74LS09 Quad 2-input AND Gate (Open Collector)
Package PDIP, SOIC Series 74LS
74LS09 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. 74LS09 Quad 2-input AND Gate (Open Collector) contain four independent 2-input AND gates. The open-collector outputs require pull-up resistors to perform correctly. They may be connected to other open-collector outputs to implement active-low wired-OR or active-high wired-AND functions. Open-collector devices are often used to generate higher VOH levels.
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
9.pdf
74LS09 features
- Four Independent AND Gates
- Open Collector Outputs Require Pull-Up Resistors
- Open Collector Type Suitable for Indicator Lamps and Relays
- Input Clamping Diodes
- Standard TTL Switching Voltages
74LS09 pinout
| Pin | Name | Description |
|---|---|---|
| 1 | A1 | AND Gate 1 Input 1 |
| 2 | B1 | AND Gate 1 Input 2 |
| 3 | C1 | AND Gate 1 Output |
| 4 | A2 | AND Gate 2 Input 1 |
| 5 | B2 | AND Gate 2 Input 2 |
| 6 | C2 | AND Gate 2 Output |
| 7 | GND | Ground |
| 8 | C3 | AND Gate 3 Output |
| 9 | A3 | AND Gate 3 Input 1 |
| 10 | B3 | AND Gate 3 Input 2 |
| 11 | C4 | AND Gate 4 Output |
| 12 | A4 | AND Gate 4 Input 1 |
| 13 | B4 | AND Gate 4 Input 2 |
| 14 | VCC | Positive Supply |
74LS09 applications
- Data transmission control in digital electronics
- Alarm Circuits
Application circuit
More about 74LS09
74LS09 Circuit
Here is a circuit for testing 74ls09 functionality with key as a switch input and led for an output.
74LS09 Alternative Equivalent
74LS08, 74LS21
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