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| 型號(hào)： | IMICT266DZB |
| 英文描述： | Voltage-Controlled Oscillator |
| 中文描述： | 壓控振蕩器 |
| 文件頁數(shù)： | 3/6頁 |
| 文件大小： | 52K |
| 代理商： | IMICT266DZB |
CT266
Universal VCO/Buffer for CT0 Designs
Approved Product
International Microcircuits,Inc.
525 Los Coches St., Milpitas, 95035 408-263-6300, FAX 408-263-6571
http:/www.imicorp.com
5/17/2000
Rev. 2.0
Page 3 of 6
Figure 2. Narrow SOIC Package Pin Assignment
Pin Descriptions
Pin #
Pin Name
2
Fout
Description
This is a highly efficient output buffer of the VCO. Normally, it can be directly connected to
a filter network for antenna matching purposes and to also reduce unwanted harmonics.
See output power versus power supply voltage on Figure 3.
3
SB
The standby pin is used to save power consumption when not using transmit signal
Output power. When it is low, the VCO is disabled, the chip has zero power
consumption. This pin has an internal pull-down.
4
5
VCOin
VCOut
These are input and output of the VCO.
They are typically connected to a varactor and respective LC network to provide a tuned
VCO circuit that operates between 46/49 MHz. See Figure 4 for circuit details.
7
VSS
Circuit ground pin.
1
6
VDD
VDD
Positive power supply pins (2.0V~5V).
8
STP
Transmit power cut-off control pin. When it is high, transmit power is in standby. It can be
controlled by lock detection (LD) of PLL frequency synthesizer to monitor transmit power
of a out-of-lock condition. It has an internal pull-down resistor.
1
2
3
4
8
7
6
5
VDD
Fout
SB
VCOin
STP
VSS
VDD
VCOut
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