Kenwood NX-720 Service Manual page 57

8pin Modular Connector Specifi cation
Pin Pin Signal
I/O
No. Name Type
1 MBL O Digital
2 SB O Power
3 GND - GND
PTT I Digital
4
TXD O Digital
5 ME - GND
6 MIC I Analog Audio input
HOOK/
7 I Digital
RXD
I Digital
8 DM
O Digital
15pin D-sub Connector Specifi cation
Pin Pin Signal
I/O
No. Name Type
SB
1 - Power
2 IGN I Digital
3 SP2/PA O Analog Speaker output
TERMINAL FUNCTION
Description/port type Item and Condition
VOH
CMOS output
VOL
Output Voltage
Switched B output
Output Current
Ground Allowable Current Value
VIH
CMOS input
(Pull Up: 5.0V/10k)
VIL
VOH
CMOS 3-State Buffer
output VOL
(Pull Up: 5.0V/10k)
Baud Rate
MIC Ground MIC Ground
Output Amplitude
(1kHz, 60% Deviation)
Coupling Capacitor
Input Impedance
Allowable Frequency
VIH
DTC144EE input
VIL
(Pull Up: 5.0V/4.7k)
Baud Rate
VIH
CMOS input/output
VIL
(Pull Up: 5.0V/47k)
VOL
Description Item and Condition
Voltage
Switched B output
Supply Current
(with KCT-60)
Ignition sense input Input Voltage
Audio Output
Coupling Capacitor
RL
Allowable Frequency
NX-720(G)/720
Min Typ Max Unit
4.2 5.2 V
- 0.8 V
This parameter depends on Bat-
tery voltage.
200 mA
200 mA
4.2 5.0 V
0 0.8 V
4.2 5.2 V
- 0.8 V
- 19200 bps
This is ground port for Micro-
phone.
- 5 - mVrms
- 10 - uF

- 600 -
300 3000 Hz
4.2 5.0 V
0 0.8 V
- 115200 bps
4.2 5.0 V
0 0.8 V
- 0.8 V
Min Typ Max Unit
This parameter depends on Bat-
tery voltage.
- - 2.0 A
- - 0.5 A
10.8 - 16 V
3 4 - W
- 330 - uF

4 - -
300 - 3000 Hz
Note
Note
at 4, 10% Distor-
tion
57