HD74LS161AP (74LS161)
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The HD74LS161AP, commonly known as 74LS161, is a synchronous 4-bit binary counter IC (Integrated Circuit). It is designed to count in binary from 0 to 15 and can be cascaded for higher counting applications. The IC operates using synchronous logic, where the outputs change state simultaneously with a clock signal.
Key Features:
- Binary Counter: Counts in binary from 0 to 15 (4-bit counter).
- Synchronous Operation: Outputs change simultaneously with the clock signal.
- Presettable: Can be preset to any initial value using the parallel load (PL) input.
- Cascadable: Multiple ICs can be cascaded for higher counting applications.
- Clock Enable Input: Allows disabling the clock input and the asynchronous reset function.
- Low Power Consumption: Suitable for battery-operated devices.
- Package Type: Available in various package options, including PDIP and SOP.
- Frequency division and counting applications.
- Digital clocks and timers.
- Sequential logic circuits.
- Event counting in microcontroller systems.
- Education and learning projects.
Technical Specifications:
- Logic Family: CMOS
- Number of Channels: 3
- Switch Configuration: Single-Pole Double-Throw (SPDT)
- Supply Voltage Range: 3V to 15V
- “ON” Resistance (R_ON): 125Ω typical at V_DD = 10V
- “OFF” Leakage Current (I_OFF): ±100pA typical at V_DD = 10V
- Control Input Voltage (V_IH): 0.7 V_DD min, 0.3 V_DD max
- Maximum Operating Frequency: 40 MHz at V_DD = 10V
Applications:
- Signal routing and switching
- Analog and digital multiplexing
- Audio and video signal processing
- Data acquisition systems
- Test equipment