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參數(shù)資料
| 型號(hào)： | VT98501S1 |
| 廠商： | Vaishali Semiconductor |
| 英文描述： | 3.3V Low Phase Noise Clock Multiplier |
| 中文描述： | 3.3V的低相位噪聲時(shí)鐘乘法器 |
| 文件頁數(shù)： | 4/4頁 |
| 文件大?。?/td> | 77K |
| 代理商： | VT98501S1 |
VT98501
AC Characteristics
Table 7. AC Characteristics
Advance Information
2001-03-05
Vaishali Semiconductor 1300 White Oaks Road, Ste 200 Campbell CA 95008 Ph. 408.377.6060 Fax 408.377.6063
Page 4
MDST-0009-00
VDD = 3V to 3.6V over the operating temperature range
Symbol
f
osc
Input Crystal Frequency
Parameter
Condition
Min
5
Typ
Max
27
Units
MHz
f
in
Input clock frequency
2
50
MHz
f
out
Output Frequency,
14
160
MHz
t
r
Output Clock Rise Time
0.8 to 2.0V
1
ns
t
f
Output Clock Fall Time
2.0 to 0.8V
1
ns
t
od
Output Clock Duty Cycle
1.5 V, up to 160 MHz
45
49 to 51
55
%
PLL Bandwidth
10
kHz
T
PZH,
T
PZL
Output Enable Time, OE high to output on
50
ns
T
PHZ,
T
PLZ
Output Disable time, OE low to Tri-state
50
ns
t
jit
(abs)
Absolute Clock period Jitter
Deviation from mean
70
ps
t
jit
(sigma)
One Sigma Clock Period Jitter
25
ps
Note: External Crystal Connection
.
The external crystal should be connected in as close physical proximity to the VT98501 as possible. The crystal should be a
fundamental mode, parallel resonant. Do not use third overtone. Decoupling capacitors of 0.01
μ
F and 0.1
μ
F should be connected
between VDD and Ground. Capacitors should be mounted as close to the chip as possible. A 33
termination resistor may be
mounted in series with the clock output in order to minimize ringing and reflections.
Precision tuning of the crystal can be achieved by connecting a capacitor from pin X1 to ground and another from pin X2 to
ground. The value of these capacitors is determined by the crystal load capacitance. The value can be determined using the following
equation, where C
is the crystal load capacitance. Crystal capacitors (pf) = (C
L
- 5) x 2. For example, a crystal with a load
capacitance of 16 pF should have 22 pF tuning capacitors.
Figure 3. External Crystal Connection Block Diagram
Ordering Information
Part Number
Marking
Shipping/Packaging
VT98501S1
VT98501S1
Tubes
VT98501S1X
VT98501S1
Tape & Reel
VT98501/D
No. of Pins
8
8
Package
SOIC
SOIC
Temperature
0
C to +70
C
0
o
C to +70
o
C
0
o
C to +70
o
C
Crystal
CLK3
106.25MHz
X2
X1
33pF
C
X1
XTAL OSC
GEN.
GEN
OE
Load Capacitors
CLK
C
X2
C
PLL
CLOCK
External Crystal
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