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Rochester Electronics 74F191PC Environmental and export classification status description

The 74F191PC is a 4-bit binary counter IC with synchronous preset and clear signals. It can count up or down depending on the control inputs and is designed to operate at high speeds. Functions: The main functions of the 74F191PC include counting up or down, presetting the counter to a specific value, clearing the counter to zero, and enabling or disabling the count operation. Applications: This IC is commonly used in various applications including digital clocks, frequency dividers, event counters, frequency synthesizers, and general-purpose counting circuits. Alternative Components: Some alternative components to the 74F191PC include the 74LS191, 74HC191, and 74HCT191, which are similar counter ICs with varying speed, power consumption, and voltage requirements. Embedded Modules: The 74F191PC can be integrated into larger circuits or systems to provide counting and sequencing capabilities. It is often used alongside other logic gates, flip-flops, and control signals to create complex digital circuits. Q&A: 1. Q: What is the maximum clock frequency supported by the 74F191PC? A: The 74F191PC can typically operate at clock frequencies up to 100 MHz. 2. Q: How does the preset feature work on the 74F191PC? A: The preset feature allows you to load a specific value into the counter, which will be used as the starting point for counting. 3. Q: Can the 74F191PC be cascaded to create larger counters? A: Yes, multiple 74F191PC ICs can be cascaded together to create larger counter systems with more bits of resolution. 4. Q: What is the power supply voltage range for the 74F191PC? A: The 74F191PC typically operates within a voltage range of 4.5V to 5.5V. 5. Q: Are there any specific considerations when connecting external control signals to the 74F191PC? A: Yes, proper timing and synchronization of control signals are crucial to ensure the correct operation of the 74F191PC, especially when switching between counting modes.