參數(shù)資料
型號: XRT8020IL
廠商: EXAR CORP
元件分類: 數(shù)字傳輸電路
英文描述: 650 MHZ CLOCK & CRYSTAL MULTIPLIER WITH LVDS OUTPUTS
中文描述: ATM/SONET/SDH SUPPORT CIRCUIT, QCC16
封裝: 4 X 4 MM, QFN-16
文件頁數(shù): 6/12頁
文件大?。?/td> 425K
代理商: XRT8020IL
XRT8020
REV. 1.0.2
650 MHZ CLOCK & CRYSTAL MULTIPLIER WITH LVDS OUTPUTS
5
F
IGURE
3. LVDS O
UTPUT
W
AVEFORMS AND
T
EST
C
IRCUITS
1.0
CALIBRATION
T
ABLE
1: F
REQUENCY
S
ELECTION
T
ABLE
FS0
P
IN
10
FS1
P
IN
9
C
RYSTAL OR
C
LOCK
F
REQUENCY
I
NTERNAL
C
APACITOR
M
ULTIPLY
R
ATIO
O
UTPUT
D
IVIDE
O
UTPUT
F
REQUENCY
1
1
78.0 MHz Clock
NA
8x
1
624 MHz
0
1
39.0 MHz
12 pF
16x
1
624 MHz
1
0
19.5 MHz
20 pF
32x
1
624 MHz
0
0
19.5 MHz
20 pF
32x
2
312 MHz
N
OTES
:
1. Use Parallel Fundamental mode crystal
2. FS0 has an internal 50K
pull-up resistor to VDD
3. FS1 has an internal 50K
pull-down resistor to GND
T
ABLE
2: P
OWER
-
DOWN AND
O
UTPUT TRI
-
STATE SELECTION TABLE
PD
P
IN
8
OE
P
IN
7
S
TATUS
N
OTES
:
1
X
Outputs tri-stated and chip Powered-down
1. “X" = Don't care
2. PD and OE have an internal 50K
pull-down resis-
tor to ground.
0
1
Output tri-stated
V
OUT
C
L
= 5 pF
C
L
= 5 pF
R
L
= 100
OUTP
OUTN
V
OUT
V
CM
OUTP
OUTN
50
50
LDVS Levels Test Circuit
LDVS Switching Test Circuit
OUTP
OUTN
T
R
T
F
80%
20%
80%
20%
0V
VCM (Differential)
LDVS Transition Time Waveform
0V (Differential)
VOUT
50%
50%
t
skew
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