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參數(shù)資料
| 型號： | CT266DZB |
| 廠商： | CYPRESS SEMICONDUCTOR CORP |
| 元件分類： | XO, clock |
| 英文描述： | VCO, 70 MHz |
| 文件頁數(shù)： | 1/6頁 |
| 文件大?。?/td> | 100K |
| 代理商： | CT266DZB |
Universal VCO/Buffer for CT0 Designs
CT266
Cypress Semiconductor Corporation
3901 North First Street
San Jose
CA 95134
408-943-2600
Document #: 38-07341 Rev. **
Revised January 24, 2002
Features
Wide range VCO (> 70 MHz) for all CT0 designs
Highly efficient on-chip buffer amplifier
Real standby VCO with zero chip current consumption
Transmit power cut-off for out-of-lock condition
2.0V to 5V working voltage supply
Low current consumption
Excellent frequency stability vs. VDD
Eight-pin SOIC package
Applications
This versatile VCO circuit with buffer chip can be used in
general phase-locked loop (PLL) frequency synthesizer appli-
cations such as: cordless phone, CATV, AM/FM radio, TV
tuning, satellite receiver, and other telecommunication
designs.
Description
The IMICT266 is extremely versatile for worldwide CT-0
cordless
phone
applications
in
matching
all
present
associated PLL frequency synthesizer product designs. The
VCO circuit provides a very easy way to build the particular
high-quality VCO (see Figure 2). The on-chip highly efficient
buffer amplifier will provide enough power to the antenna or
final power amplifier. This output is normally connected with
a fixed low pass filter to remove unwanted harmonics. The
VCO stand-by function stops all power consumption of the
chip and the buffer amplifier transmit power cut-off feature
provides design choice to lock detection for monitoring trans-
mitted power at out-of-lock condition of the PLL frequency
synthesizer. This chip is designed at Cypress using special
CMOS processing technology that provides wide working
supply voltage and low current consumption advantages.
Block Diagram
Pin Configuration
High Efficiency
AMPLIFIER
VCO Circuit
STP
SB
VCOin
VCOu
VD
8
3
4
5
1
6
2
Fout
7
VSS
8
7
6
5
1
2
3
4
STP
VSS
VDD
VCOut
VDD
Fout
SB
VCOin
8 - PinSOIC
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