| PartNumber | 74HC640D,653 | 74HC640D,652 | 74HC640DB,112 |
| Description | Bus Transceivers OCTAL BUS TRANSCVR | Bus Transceivers OCTAL BUS TRANSCVR | Bus Transceivers OCTAL BUS XCVR 3ST |
| Manufacturer | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Product Category | Logic - Buffers, Drivers, Receivers, Transceivers | Logic - Buffers, Drivers, Receivers, Transceivers | Logic - Buffers, Drivers, Receivers, Transceivers |
| Series | 74HC | 74HC | 74HC |
| Packaging | Tape & Reel (TR) | Tube | Tube |
| Package Case | 20-SOIC (0.295", 7.50mm Width) | 20-SOIC (0.295", 7.50mm Width) | 20-SSOP (0.209", 5.30mm Width) |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 125°C | -40°C ~ 125°C |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount |
| Voltage Supply | 2 V ~ 6 V | 2 V ~ 6 V | 2 V ~ 6 V |
| Supplier Device Package | 20-SO | 20-SO | 20-SSOP |
| Number of Elements | 1 | 1 | 1 |
| Current Output High Low | 7.8mA, 7.8mA | 7.8mA, 7.8mA | 7.8mA, 7.8mA |
| Logic Type | Transceiver, Inverting | Transceiver, Inverting | Transceiver, Inverting |
| Number of Bits per Element | 8 | 8 | 8 |