The IC component SN74LS191N is a 4-bit synchronous, binary up/down counter. It can be used in various applications, including sequential arithmetic operations, frequency division, and programmable control systems. Below are the key features and an overview of this IC component:
1. Synchronous Counting: The SN74LS191N performs counting operations synchronously, utilizing the CLK (clock) input signal. The counter advances its output on each positive-edge clock transition.
2. 4-Bit Binary Counter: This IC has a 4-bit binary structure, allowing it to count up or down from 0 to 15 (0b0000 to 0b1111). It can operate as an up counter (UC- mode) or a down counter (DC- mode) depending on the control inputs.
3. Cascadable: The SN74LS191N has cascading capabilities, meaning multiple ICs can be interconnected to create larger counters. The carry/borrow output (CARRY/ BORROW) can be connected to the carry/borrow input (CY-B/CY-D) of another IC to extend the counter beyond 4 bits.
4. Presettable Count: This IC allows presetting of the initial counter value using the parallel inputs P0-P3. When the parallel load input (PL) is activated, the counter stores the values present at the parallel inputs, allowing for custom initialization
