The CD74AC191E from Texas Instruments is a high-speed CMOS logic Presettable 4-Bit Binary Up/Down Counter designed for use in sophisticated electronic systems. This integrated circuit (IC) features the robustness of CMOS technology and is ideal for applications requiring counting sequences in both directions—up and down. It is a versatile component that can be utilized in a wide range of counting applications such as frequency division, digital clocks, and position tracking in robotics.

Key Features:

• Logic Type: 4-Bit Binary Counter
• Counting Sequence: Up/Down with asynchronous clear
• Operating Voltage Range: 1.5V to 5.5V, accommodating a variety of logic level requirements
• High-Speed Performance: Capable of operating at frequencies up to 100 MHz at 5V
• Output Capability: Standard outputs with a fan-out of 10 LS-TTL loads
• Presettable: The counter can be preset by applying a value on the preset inputs (P0-P3)
• Asynchronous Clear: The counter can be cleared to zero by a high level on the clear input
• Package: Available in a standard 16-pin DIP package, making it easy to integrate into a variety of circuit boards

Applications:

• Digital clocks and timers
• Frequency dividers
• Programmable counters
• Motor speed control and position sensing
• Process control counters
• General-purpose up/down counting applications

The CD74AC191E is a testament to Texas Instruments' commitment to providing high-quality, reliable components for the electronics industry. With its high-speed operation and flexible voltage range, this counter IC is an excellent choice for designers looking for a dependable solution to their counting needs.