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PDF VT98521 Data sheet ( Hoja de datos )
| Número de pieza | VT98521 | |
| Descripción | 3.3V Clock Multiplier | |
| Fabricantes | Vaishali Semiconductor | |
| Logotipo |  |
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Applications
•= Low cost general-purpose clock source
VT98521
3.3V Clock Multiplier
General Description
The VT98521 is a 3.3V CMOS, clock multiplier integrated circuit. The device provides an excellent quality
high frequency output clock from a lower frequency crystal or clock input. Tri-level selection inputs S0 and
S1 are used to select any one of eight multipliers, stored in the on-board ROM, and apply it to the input to
produce the desired output, up to 220 MHz. Phase Locked Loop (PLL) technology allows the device to use
an input signal from an inexpensive crystal. When Output Enable (OE) is low, the clock output is in high
impedance state.
The VT98521, when used with an inexpensive crystal, provides a cost-effective clock source for most
electronic systems.
Features
•= Low phase noise
•= Zero ppm multiplication error
•= Input clock frequency 5 - 50 MHz.
•= Input crystal frequency 5 – 27 MHz
•= Output clock frequencies up to 220 MHz.
•= 5V-tolerant inputs and output
•= Fully Compatible with all popular CPUs
•= Duty Cycle - 45/55 up to 160 MHz.
- 40/60 160 MHz to 220 MHz
•= 25mA drive capability at TTL levels
•= High-Z output for board level testing
Figure 1. Functional Block Diagram
Figure 2. Pin Assignment
VDD
GND
S0
S1
Clock or
Xtal
input
X1/ICLK
Xtal.
Osc.
X2
PLL
Clock
Multiplier
&
ROM
Output
Buffer
CLK
Optional
caps
Output Enable
8-pin SOIC/MSOP
X1/ICLK
VDD
GND
S1
1
2
3
4
8 X2
7 OE
6 S0
5 CLK
2002-02-25
Vaishali Semiconductor
Page 1
www.vaishali.com
747 Camden Avenue, Suite C Campbell
CA 95008
Ph. 408.377.6060
MDST-0017-02
Fax 408.377.6063
1 page  
VT98521
Package Dimensions.
MSOP
VARIATIONS
(ALL ARE IN MM)
A
A1
A2
b
c
D
E
E1
L
e
oc
OC1
MIN
-
0
0.75
0.22
0.08
0.4
0°
5°
AA
NOM
-
-
0.85
-
-
3.00 BSC
4.90 BSC
3.00 BSC
0.6
0.65
-
-
MAX
1.1
0.15
0.95
0.38
0.23
0.8
8°
15°
All dimensions are in millimeters
SOIC
VARIATIONS
(ALL ARE IN MM)
AA
MIN NOM MAX
A
1.35
1.55
1.75
A1 .011
-
0.25
B
0.33
0.42
0.51
C
0.19
0.22
0.25
D
4.80
4.90
5.00
E1 3.80 3.90
4.00
e 1.27 BSC
E
5.80
6.00
6.20
h
0.25
0.38
0.50
oc 0°
5°
8°
L 0.40
-
1.27
N8
All dimensions are in millimeters
Ordering Information
Part Number
VT98521S1
VT98521S1X
VT98521M
VT98521MX
VT98521/D
VT98521/DW
Marking
VT98521S1
VT98521S1
VT98521M
VT98521M
Shipping/Packaging
Tubes
Tape & Reel
Tubes
Tape & Reel
Dice in waffle-packs
Dice in wafer form
No. of Pins
8
8
8
8
Package
SOIC
SOIC
MSOP
MSOP
Temperature
0oC to +70oC
0oC to +70oC
0oC to +70oC
0oC to +70oC
0oC to +70oC
0oC to +70oC
2002-02-25
Vaishali Semiconductor
Page 5
www.vaishali.com
747 Camden Avenue, Suite C Campbell
CA 95008
Ph. 408.377.6060
MDST-0017-02
Fax 408.377.6063
5 Page | ||
| Páginas | Total 5 Páginas | |
| PDF Descargar | [ Datasheet VT98521.PDF ] | |
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