參數(shù)資料
型號: ICS84327
英文描述: CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER W/INTEGRATED FANOUT BUFFER
中文描述: 水晶到3.3的LVPECL頻率合成瓦/多功能扇出緩沖器
文件頁數(shù): 8/15頁
文件大小: 249K
代理商: ICS84327
84327AM
www.icst.com/products/hiperclocks.html
REV. A SEPTEMBER 18, 2003
8
ICS84327
C
RYSTAL
-
TO
-3.3V LVPECL
F
REQUENCY
S
YNTHESIZER
W
/I
NTEGRATED
F
ANOUT
B
UFFER
PRELIMINARY
T
ERMINATION
FOR
2.5V LVPECL O
UTPUT
Figure 3Aand Figure 3Bshow examples of termination for 2.5V
LVPECL driver. These terminations are equivalent to terminat-
ing 50
to V
CC
- 2V. For V
CC
= 2.5V, the V
CC
- 2V is very close to
ground level. The R3 in Figure 3B can be eliminated and the
termination is shown in Figure 3C.
F
IGURE
3C. 2.5V LVPECL T
ERMINATION
E
XAMPLE
R2
50
Zo = 50 Ohm
VCCO=2.5V
R1
50
Zo = 50 Ohm
+
-
2.5V
2,5V LVPECL
Driver
F
IGURE
3B. 2.5V LVPECL D
RIVER
T
ERMINATION
E
XAMPLE
VCCO=2.5V
R1
50
R2
50
Zo = 50 Ohm
R3
18
2,5V LVPECL
Driver
Zo = 50 Ohm
+
-
2.5V
F
IGURE
3A. 2.5V LVPECL D
RIVER
T
ERMINATION
E
XAMPLE
R2
62.5
2.5V
2,5V LVPECL
Driver
R3
250
Zo = 50 Ohm
Zo = 50 Ohm
R4
62.5
2.5V
+
-
R1
250
VCCO=2.5V
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