VT73227
VCXO
(Voltage-Controlled Crystal Oscillator)
27 MHz 3.3V
Applications
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Set-top boxes
Telecom switching
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Oscillator replacement
MPEG Video clock source
General Description
The Vaishali VT73227 is a single-chip, low-jitter Voltage-Controlled-Crystal-Oscillator. The device accepts
a 27 MHz, 20 pF (pull range of 200 ppm) crystal input, and produces a low jitter output at the same
frequency. A 0 to 3.0V control signal is used to fine tune the output clock frequency in the ±100ppm range.
Features
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3.3V operating voltage
Uses inexpensive pullable crystal
12mA drive capability at TTL levels
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On-chip oscillator with 200 ppm pull
range (±100 ppm)
8 pin SOIC package
Figure 1. Functional Block Diagram
VDD1
VDD2
VIN
X2
27 MHz
Pullable
Crystal
Load Cap Control
Output
Buffer
Load
Caps
Oscillator
CLK1
X1
GND1
GND2
2001-04-02
Vaishali Semiconductor
1300 White Oaks Road, Ste. 200
Page
1
Campbell
CA 95008
Ph. 408.377.6060
MDST-0006-03
Fax 408.377.6063
VAISH [ VAISHALI SEMICONDUCTOR ]
