* Z:\tmp\asc_dec_bjh7r6w2\0cfa08560807_sonar_dec2.asc
* Generated by LTspice 26.0.1 for Windows.
Vmode TX_ON 0 PULSE(0 5 0 1u 1u 0.5m 1m 1)
VEN N016 0 PULSE(0 5 0 1u 1u 2m 4m 1)
VRX_pulse1 RX+ 0 PULSE(0 50m 0.8m 0.1u 0.1u 25u 50u 10)
R7 N008 TX 1.5k
C2 N002 N005 33f
Q4 TX+ N003 N001 0 PNP
R4 N006 N010 1.5k
Q8 TX- N014 N012 0 NPN
R5 N017 N016 10k
R17 N009 Vcc 1.2k
Q5 N006 N008 0 0 NPN
R9 RX_ON Vcc 10k
R2 N004 TX 1.5k
Q11 N013 N017 Vcc 0 NPN
.model NPN NPN
.model PNP PNP
.lib C:\users\khalils\AppData\Local\LTspice\lib\cmp\standard.bjt
.backanno
.end

* LTspice schematic (.asc):
Version 4
SHEET 1 1588 1120
WIRE -1552 -752 -1856 -752
WIRE -1408 -752 -1552 -752
WIRE -1264 -752 -1408 -752
WIRE -1552 -688 -1552 -752
WIRE -1264 -688 -1264 -752
WIRE -112 -672 -160 -672
WIRE -1856 -640 -1856 -752
WIRE -1616 -640 -1712 -640
WIRE -1120 -640 -1200 -640
WIRE -224 -576 -224 -672
WIRE -224 -576 -320 -576
WIRE -112 -576 -112 -672
WIRE -112 -576 -144 -576
WIRE -1856 -528 -1856 -560
WIRE -1712 -528 -1712 -560
WIRE -1712 -528 -1856 -528
WIRE -1552 -512 -1552 -592
WIRE -1856 -496 -1856 -528
WIRE -1264 -496 -1264 -592
WIRE -1120 -496 -1120 -560
WIRE -1040 -496 -1120 -496
WIRE -224 -496 -224 -528
WIRE -656 -480 -736 -480
WIRE -624 -480 -656 -480
WIRE -528 -480 -560 -480
WIRE -320 -480 -320 -576
WIRE -320 -480 -448 -480
WIRE -256 -480 -320 -480
WIRE -112 -464 -112 -576
WIRE -112 -464 -192 -464
WIRE -16 -464 -112 -464
WIRE -1920 -448 -2000 -448
WIRE -416 -448 -432 -448
WIRE -400 -448 -416 -448
WIRE -256 -448 -320 -448
WIRE -1712 -432 -1712 -528
WIRE -1120 -432 -1120 -496
WIRE -1552 -400 -1552 -512
WIRE -1264 -400 -1264 -496
WIRE -656 -400 -656 -480
WIRE -224 -400 -224 -432
WIRE -1616 -352 -1712 -352
WIRE -2000 -320 -2000 -448
WIRE -1856 -304 -1856 -400
WIRE -1552 -224 -1552 -304
WIRE -2000 -176 -2000 -240
WIRE -2000 -176 -2064 -176
WIRE -1040 -176 -1040 -496
WIRE -1040 -176 -2000 -176
WIRE -1408 672 -1408 576
WIRE -1408 768 -1408 752
WIRE -352 768 -352 640
WIRE -1856 784 -1856 704
WIRE -1408 784 -1408 768
WIRE -224 816 -288 816
WIRE -48 816 -144 816
WIRE -2048 832 -2096 832
WIRE -1920 832 -1968 832
WIRE -1904 832 -1920 832
WIRE -1584 832 -1632 832
WIRE -1488 832 -1504 832
WIRE -1472 832 -1488 832
WIRE -1632 896 -1632 832
WIRE -1488 896 -1488 832
WIRE -1856 928 -1856 880
WIRE -2096 944 -2096 832
WIRE -1856 944 -1856 928
WIRE -352 960 -352 864
WIRE -1632 992 -1632 976
WIRE -1488 1024 -1488 976
WIRE -1408 1024 -1408 880
WIRE -1408 1024 -1488 1024
SYMBOL voltage -1632 880 R0
SYMATTR InstName mode
SYMATTR Value PULSE(0 5 0 1u 1u 0.5m 1m 1)
SYMBOL voltage -2096 928 R0
SYMATTR InstName EN
SYMATTR Value PULSE(0 5 0 1u 1u 2m 4m 1)
SYMBOL voltage -656 -416 R0
SYMATTR InstName RX_pulse1
SYMATTR Value PULSE(0 50m 0.8m 0.1u 0.1u 25u 50u 10)
SYMBOL res -2016 -336 R0
SYMATTR InstName R7
SYMATTR Value 1.5k
SYMBOL cap -160 -688 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C2
SYMATTR Value 33f
SYMBOL pnp -1616 -592 M180
SYMATTR InstName Q4
SYMBOL res -1728 -448 R0
SYMATTR InstName R4
SYMATTR Value 1.5k
SYMBOL npn -288 864 R180
SYMATTR InstName Q8
SYMBOL res -1952 816 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R5
SYMATTR Value 10k
SYMBOL res -304 -464 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R17
SYMATTR Value 1.2k
SYMBOL npn -1920 -496 R0
SYMATTR InstName Q5
SYMBOL res -1392 768 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R9
SYMATTR Value 10k
SYMBOL res -1136 -656 R0
SYMATTR InstName R2
SYMATTR Value 1.5k
SYMBOL npn -1920 784 R0
SYMATTR InstName Q11
FLAG -1856 -304 0
FLAG -1632 992 0
FLAG -1632 832 TX_ON
FLAG -1408 576 Vcc
FLAG -1408 768 RX_ON
FLAG -1552 -512 TX+
FLAG -1264 -496 TX-
FLAG -352 960 TX-
FLAG -2096 1024 0
FLAG -2064 -176 TX
FLAG -1856 624 0
FLAG -1856 928 Vcc
FLAG -320 -368 0
FLAG -224 -528 Vcc
FLAG -224 -400 0
FLAG -416 -448 Vcc
FLAG -656 -320 0
FLAG -736 -480 RX+