7405: Hex Inverter (Open Collector)
All six inverters may be used independently. On any one inverter, the low-input condition drives the output to an open circuit. The high-input condition drives the output low. An output-high state can be obtained only by adding an external resistor, usually 2.2K, from output to +5 volts.
| Pin # | Pin Assignment |
|---|---|
| 1 | Input 1 |
| 2 | Output 1 |
| 3 | Input 2 |
| 4 | Output 2 |
| 5 | Input 3 |
| 6 | Output 3 |
| 7 | Ground |
| 8 | Output 4 |
| 9 | Input 4 |
| 10 | Output 5 |
| 11 | Input 5 |
| 12 | Output 6 |
| 13 | Input 6 |
| 14 | Power (+5V) |
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