Description
7404 IC
NOT Gate
DIP-14
The 7404 is a high-speed TTL (Transistor-Transistor Logic) integrated circuit featuring six independent inverters (NOT gates) in a 14-pin Dual In-Line Package (DIP-14). Each gate performs logical inversion: when the input is HIGH, the output is LOW, and vice versa. This IC is widely used in digital electronics for signal inversion, logic-level shifting, and oscillator circuits.
Features:
Six independent inverters (NOT gates).
TTL-compatible logic levels.
Wide operating voltage range: 4.75V to 5.25V.
Low power consumption per gate.
Specifications:
Category
Integrated Circuits (ICs)/Logic/Gates and Inverters
Manufacturer
TI
Package
PDIP-14
Input Logic Level – High
2V
Logic Family
74LS Series
Input Logic Level – Low
800mV
Operating Temperature
0℃~+70℃
Output Logic Level – Low
500mV
Output Logic Level – High
2.7V~3.4V
Propagation Delay
15ns@5V,15pF
Voltage – Supply
4.75V~5.25V
Current – Output High (IOH)
400uA
Number of Channels
6;1
Current – Output Low (IOL)
8mA
Pin Configuration:
Foot Print:
Explanation of the circuit:
When switch is off, input pin of NOT gate will get connected to ground through the pull down resistor. Gate will consider it as logical LOW, So output will be HIGH and LED will turn ON. If the input pin is left unconnected ( not connected to pull down resistor and switch ), IC will assume itself that, voltage at the gate input is logical HIGH. So, turning off the switch without connecting pull down resistor will not give logical LOW at the input. That is, switch will have no effect in changing the voltage level at the gate input if pull down resistor is not connected. Similarly, when the switch turns on, voltage across the input pin will be 5V. Gate will consider it as logical HIGH. so the output will be logical LOW. This will turn off the LED. A current limiting resistor is provided in series with LED to protect LED from overcurrent. Truth table of this circuit is given below.
Applications:
Signal inversion in digital circuits.
Logic-level shifting between different voltage systems.
Oscillator circuits for clock generation.
Pulse shaping and signal conditioning.
Interface between CMOS and TTL logic families.
Datasheet:
SN74LS04
Reviews
There are no reviews yet.