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VT98521 の電気的特性と機能

VT98521のメーカーはVaishali Semiconductorです、この部品の機能は「3.3V Clock Multiplier」です。


製品の詳細 ( Datasheet PDF )

部品番号 VT98521
部品説明 3.3V Clock Multiplier
メーカ Vaishali Semiconductor
ロゴ Vaishali Semiconductor ロゴ 




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VT98521 Datasheet, VT98521 PDF,ピン配置, 機能
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 pdf, ピン配列
VT98521
Table 4. Operating Conditions
Parameter
Ambient Operating Temperature
Operating Voltage, VDD
Input High Voltage, VIH, X1 pin only
Input Low Voltage, VIL, X1 pin only
Input High Voltage, VIH, OE pin
Input Low Voltage, VIL, OE pin
Input High Voltage, VIH, trinary inputs
Input Low Voltage, VIL, trinary inputs
Min
0
3
2.5
2
VDD-0.5
Typ
1.65
1.65
Max
70
3.6
0.5
0.8
0.5
Units
°C
V
V
V
V
V
V
V
DC Characteristics
Table 5. DC Characteristics
VDD = 3V to 3.6V
Parameter
Output High Voltage, VOH
Output Low Voltage, VOL
Operating Supply Current, IDD (20 MHz Xtal)
Short Circuit Current
Input Capacitance
Frequency synthesis error
Condition
IOH=-25mA
IOL=25mA
No Load, 100MHz
CLK output
S0, S1, OE, X1, X2
Min Typ Max Units
2.4 V
0.4 V
25 mA
±100
mA
4 pF
0 ppm
2002-02-25
Vaishali Semiconductor
Page 3
www.vaishali.com
747 Camden Avenue, Suite C Campbell
CA 95008
Ph. 408.377.6060
MDST-0017-02
Fax 408.377.6063


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部品番号部品説明メーカ
VT98521

3.3V Clock Multiplier

Vaishali Semiconductor
Vaishali Semiconductor


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