The HD74LS161ARPEL is a synchronous 4-bit counter manufactured by Renesas Electronics America. It is designed with a synchronous counting operation, meaning that all flip-flops are clocked simultaneously, providing greater speed and predictability. The device has a parallel load capability, allowing the counter to be preset to any desired value.

Applications

• Frequency dividers
• Timers
• Counters
• Sequencers
• Address generators

Features

• Synchronous counting
• Parallel load capability
• Clear input
• Carry output for cascading
• High-speed operation
• Low power consumption

Benefits

• Precise timing due to synchronous operation.
• Flexibility to start counting from any desired value using parallel load.
• Easy resetting with the clear input.
• Expandable counting range by cascading multiple devices.
• Improved system performance due to high-speed counting.
• Reduced power consumption contributes to energy efficiency.

Additional Details

The HD74LS161ARPEL is a 4-bit binary counter with synchronous counting and asynchronous reset. It has four data inputs (A, B, C, D) for parallel loading, a clock input (CLK), a clear input (CLR), and two enable inputs (ENP and ENT). The counter increments on the positive-going edge of the clock pulse if both enable inputs are high. When the CLR input is low, the counter is reset to zero, regardless of the other inputs. The carry output (RCO) goes high when the counter reaches its maximum count (15) and both enable inputs are high. The device operates from a 4.75V to 5.25V supply voltage and is available in a DIP package. The operating temperature range is 0°C to +70°C.