74LS05 Hex Inverter (Open Collector)
Package PDIP, SOIC Series 74LS
74LS05 overview
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. 74LS05 Hex Inverter (Open Collector) contains six independent inverters. To perform correctly, the open-collector outputs require pullup resistors. These devices may be connected to other open-collector outputs to implement active-low wired-or active-high wire-AND functions. Open-collector devices often are used to generate high VOHlevels
Key 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
Datasheet
5.pdf
74LS05 features
- Six Independent INVERT Gates
- Open Collector Outputs Require Pull-Up Resistors
- Also Available in SMD Type
- Operating Temperature to 70°C
- Standard TTL Switching Voltages
74LS05 pinout
| Pin | Name | Description |
|---|---|---|
| 1 | A1 | Inverter Gate 1 Input |
| 2 | B1 | Inverter Gate 1 Output |
| 3 | A2 | Inverter Gate 2 Input |
| 4 | B2 | Inverter Gate 2 Output |
| 5 | A3 | Inverter Gate 3 Input |
| 6 | B3 | Inverter Gate 3 Output |
| 7 | GND | Ground |
| 8 | B4 | Inverter Gate 4 Output |
| 9 | A4 | Inverter Gate 4 Input |
| 10 | B5 | Inverter Gate 5 Output |
| 11 | A5 | Inverter Gate 5 Input |
| 12 | B6 | Inverter Gate 6 Output |
| 13 | A6 | Inverter Gate 6 Input |
| 14 | VCC | Positive Supply |
74LS05 applications
- Adjustable-speed ac motor drives.
- Uninterrupted power supplies (UPS)
- Running appliances of ac used in an automobile battery.
Application circuit
More about 74LS05
74LS05 Circuit
Here is one simple circuit of 74ls05 with one resistor and LED at the output of a NOT gate.
74LS05 Alternative Equivalent
74LS04, 74LS06, 74LS07, 74LS14
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