CD74HCT297E datasheet(10/15 Pages) TI1

No. de pieza	CD74HCT297E

Descripción Electrónicos	High-Speed CMOS Logic Digital Phase-Locked Loop

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Fabricante Electrónico	TI1 [Texas Instruments]

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FIGURE 8. WAVEFORMS SHOWING THE PHASE INPUT (øB, øA2) TO OUTPUT (ECPDOUT) PROPAGATION DELAYS AND OUTPUT

TRANSITION TIMES

NOTE: The shaded areas indicate when the input is permitted to change for predictable output performance.

FIGURE 9. WAVEFORMS SHOWING THE CLOCK (KCP) PULSE WIDTH AND MAXIMUM CLOCK PULSE FREQUENCY, AND THE

INPUT (D/U, ENCTR) TO CLOCK (KCP) SETUP AND HOLD TIMES

øB INPUT

VS

tPHL

tPLH

tTLH

tTHL

øA2 INPUT

OUTPUT

ECPDOUT

D/U, ENCTR

tH

VS

tSU

tW

1/fMAX

tH

INPUT

KCP INPUT

CD54HC297, CD74HC297, CD74HCT297

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