전자부품 반도체 검색엔진( 무료 PDF 다운로드 ) - 데이터시트뱅크
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HD74CDC857 데이터 시트보기 (PDF) - Hitachi -> Renesas Electronics
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HD74CDC857
3.3/2.5-V Phase-lock Loop Clock Driver
Hitachi -> Renesas Electronics
HD74CDC857 Datasheet PDF : 12 Pages
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HD74CDC857
Differential clock outputs are directly terminated by a 120
Ω
resistor. Figure 2 is typical usage conditions
of outputs load.
V
DDQ
Device
under
OUT
test
OUT
V
DDQ
R
T
=
120
Ω
Figure 2 Differential signal using direct termination resistor
Differential cross
point voltage
V
ref
0.5
×
V
DDQ
V
IH
1.7 V
V
IL
0.8 V
V
IH
V
ref
+0.35 V
V
ref
V
ref
–0.35 V
V
IL
Figure 3 CLKIN waveforms
9
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