Kenwood NX-420 K Service Manual page 55

SP/MIC Connector Specifi cation
Pin Pin Signal
I/O
No. Name Type
PTT/
1 I Digital
RXD
2 MICI I Analog
3 MICO O Analog Internal MIC output
4 OPTDET I Digital
5 50V O Power
6 AE - GND
7 TXD O Digital
8 SPI I Analog Internal Speaker input
9 SPO O Analog Internal Audio output
TERMINAL FUNCTION
Description Item and Condition
Input Voltage (High)
PTT/RXD input
Zin=10k
Input Voltage (Low)
Maximum Input Voltage
External MIC input
Zin=1.8k@1kHz
Standard Input Voltage
External option detection
Zin=74k
Output Voltage
DC 5V output
Maximum Output Current
GND Maximum Input Current
Output Voltage (High)
TXD output
Zout=6.8k
Output Voltage (Low)
Maximum Output Power
Standard Output Power
NX-420
Min Typ Max Unit
4 5 6 V
0 0.5 V
1100 mVrms
6.7 12.5 18.3 mVrms
4.9 5.0 5.1 V
100 mA
700 mA
4.9 5.0 5.1 V
0 0.1 V
1300 mW
400 500 mW
Note
AF=1kHz
60% deviation
MIC sens=Normal
Io=30mA
Load=Open
Load=Open
AF=0.3~3kHz
FM Dev.=Maximum
Load=8
P.S.=9.0V
AF=1kHz
Load=8
THD=10%
P.S.=7.5V
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