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FX818 PDF预览

FX818

更新时间: 2022-04-01 09:21:10
品牌 Logo 应用领域
CMLMICRO /
页数 文件大小 规格书
26页 672K
描述
CTCSS SIGNALLING PROCESSOR

FX818 数据手册

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CTCSS Signalling Processor  
FX818  
1.3  
Signal List (continued)  
Package  
D2/D5  
Signal  
Name  
Description  
Pin No.  
Type  
8
9
NC  
NC  
) No internal connection. Do not make  
) any connection to these pins.  
10  
11  
A/D CAP  
NC  
O/P  
An internal reference voltage for the A to D,  
decoupled to V by an external capacitor.  
SS  
No internal connection. Do not make any  
connection to this pin.  
12  
13  
V
V
Power  
O/P  
The negative supply rail (ground).  
ss  
A bias line for the internal circuitry, held at ½  
BIAS  
V . This pin must be decoupled by a capacitor  
DD  
mounted close to the device pins.  
14  
15  
RX AMP IN  
I/P  
The inverting input to the Rx input amplifier.  
RX AMP OUT  
O/P  
The output of the Rx input amplifier and the input  
to the audio filter section.  
16  
17  
RX AUDIO OUT  
NC  
O/P  
Output of the Rx audio filter section.  
No internal connection. Do not make any  
connection to this pin.  
18  
19  
20  
21  
22  
23  
24  
SUM IN  
I/P  
O/P  
I/P  
Input to the audio summing amplifier.  
Output of the audio summing amplifier.  
Input to MOD1 audio gain control.  
Output of the CTCSS tone generator.  
Output of MOD1 audio gain control.  
Output of MOD2 audio gain control.  
SUM OUT  
MOD1 IN  
TX SUB AUDIO OUT  
MOD1  
O/P  
O/P  
O/P  
Power  
MOD2  
V
DD  
The positive supply rail. Levels and voltages are  
dependent upon this supply. This pin should be  
decoupled to V by a capacitor.  
SS  
Notes: I/P  
O/P  
=
=
Input  
Output  
ã 1997 Consumer Microcircuits Limited  
5
D/818/4  

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