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NXR-901
CONTROL I/O D-sub 25-pin Connector
Pin
Signal
Pin Name I/O
No
Type
1
NC (RSSI)
-
2
NC
-
3
NC
-
4
AI1
I
Digital
5
AI2
I
Digital
6
AI3
I
Digital
7
DG
-
8
TD
I
Analog
9
TA
I
Analog
10
RD
O
Analog
11
RA
O
Analog
12
RXG
-
13
SPM
I
Digital
14
BER_CLK
O
Digital
15
EMON
I
Digital
16
EPTT
I
Digital
17
SC
O
Digital
18
BER_DAT
O
Digital
38
TERMINAL FUNCTION
Signal Summary
-
-
-
-
-
-
Programmable
Function Input 1
/CMOS
Programmable
Function Input 2
/CMOS
Programmable
Function Input 3
/CMOS
GND
Digital GND
INPUT: 0.1kHz/0.5Vp-p
TX Data Input
(signaling)
TX Audio Input
(voice)
RX Data Output
(signaling)
Not squelched
RX Audio Output
(voice)
Squelched
GND
RX Signal GND
Speaker Mute
/CMOS
for Bit Error Rate
Clock
External Monitor
Switch
External PTT Switch
Squelch Control
for Bit Error Rate
Data
Specifi cation
Min
-
-
-
-
-
-
VIH
0.8Vcc
VIL
0
Input impedance
-
VIH
0.8Vcc
VIL
0
Input impedance
-
VIH
0.8Vcc
VIL
0
Input impedance
-
-
-
0.7
Input impedance
-
1kHz/60% Dev
270
Input impedance
-
INPUT: 60% Dev.
75
INPUT: 60% Dev.
380
-
-
VIH
0.7Vcc
VIL
-
Input impedance
-
VOH (IO=–50µA)
Vcc–0.1
VOL (IO=50µA)
-
VIH
0.8Vcc
VIL
0
Input impedance
-
VIH
0.8Vcc
VIL
0
Input impedance
-
VOH (IO=–200µA)
Vcc–2.0
VOL (IO=200µA)
-
VOH (IO=–50µA)
Vcc–0.1
VOL (IO=50µA)
-
Typ
Max
Unit
-
-
-
-
-
-
-
-
-
-
Vcc
V
Vcc=5V±2%
-
0.2Vcc
V
47k
-
47k PU to Vcc
-
Vcc
V
Vcc=5V±2%
-
0.2Vcc
V
47k
-
47k PU to Vcc
-
Vcc
V
Vcc=5V±2%
-
0.2Vcc
V
47k
-
47k PU to Vcc
-
-
-
0.75
0.8
kHzDEV
600 PD is applied
600
-
280
290
mV
600 PD is applied
600
-
80
85
mV
400
420
mV
-
-
-
-
5.5
V
Vcc=3.3V±2%
-
0.3Vcc
V
47k
-
Vcc
-
V
47k PU to Vcc
0
0.1
V
-
Vcc
V
Vcc=5V±2%
-
0.2Vcc
V
47k
-
-
Vcc
V
Vcc=5V ±2%
-
0.2Vcc
V
47k
-
-
Vcc
V
-
0.45
V
47k PU to Vcc
Vcc
-
V
0
0.1
V
Remarks
-
-
-
-
NFM
to GND.
NFM
to GND.
-
-
-
-
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