What Is 74LS04?
The 74LS04 is a digital logic gate integrated circuit that features six inverters, also known as hex inverters. Each inverter within the chip has an output signal that is the inverse of its input signal. The six inverters share a common power supply and ground terminal, while all other connections are independent. The chip also has a certain degree of amplification capability for manually loaded output signals. Inverters are circuits capable of reversing the phase of input signals by 180 degrees. This type of circuit finds applications in analog circuits such as audio amplifiers, clock oscillators, and more.
74LS04 Pinout
74LS04 Pin Description
| Pin No. | Pin Name | Description |
|---|---|---|
| 1 | A1 | Input for the first inverter |
| 2 | Y1 | Output of the first inverter |
| 3 | A2 | Input for the second inverter |
| 4 | Y2 | Output of the second inverter |
| 5 | A3 | Input for the third inverter |
| 6 | Y3 | Output of the third inverter |
| 7 | GND | Ground: Connected to the ground or 0V supply |
| 8 | A4 | Input for the fourth inverter |
| 9 | Y4 | Output of the fourth inverter |
| 10 | A5 | Input for the fifth inverter |
| 11 | Y5 | Output of the fifth inverter |
| 12 | A6 | Input for the sixth inverter |
| 13 | Y6 | Output of the sixth inverter |
| 14 | Vcc | Positive power supply: Connected to +5V supply |
74LS04 Features
- Low power consumption
- Six independent inverters
- Compatible with TTL inputs and outputs
- Small size with a DIP package
- Wide operating voltage range
- High noise immunity
- Fast switching speed
- RoHS compliant
74LS04 Specifications
- Supply voltage: 4.75V to 5.25V
- Output current (Min): 8mA
- Operating frequency (Max): 33 MHz
- Operating temperature (Max): 70°C
- Propagation delay: 15ns
- Fan Out (TTL Loads): 20
- Package: DIP-14
74LS04 Alternative Equivalent
SN74LS04, MC74LS04, HD74LS04, CD74LS04, 74HCT04, 74HC04, 74AC04, 74HC14, etc.
74LS04 DIP14 Package Dimensions & Layout Guidance
When reverse engineering a legacy PCB or designing a new schematic, identifying the physical package is as vital as the 74ls04 pinout. The 74ls04 pinout dip14 refers to the standard Dual In-Line Package with 14 pins.
Pin Pitch: 2.54mm (0.1 inch), standard for breadboards and through-hole PCBs.
Row Spacing: 7.62mm (0.3 inch).
Understanding the 74ls04 inverter physical size ensures accurate footprint selection during PCB cloning or IC decryption replacement.
Deep Dive into 74LS04 Hex Inverter Gates Datasheet
For robust hardware debugging, reverse engineering, or IC decryption, a quick snippet of the 74ls04 hex inverter gates datasheet electrical characteristics is essential. While a single 74ls04 hex inverter gate (also known generally as a hex inverter gate) operates reliably within a supply voltage range of 4.75V to 5.25V, you must consider the critical input logic thresholds defined in the official 74ls04 hex inverter gates data sheet to avoid signal degradation.
Key electrical specifications to monitor include:
- Maximum Low-Level Input Voltage (V_IL): 0.8V
- Minimum High-Level Input Voltage (V_IH): 2.0V
- Maximum Operating Frequency: 33 MHz
- Typical Propagation Delay: 15ns
This strict threshold definition makes the 74 ls04 an ideal choice for digital signal conditioning, logic level conversion, and noise filtering across various data processing circuits.
74LS04 Applications
- LEDs or small motors
- Digital signal inversion
- Logic level conversion
- Digital clock circuits
- Data processing circuits
- Signal amplification circuits
Frequently Asked Questions (FAQ)
What is the logic function of a 74LS04 hex inverter gate?
Each 74ls04 hex inverter gate performs the fundamental NOT logic function. In Spanish-speaking engineering contexts, these are widely referred to as NOT logic gates. It takes a high logic level (1) and outputs a low logic level (0), and vice versa.
Where can I find the complete 74LS04 hex inverter gates data sheet?
You can download the full PDF 74ls04 hex inverter gates datasheet from leading semiconductor manufacturers like Texas Instruments (TI), ON Semiconductor, or Nexperia. Always verify the prefix (e.g., SN74LS04, MC74LS04) to match the exact manufacturing tolerances.
