The SN74191N is a high-performance monolithic synchronous 4-bit up/down counter from Texas Instruments, a renowned global leader in semiconductor design and manufacturing.

• Internal Carry Look-Ahead: For application in high-speed counting designs.
• Binary or Decade Mode: Can be set up to count in either binary or decade mode.
• Up and Down Counting: Capable of both up and down counting.
• Fully Synchronous Operation: Output state transition is initiated by the rising edge of the clock pulse.
• Master Reset Input: Clears all four flip-flops and sets all outputs to a low level when a high level is applied.
• Ripple-Carry Output: Provides a ripple-carry output for cascading.
• Count-Up and Count-Down Terminals: Can be used to drive the circuit in either an ascending or descending count mode.
• VCC Operating Voltage Range: 4.75V to 5.25V.
• Operating Temperature: Characterized for operation from 0°C to 70°C.
• Package: Available in a 16-pin plastic DIP.