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VT98001QX Datasheet

  • VT98001QX

  • Multifrequency Synthesizer

  • 4頁

  • VAISH

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Advance Information
VT98001
Multifrequency Synthesizer
Applications
鈥?
Set-top boxes
鈥?
MPEG Video clock source
General Description
The Vaishali VT98001 is a single-chip, integrated multiple Phase Locked Loop (PLL) clock synthesizer. The
device uses an analog Phase Locked Loop (PLL) to accept a 27 MHz crystal input to produce multiple
outputs. Selection pins are used to provide various outputs.
Features
鈥?
鈥?
鈥?
鈥?
24.576 MHz for Firewire IEEE1394 or video
digitizer
24.576 MHz / 28.224 MHz for software or
hardware modem
27 MHz buffered output clock
6.000MHz buffered output clock
鈥?
鈥?
鈥?
鈥?
鈥?
18.432 MHz for audio processor
2kHz standby clock
Zero ppm synthesis error in all clocks
(except the 2 kHz standby clock)
5V tolerant inputs
20-pin, 150 mil SSOP (QSOP)
Figure 1. Functional Block Diagram
VDD1
VDD2
VDD3
VDD4
ROM Table
24.576/
28.224 MHz
X2
Buffer
osc
27 MHz
Crystal
Select
24/28 MHz
PLL
Multiplier
X1
Buffer
24.576 MHz
MODE
18.432MHz/
6.000MHz
Divider
/PD
Buffer
Buffer
Buffer
Buffer
2kHz
27 MHz
27 MHz
GND1 GND2 GND3 GND4 GND5
2001-07-25
Vaishali Semiconductor
Page
1
www.vaishali.com
747 Camden Avenue, Suite C Campbell CA 95008
MDST-0013-00
Ph. 408.377.6060
Fax 408.377.6063

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