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NX-420
55
SP/MIC Connector Specifi cation
Pin
No.
Pin
Name
I/O
Signal
Type
Description
Item and Condition
Min
Typ
Max
Unit
Note
1
PTT/
RXD
I
Digital
PTT/RXD input
Zin=10k
Input Voltage (High)
4
5
6
V
Input Voltage (Low)
0
0.5
V
2
MICI
I
Analog
External MIC input
Zin=1.8k
@1kHz
Maximum Input Voltage
1100
mVrms
Standard Input Voltage
6.7
12.5
18.3
mVrms
AF=1kHz
60% deviation
MIC sens=Normal
3
MICO
O
Analog Internal MIC output
4
OPTDET
I
Digital
External option detection
Zin=74k
5
50V
O
Power
DC 5V output
Output Voltage
4.
9
5.0
5.1
V
Io=30mA
Maximum Output Current
100
mA
6
AE
-
GND
GND
Maximum Input Current
700
mA
7
TXD
O
Digital
TXD output
Zout=6.8k
Output Voltage (High)
4.
9
5.0
5.1
V
Load=Open
Output Voltage (Low)
0
0.1
V
Load=Open
8
SPI
I
Analog Internal Speaker input
9
SPO
O
Analog Internal Audio output
Maximum Output Power
1300
mW
AF=0.3~3kHz
FM Dev.=Maximum
Load=8
P.S.=
9
.0V
Standard Output Power
400
500
mW
AF=1kHz
Load=8
THD=10%
P.S.=7.5V
TERMINAL FUNCTION
Summary of Contents for NX-420 K
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