VOLTAGE CHARTS (SM-2150/VHF)
MAXON SM-2000 MOBILE
VOLTAGE CHARTS (SM-2150/VHF)
Page-51-
December 98
IC409
PIN DESCRIPTION TX RX PIN DESCRIPTION TX RX
1 DATA 0 0 21 CH-4
2 EEPROM ENABLE 0 0 22 CH-8
3 PLL ENABLE 5 5 23 MONITOR 5 5/0
4 CHANNEL SPACING 5/0 5/0 24 PTT 0 3.9
5 DATA IN 0 0 25 PROG. ENABLE 5 5
6 RED L.E.D. 5 0 26 TX ENABLE 5 0
7 BUSY 5/0 0 27 ALERT TONE 0 0
8 EXT OPTION 5 5 28 MF6 CLK CL CL
9 HOOK SW 0/3.7 0/3.7 29 CALL DETECT 0 0
10 LOCK DET 0 0 30 SEND UP CONTROL 0 0
11 TEST 5 5 72 GND 0 0
12 X1 5 5 73 VCC 5 5
13 X2 (OPEN) 0 0 74 OSC1 2.3 2.3
14 GND 0 0 75 OSC2 2.3 2.3
15 D TO A 5/0 0 76 RESET 0 0
16 D TO A 5/0 0 77 AUDIO ENABLE 5 5/0
17 TONE ENABLE 5/0 0 78 GREEN L.E.D. 0 5
18 D TO A 5/0 0 79 RX ENABLE 0 5
19 CH-1 80 CLK
20 CH-2
IC411
PIN 1 2 3 4 5 6 7 8
RX VOLTAGE 0 4 1.9 1.9 0 0 0 0
TX VOLTAGE 0 1.2 1.9 2.75 2.75 0 0 2
PIN 9 10 11 12 13 14 15 16
RX VOLTAGE 5 5 0 1.9 3.7 1.9 0.5 5
TX VOLTAGE 0 0 0 1.9 4 1.9 1.2 5
IC412 IC401
PIN TX RX PROGRAM PIN TX RX
100 100
200 200
3 3.7 3.7 0 3 2 1.8
4 3.7 3.7 0 4 2 2
500 550
6 GND GND 6 0 0
7 GND GND 7 0 0
8 GND GND 8 SAT 1.9 2
9 5 0 9 SAT 1.9 2
10 5 0 10 0 0
11 5 0 11 0 0
12 0 0 12 0 5
13 0 3.8 3.6 13 5 5
14 0 3.8 3.6 14 5 5
15 0 0 0
16 5 5
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