The IC component DM74S161N is a 4-bit synchronous counter integrated circuit. It is commonly used in digital circuit designs for applications that require counting or sequencing functions. Here are some key features and an overview of its functionalities:
1. 4-bit Counter: The DM74S161N is a 4-bit counter, meaning it can count up to 15 (1111 in binary) before rolling over to zero. This counter is synchronous, which means it updates its output values simultaneously with the clock signal.
2. Synchronous Inputs: This IC has a clock input (CLK) that synchronizes the counting operation. The counter increments on the rising edge (transition from low to high) of the clock signal. It also has a parallel load input (PL) which allows for presetting the counter to a specific value.
3. Asynchronous Inputs: The DM74S161N includes asynchronous control inputs such as a clear input (CLR) and a clock enable input (CE). CLR resets the counter to zero when activated, regardless of the clock state. CE allows the clock signal to enable or disable the counting operation.
4. Parallel Outputs: This IC provides 4 parallel binary outputs (Q0, Q1, Q2, Q3) representing the count value. These outputs directly correspond to the binary representation of the current count. These outputs can be used to interface with other digital components or display devices like LEDs
