If you work with digital logic circuits, you have probably come across the SN74LS04N, a simple but important integrated circuit (IC) from the 74LS family consisting of six separate inverters . Whether you are building an oscillator, a digital buffer or a signal converter, the SN74LS04N is a classic component that still works well in modern applications.
In this article, we will look at what the SN74LS04N is, how it works, where it is used and how you can integrate it into your next project. We will also show you how to find original 74 series integrated circuits and logic components online.
What is the SN74LS04N?
The SN74LS04N is a six-digit inverter integrated circuit, which means that it has six independent open ports, each with one input and one output. When a digital high signal (1) is applied to the input, a low signal (0) appears at the output, and vice versa.
This integrated circuit belongs to the Schottky low power ( LS ) family of transistor-transistor logic (TTL) devices, known for their high switching speed and low power consumption.
The SN74LS04N and other 74 series logic ICs can be found on the DRex Electronics website.
SN74LS04N Pinout and Internal Logic
Internal Logic Gate: NOT (Inverter)
The logic function for each gate is:
Y=A‾Y = \overline{A}
| A (Input) | Y (Output) |
|---|---|
| 0 | 1 |
| 1 | 0 |
SN74LS04N main features
- ✅ 6 independent ports per circuit
- Wide operating voltage range: from 4.75 V to 5.25 V (standard TTL).
- Fast switching: typical propagation delay approx. 15 ns.
- Low power consumption compared to standard TTL
- Available in DIP, SOIC and other packages.
Common applications
The SN74LS04N can be used in a variety of digital applications such as
- signal inversion
Inversion of digital signals from high to low and vice versa.
- oscillator circuits
Used in conjunction with capacitors and resistors to create a simple square wave oscillator.
- Pulse shaping
Can be used to clean up noisy signals or convert slow pulse edges into fast logic transitions.
- Logic level conversion
Can be used to convert signals to ensure system compatibility.
- Buffering and isolation
Can be used as buffers to isolate signal lines and improve driving performance.
SN74LS04N Design Tips
- Usepull-down or pull-up resistors for unused inputs to prevent floating conditions.
- Maintain the supply voltage TTL within the standard range (approximately 5 V ± 5%).
- To attenuate noise, add a 0,1 µF shunt capacitor near the chip.
- To avoid damage caused by electrostatic discharge (ESD), observe anti-static measures when handling the chip.
SN74LS04N vs. Similar Devices
| Device | Type | Family | Notes |
|---|---|---|---|
| SN74LS04N | Hex Inverter | 74LS TTL | Low power, fast switching |
| SN74HC04 | Hex Inverter | 74HC CMOS | Higher voltage range, CMOS compatible |
| SN7404 | Hex Inverter | Standard TTL | Higher power consumption |
For most 5V TTL systems, the SN74LS04N remains the top choice due to its stability and speed.
Where to buy SN74LS04N and logic components?
DRex Electronics offers a wide range of integrated logic circuits including:
- ✅ SN74LS04N and other 74LS series ICs.
- Logic gates, flip-flops, counters and buffers.
- Support sockets , connectors, resistors and capacitors.
- Development boards and prototyping accessories
We provide engineers, trainers and OEMs around the world with high quality components and fast worldwide delivery.
Check out our 74 series logic integrated circuit product range to get started .
Summary
The SN74LS04N is a versatile, easy-to-use six-digit inverter circuit that has stood the test of time in digital electronics. Whether you are building basic logic circuits, clocks or digital buffers, the SN74LS04N is fast, reliable and easy to use.
🛠️ Ready to build with the SN74LS04N?
Visit DRex Electronics for original chips, support components and expert support for your next project.
