4520 Dual Synchronous 4-bit Binary Up Counters

Pin Arrangement

Truth Table

    INPUTS ACTION Effect
    CK0 CK1 CL Pin 1, 9 Pin 2, 10
    LH 1 0 Count Up CLK0 CK EN
    LH 0 0 Hold
    HL x 0 Hold
    0 HL 0 Count Up
    CK EN

    CLK1
    1 HL 0Hold
    x LH 0Hold
    x x 1 Reset - -

Electrical Characteristics

    Operating Range
    VDDBUBH74HCUnit
    Min33-2V
    Max1818-6V

    Timming
    4001B
    Output VDD = 5V VDD = 15V Unit
    typ max typ max
    Rising Time 180 360 65 130 nS
    Falling Time 100 200 40 80 nS
    Propagation
    Delay
    CKQ 280 560 80 160 nS
    CLQ 330 660 90 180 nS
    Clock Frequency 1.5 2.5 4 8 MHz

Cascade Connection

Reference

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