package / Case | PDIP-20 | - | - |
| Packaging | Tube | Tube Alternate Packaging | - |
| Function | Bus Transceiver | - | - |
| Height | 4.57 mm | - | - |
| Length | 24.33 mm | - | - |
| Number of Circuits | 8 | - | - |
| Operating Temperature Range | 0 C to + 70 C | - | - |
| Product | Standard Transceiver | - | - |
| Series | SN74LS642 | 74LS | - |
| Technology | Bipolar | - | - |
| Width | 6.35 mm | - | - |
| Brand | Texas Instruments | - | - |
| Mounting Style | Through Hole | - | - |
| Number of Channels | 8 | - | - |
| Operating Supply Voltage | 4.75 V to 5.25 V | - | - |
| Polarity | Inverting | - | - |
| Product Type | Bus Transceivers | - | - |
| Factory Pack Quantity | 20 | - | - |
| Subcategory | Logic ICs | - | - |
| Unit Weight | 0.042297 oz | - | - |
| Package Case | - | 20-DIP (0.300", 7.62mm) | - |
| Operating Temperature | - | 0°C ~ 70°C | - |
| Mounting Type | - | Through Hole | - |
| Voltage Supply | - | 4.75 V ~ 5.25 V | - |
| Supplier Device Package | - | 20-PDIP | - |
| Number of Elements | - | 1 | - |
| Current Output High Low | - | -, 24mA | - |
| Logic Type | - | Transceiver, Inverting | - |
| Number of Bits per Element | - | 8 | - |