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T73227 Datasheet(PDF) 1 Page - List of Unclassifed Manufacturers

Part No. T73227
Description  27 MHz VCXO Clock Generator IC
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Maker  ETC1 [List of Unclassifed Manufacturers]
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T73227 Datasheet(HTML) 1 Page - List of Unclassifed Manufacturers

   
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October 2002
This document contains information on a preproduction product. Specifications and information herein are subject to change without notice.
10.29.02
T73227
27 MHz VCXO Clock Generator IC
ISO9001
1.0
Features
One-chip tunable voltage controlled crystal oscillator
(VCXO) allows precise system frequency tuning
3.3V operation
8 pin SOIC and MSOP packages
Uses inexpensive 20pF pullable crystals with no
external capacitors required.
12mA drive capability at TTL levels
2.0
Applications
Set-top boxes
MPEG Video clock source
Oscillator replacement
3.0
Description
The T73227 is a single-chip, low-jitter Voltage-Controlled-
Crystal-Oscillator. The device accepts a 27 MHz, 20 pF
crystal, and produces a low jitter output at the same fre-
quency. A 0 to 3.0V control signal is used to fine tune the
output clock frequency in the ±100ppm range. This finds
use in systems that have frequency matching require-
ments, such as digital satellite receivers.
Figure 1: Block Diagram
CLK
VDD2
VDD1
X2
Load Cap Control
Output
Buffer
Load
Caps
27 MHz
Pullable
Crystal
VIN
X1
GND1
GND2
Oscillator


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