The 74LS series of integrated circuits (ICs) was one of the most popular logic families of transistor-transistor logic (TTL) logic chips. 74LS series is a bipolar, low-power Schottky IC. 74LS06 Hex Inverter Buffer/Driver (Open Collector) features high-voltage, open-collector outputs to interface with(such as MOS), or for driving high-current loads, and also are characterized for use as inverter buffers for driving TTL inputs.

74LS06 Features
- Six Independent Hex Inverter Gates
- Open Collector Outputs Require Pull-Up Resistors
- Open Collector Type Suitable for Indicator Lamps and Relays
- Input Clamping Diodes
- Standard TTL Switching Voltages
74LS06 Specifications
| Supply Voltage | 4.75 – 5.25Vdc |
| Maximum Clock Frequency | 40Mhz |
| Power Dissipation | 2mW/gate @100kHz |
| Minimum Output Current | 8mA |
| Propagation Delay | 10nS |
| Fan Out (TTL Loads) | 20 |
74LS06 Pinout Diagram

74LS06 Pin Description
| Pin No | Pin Name | Description |
| 1 | A1 | Inverter Gate 1 Input |
| 2 | Y1 | Inverter Gate 1 Output |
| 3 | A2 | Inverter Gate 2 Input |
| 4 | Y2 | Inverter Gate 2 Output |
| 5 | A3 | Inverter Gate 3 Input |
| 6 | Y3 | Inverter Gate 3 Output |
| 7 | GND | Ground |
| 8 | Y4 | Inverter Gate 4 Output |
| 9 | A4 | Inverter Gate 4 Input |
| 10 | Y5 | Inverter Gate 5 Output |
| 11 | A5 | Inverter Gate 5 Input |
| 12 | Y6 | Inverter Gate 6 Output |
| 13 | A6 | Inverter Gate 6 Input |
| 14 | VCC | Positive Supply |
74LS06 Circuit
Here is a simple circuit of 74ls06 with one 10k resistor and push-button at the input and LED, 3k resistor at the output.

Applications
- Factory Automation
- Building Automation
- Line Drivers
- Electronic Point of Sale
- Desktop or Notebook PCs
74LS06 Alternative Equivalent
74LS04, 74LS05, 74LS07
Download 74LS06 Hex Inverter Buffer/Driver (Open Collector) Datasheet from the link given below.




