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    Part Img SN74HC191DR datasheet by Texas Instruments

    • 4-BIT SYNCHRONOUS UP/DOWN BINARY COUNTERS
    • Original
    • Yes
    • Yes
    • Active
    • EAR99
    • 8542.39.00.01
    • 8542.39.00.00

    SN74HC191DR datasheet preview

    SN74HC191DR Price & Stock

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    SN74HC191DR Frequently Asked Questions (FAQs)

    • The SN74HC191DR can handle clock frequencies up to 40 MHz.
    • To ensure proper reset, the reset input (R) should be held low for at least 10 ns, and then released while the clock input (CP) is low.
    • The SN74HC191DR is a 4-bit synchronous up/down counter, so it can store a maximum count value of 15 (1111 in binary).
    • Yes, the SN74HC191DR can be used as a divide-by-n counter by connecting the Q0 output to the CP input and using the load input (LD) to load the desired count value.
    • The load input (LD) is asynchronous, meaning it can be changed at any time. The count enable inputs (ENP, ENT) are synchronous, meaning they should only be changed while the clock input (CP) is low.
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