74LS390 DIP Dual 4 Bit Decade Counter (74390 IC)
The 74LS390 is a dual decade counter integrated circuit designed for frequency division and counting applications in digital systems. It contains two independent decade counters each capable of dividing input clock signals into lower frequency outputs.
Each counter section includes a divide by 2 stage and a divide by 5 stage which together form a divide by 10 counter. The IC belongs to the LS TTL logic family and is widely used in digital clocks timers event counters and frequency divider circuits. The DIP package makes it suitable for breadboard prototyping and PCB based digital electronics designs.
Key Features
- Dual decade counter integrated circuit
- Each section provides divide by 10 counting function
- Internal divide by 2 and divide by 5 counter stages
- Suitable for frequency division and counting circuits
- TTL compatible logic levels
- Two independent counter sections in one IC
- DIP package suitable for prototyping and PCB mounting
Specifications
- IC Model = 74LS390
- Equivalent IC = 74390
- Logic Type = Dual decade counter
- Logic Family = LS TTL
- Number Of Counters = 2
- Counter Structure = Divide by 2 and divide by 5 stages
- Package Type = DIP
- Operating Voltage = 4.75V to 5.25V
- Application = Frequency divider counters and digital timing circuits
Interfaces
- CP0A = Clock input for counter A divide by 2 stage
- CP1A = Clock input for counter A divide by 5 stage
- R0A = Reset input counter A
- R9A = Reset input counter A
- Q0A = Counter A output bit
- Q1A = Counter A output bit
- Q2A = Counter A output bit
- Q3A = Counter A output bit
- CP0B = Clock input for counter B divide by 2 stage
- CP1B = Clock input for counter B divide by 5 stage
- R0B = Reset input counter B
- R9B = Reset input counter B
- Q0B = Counter B output bit
- Q1B = Counter B output bit
- Q2B = Counter B output bit
- Q3B = Counter B output bit
- VCC = Power supply
- GND = Ground
