74LS160 DIP Synchronous 4-Bit Decade Counter
The 74LS160 is a high speed TTL integrated circuit that functions as a synchronous, presettable decade counter. This device utilizes internal carry look-ahead circuitry to provide high speed counting for multi-stage applications. Synchronous operation is achieved by having all flip flops clocked simultaneously, which ensures that the outputs change state at the exact same time during the low to high clock transition.
This IC includes a direct clear input that is asynchronous, meaning it will reset the counter to zero regardless of the clock or other inputs. It also features a preset function that allows the counter to be loaded with any desired BCD starting value. Two enable inputs and a ripple carry output are provided to facilitate easy cascading for high speed counting chains without the need for additional external logic.
KEY FEATURES
- Synchronous counting for high speed timing applications
- Asynchronous clear input for immediate reset to zero
- Programmable look-ahead circuitry for easy cascading
- Presettable BCD outputs for starting at any value
- Low power Schottky technology for energy efficiency
- Standard 16 pin dual in line package
SPECIFICATIONS
- Supply Voltage 4.75V to 5.25V
- Operating Temperature 0 to 70 Celsius
- Logic Type TTL Low Power Schottky
- Maximum Clock Frequency 25MHz
- Typical Power Dissipation 93mW
- High Level Output Current -0.4mA
- Low Level Output Current 8mA
INTERFACES
- CLK Clock input positive edge triggered
- CLR Clear input asynchronous active low
- LOAD Parallel load input active low
- ENP Enable P input count enable
- ENT Enable T input count enable and carry control
- A B C D Parallel data inputs
- QA QB QC QD Counter BCD outputs
- RCO Ripple carry output
- VCC Positive supply voltage
- GND Ground reference
