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74HCT297 데이터시트(PDF) 5 Page - NXP Semiconductors

부품명 74HCT297
상세설명  Digital phase-locked-loop filter
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제조업체  PHILIPS [NXP Semiconductors]
홈페이지  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

74HCT297 데이터시트(HTML) 5 Page - NXP Semiconductors

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September 1993
5
Philips Semiconductors
Product specification
Digital phase-locked-loop filter
74HC/HCT297
Fig.4 Functional diagram.
K-COUNTER (DIGITAL CONTROL) FUNCTION TABLE
D
C
B
A
MODULO (K)
L
L
L
L
L
L
L
L
L
L
H
H
L
H
L
H
inhibited
23
24
25
L
L
L
L
H
H
H
H
L
L
H
H
L
H
L
H
26
27
28
29
H
H
H
H
L
L
L
L
L
L
H
H
L
H
L
H
210
211
212
213
H
H
H
H
H
H
H
H
L
L
H
H
L
H
L
H
214
215
216
217
EXCLUSIVE-OR PHASE DETECTOR FUNCTION
TABLE
EDGE-CONTROLLED PHASE DETECTOR TABLE
Notes
1. H = HIGH voltage level
L = LOW voltage level
↓ = HIGH-to-LOW transition
↑ = LOW-to-HIGH transition
φA
1
φB
XORPDOUT
L
L
H
H
L
H
L
H
L
H
H
L
φA
2
φB
ECPDOUT
H or L
H or L
H or L
H or L
H
L
no change
no change


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