EESchema Schematic File Version 2
LIBS:adc_dac
LIBS:atmel_avr
LIBS:borg
LIBS:breakout_boards
LIBS:common_devices
LIBS:conn_gen
LIBS:conn_special
LIBS:digital_logic
LIBS:driver
LIBS:el_mech
LIBS:i2c
LIBS:mechanical
LIBS:opamp
LIBS:optoisol
LIBS:power
LIBS:power_supply
LIBS:radio_tv
LIBS:sensor
LIBS:serial_interface
LIBS:storage
LIBS:sureelectronics.net
LIBS:ttl-2-rs232-isol-cache
EELAYER 25 0
EELAYER END
$Descr A4 11693 8268
encoding utf-8
Sheet 1 1
Title "Isolated TTL to RS232 Converter"
Date ""
Rev "1.0"
Comp "Borg Empire"
Comment1 ""
Comment2 ""
Comment3 ""
Comment4 ""
$EndDescr
$Comp
L CONN_10 P1
U 1 1 57F66961
P 2500 3250
F 0 "P1" H 2500 3900 60  0000 C CNN
F 1 "TTL" H 2500 3800 60  0000 C CNN
F 2 "p_gen_conn:P_10_IDC" H 2500 3250 60  0001 C CNN
F 3 "" H 2500 3250 60  0000 C CNN
	1    2500 3250
	1    0    0    1   
$EndComp
Text Notes 2050 3750 0    66   ~ 0
RS485\nNC\nRTS\nCTS\nTXD\nRXD\n+3.3V\n+5V\nGND\nGND\n
$Comp
L DCDC U2
U 1 1 57F66AD2
P 4100 4400
F 0 "U2" H 4100 4050 60  0000 C CNN
F 1 "F0505S-1W" H 4100 4750 60  0000 C CNN
F 2 "misc:U_4_MORNSUN_F_S-1WR2" H 4100 4400 60  0001 C CNN
F 3 "" H 4100 4400 60  0000 C CNN
	1    4100 4400
	1    0    0    -1  
$EndComp
$Comp
L SI8442 U1
U 1 1 57F66B15
P 4100 3300
F 0 "U1" H 4100 2700 60  0000 C CNN
F 1 "SI8442" H 4100 3900 60  0000 C CNN
F 2 "u_gen_smt:U_16_SO16W" H 4100 3600 60  0001 C CNN
F 3 "" H 4100 3600 60  0000 C CNN
	1    4100 3300
	1    0    0    -1  
$EndComp
$Comp
L C C1
U 1 1 57F66BF9
P 3300 3600
F 0 "C1" V 3400 3600 50  0000 C CNN
F 1 "100n" V 3475 3600 50  0000 C CNN
F 2 "c_gen:C_SMT0805" H 3300 3600 60  0001 C CNN
F 3 "" H 3300 3600 60  0000 C CNN
	1    3300 3600
	1    0    0    -1  
$EndComp
Wire Wire Line
	3600 3800 3600 3700
Wire Wire Line
	3600 3700 3700 3700
Connection ~ 3600 3800
Wire Wire Line
	3300 3700 3300 3800
Connection ~ 3300 3800
Wire Wire Line
	3600 3500 3700 3500
Wire Wire Line
	3600 3300 3600 3500
Wire Wire Line
	3300 3500 3300 3400
Connection ~ 3300 3400
Wire Wire Line
	2800 4500 3600 4500
Wire Wire Line
	3600 4300 2900 4300
Wire Wire Line
	5100 3700 5100 5200
Wire Wire Line
	4500 3800 5100 3800
Wire Wire Line
	4500 3700 4600 3700
Wire Wire Line
	4600 3700 4600 3800
Connection ~ 4600 3800
$Comp
L C C2
U 1 1 57F67124
P 4800 3600
F 0 "C2" V 4900 3600 50  0000 C CNN
F 1 "100n" V 4975 3600 50  0000 C CNN
F 2 "c_gen:C_SMT0805" H 4800 3600 60  0001 C CNN
F 3 "" H 4800 3600 60  0000 C CNN
	1    4800 3600
	1    0    0    -1  
$EndComp
$Comp
L C C3
U 1 1 57F67167
P 5100 3600
F 0 "C3" V 5200 3600 50  0000 C CNN
F 1 "100n" V 5275 3600 50  0000 C CNN
F 2 "c_gen:C_SMT0805" H 5100 3600 60  0001 C CNN
F 3 "" H 5100 3600 60  0000 C CNN
	1    5100 3600
	1    0    0    -1  
$EndComp
Wire Wire Line
	4800 3800 4800 3700
Connection ~ 4800 3800
Connection ~ 5100 3800
Wire Wire Line
	5400 3400 5400 4300
Wire Wire Line
	4600 3400 5400 3400
Wire Wire Line
	4600 3500 4500 3500
Wire Wire Line
	4800 3500 4800 3400
Connection ~ 4800 3400
Wire Wire Line
	5100 3500 5100 3400
Connection ~ 5100 3400
Wire Wire Line
	4500 2900 5700 2900
Wire Wire Line
	5700 2900 5700 3800
Wire Wire Line
	5700 3800 6800 3800
Wire Wire Line
	5600 3900 6800 3900
Wire Wire Line
	3700 3300 3600 3300
Connection ~ 3600 3400
Wire Wire Line
	4500 3300 4600 3300
Connection ~ 4600 3400
Connection ~ 5100 4500
Connection ~ 5400 4300
$Comp
L CONN_3 P2
U 1 1 57F68AA3
P 9800 3900
F 0 "P2" H 9800 4200 60  0000 C CNN
F 1 "RS232" H 9800 4100 60  0000 C CNN
F 2 "p_gen_conn:P_3_SCRTERM_5M" H 9800 3900 60  0001 C CNN
F 3 "" H 9800 3900 60  0000 C CNN
	1    9800 3900
	-1   0    0    1   
$EndComp
Wire Wire Line
	9600 4000 9500 4000
Wire Wire Line
	9500 4000 9500 4500
Wire Wire Line
	4600 3100 4600 3500
Wire Wire Line
	5600 3900 5600 3000
Wire Wire Line
	5600 3000 4500 3000
Wire Wire Line
	4500 3100 4600 3100
Connection ~ 4600 3300
$Comp
L HOLE M1
U 1 1 57F7174F
P 8200 5200
F 0 "M1" H 8200 5050 60  0000 C CNN
F 1 "HOLE" H 8200 5350 60  0000 C CNN
F 2 "mech_gen:HOLE_4_2MM_8_4" H 8200 5200 60  0001 C CNN
F 3 "" H 8200 5200 60  0000 C CNN
	1    8200 5200
	1    0    0    -1  
$EndComp
$Comp
L HOLE M2
U 1 1 57F717E2
P 8500 5200
F 0 "M2" H 8500 5050 60  0000 C CNN
F 1 "HOLE" H 8500 5350 60  0000 C CNN
F 2 "mech_gen:HOLE_4_2MM_8_4" H 8500 5200 60  0001 C CNN
F 3 "" H 8500 5200 60  0000 C CNN
	1    8500 5200
	1    0    0    -1  
$EndComp
Text Label 3300 4500 0    60   ~ 0
GNDA
Text Label 4700 4500 0    60   ~ 0
GNDB
Text Label 4700 4300 0    60   ~ 0
+5VB
Text Label 3300 4300 0    60   ~ 0
+5VA
Text Label 2900 3000 0    60   ~ 0
RTSA
Text Label 2900 3300 0    60   ~ 0
RXDA
Text Label 2900 3200 0    60   ~ 0
TXDA
Text Label 4700 2900 0    60   ~ 0
TXDB
Text Label 4700 3000 0    60   ~ 0
RXDB
$Comp
L VIA V1
U 1 1 57F74124
P 3000 5200
F 0 "V1" H 3000 5270 60  0000 C CNN
F 1 "VIA" H 3000 5350 60  0000 C CNN
F 2 "misc:VIA25MIL" H 3000 5200 60  0001 C CNN
F 3 "" H 3000 5200 60  0000 C CNN
	1    3000 5200
	1    0    0    -1  
$EndComp
$Comp
L VIA V2
U 1 1 57F74167
P 3200 5200
F 0 "V2" H 3200 5270 60  0000 C CNN
F 1 "VIA" H 3200 5350 60  0000 C CNN
F 2 "misc:VIA25MIL" H 3200 5200 60  0001 C CNN
F 3 "" H 3200 5200 60  0000 C CNN
	1    3200 5200
	1    0    0    -1  
$EndComp
$Comp
L VIA V3
U 1 1 57F74196
P 3400 5200
F 0 "V3" H 3400 5270 60  0000 C CNN
F 1 "VIA" H 3400 5350 60  0000 C CNN
F 2 "misc:VIA25MIL" H 3400 5200 60  0001 C CNN
F 3 "" H 3400 5200 60  0000 C CNN
	1    3400 5200
	1    0    0    -1  
$EndComp
$Comp
L VIA V4
U 1 1 57F7419C
P 3600 5200
F 0 "V4" H 3600 5270 60  0000 C CNN
F 1 "VIA" H 3600 5350 60  0000 C CNN
F 2 "misc:VIA25MIL" H 3600 5200 60  0001 C CNN
F 3 "" H 3600 5200 60  0000 C CNN
	1    3600 5200
	1    0    0    -1  
$EndComp
$Comp
L VIA V5
U 1 1 57F74201
P 3800 5200
F 0 "V5" H 3800 5270 60  0000 C CNN
F 1 "VIA" H 3800 5350 60  0000 C CNN
F 2 "misc:VIA25MIL" H 3800 5200 60  0001 C CNN
F 3 "" H 3800 5200 60  0000 C CNN
	1    3800 5200
	1    0    0    -1  
$EndComp
$Comp
L VIA V6
U 1 1 57F74207
P 4000 5200
F 0 "V6" H 4000 5270 60  0000 C CNN
F 1 "VIA" H 4000 5350 60  0000 C CNN
F 2 "misc:VIA25MIL" H 4000 5200 60  0001 C CNN
F 3 "" H 4000 5200 60  0000 C CNN
	1    4000 5200
	1    0    0    -1  
$EndComp
Connection ~ 3800 5200
Connection ~ 3600 5200
Connection ~ 3400 5200
Connection ~ 3200 5200
Connection ~ 3000 5200
$Comp
L VIA V11
U 1 1 57F74D22
P 5300 5200
F 0 "V11" H 5300 5270 60  0000 C CNN
F 1 "VIA" H 5300 5350 60  0000 C CNN
F 2 "misc:VIA25MIL" H 5300 5200 60  0001 C CNN
F 3 "" H 5300 5200 60  0000 C CNN
	1    5300 5200
	1    0    0    -1  
$EndComp
$Comp
L VIA V12
U 1 1 57F74D28
P 5500 5200
F 0 "V12" H 5500 5270 60  0000 C CNN
F 1 "VIA" H 5500 5350 60  0000 C CNN
F 2 "misc:VIA25MIL" H 5500 5200 60  0001 C CNN
F 3 "" H 5500 5200 60  0000 C CNN
	1    5500 5200
	1    0    0    -1  
$EndComp
$Comp
L VIA V13
U 1 1 57F74D2E
P 5700 5200
F 0 "V13" H 5700 5270 60  0000 C CNN
F 1 "VIA" H 5700 5350 60  0000 C CNN
F 2 "misc:VIA25MIL" H 5700 5200 60  0001 C CNN
F 3 "" H 5700 5200 60  0000 C CNN
	1    5700 5200
	1    0    0    -1  
$EndComp
$Comp
L VIA V14
U 1 1 57F74D34
P 5900 5200
F 0 "V14" H 5900 5270 60  0000 C CNN
F 1 "VIA" H 5900 5350 60  0000 C CNN
F 2 "misc:VIA25MIL" H 5900 5200 60  0001 C CNN
F 3 "" H 5900 5200 60  0000 C CNN
	1    5900 5200
	1    0    0    -1  
$EndComp
$Comp
L VIA V15
U 1 1 57F74D3A
P 6100 5200
F 0 "V15" H 6100 5270 60  0000 C CNN
F 1 "VIA" H 6100 5350 60  0000 C CNN
F 2 "misc:VIA25MIL" H 6100 5200 60  0001 C CNN
F 3 "" H 6100 5200 60  0000 C CNN
	1    6100 5200
	1    0    0    -1  
$EndComp
$Comp
L VIA V16
U 1 1 57F74D40
P 6300 5200
F 0 "V16" H 6300 5270 60  0000 C CNN
F 1 "VIA" H 6300 5350 60  0000 C CNN
F 2 "misc:VIA25MIL" H 6300 5200 60  0001 C CNN
F 3 "" H 6300 5200 60  0000 C CNN
	1    6300 5200
	1    0    0    -1  
$EndComp
$Comp
L VIA V17
U 1 1 57F74D46
P 6500 5200
F 0 "V17" H 6500 5270 60  0000 C CNN
F 1 "VIA" H 6500 5350 60  0000 C CNN
F 2 "misc:VIA25MIL" H 6500 5200 60  0001 C CNN
F 3 "" H 6500 5200 60  0000 C CNN
	1    6500 5200
	1    0    0    -1  
$EndComp
$Comp
L VIA V18
U 1 1 57F74D4C
P 6700 5200
F 0 "V18" H 6700 5270 60  0000 C CNN
F 1 "VIA" H 6700 5350 60  0000 C CNN
F 2 "misc:VIA25MIL" H 6700 5200 60  0001 C CNN
F 3 "" H 6700 5200 60  0000 C CNN
	1    6700 5200
	1    0    0    -1  
$EndComp
$Comp
L VIA V19
U 1 1 57F74D52
P 6900 5200
F 0 "V19" H 6900 5270 60  0000 C CNN
F 1 "VIA" H 6900 5350 60  0000 C CNN
F 2 "misc:VIA25MIL" H 6900 5200 60  0001 C CNN
F 3 "" H 6900 5200 60  0000 C CNN
	1    6900 5200
	1    0    0    -1  
$EndComp
$Comp
L VIA V20
U 1 1 57F74D58
P 7100 5200
F 0 "V20" H 7100 5270 60  0000 C CNN
F 1 "VIA" H 7100 5350 60  0000 C CNN
F 2 "misc:VIA25MIL" H 7100 5200 60  0001 C CNN
F 3 "" H 7100 5200 60  0000 C CNN
	1    7100 5200
	1    0    0    -1  
$EndComp
Wire Wire Line
	5100 5200 7100 5200
Connection ~ 6900 5200
Connection ~ 6700 5200
Connection ~ 6500 5200
Connection ~ 6300 5200
Connection ~ 6100 5200
Connection ~ 5900 5200
Connection ~ 5700 5200
Connection ~ 5500 5200
Connection ~ 5300 5200
Connection ~ 2800 4500
Wire Wire Line
	2800 5200 4000 5200
$Comp
L MAX221 U3
U 1 1 57F7D382
P 7500 3400
F 0 "U3" H 7500 2550 60  0000 C CNN
F 1 "MAX221" H 7500 4250 60  0000 C CNN
F 2 "u_gen_smt:U_16_SSOP65" H 7500 3200 60  0001 C CNN
F 3 "" H 7500 3200 60  0000 C CNN
	1    7500 3400
	1    0    0    -1  
$EndComp
Wire Wire Line
	9500 4500 4600 4500
Wire Wire Line
	4600 4300 5900 4300
Wire Wire Line
	6700 3500 6700 4500
Wire Wire Line
	6700 4100 6800 4100
$Comp
L C C4
U 1 1 57F7DD62
P 6100 2900
F 0 "C4" V 6200 2900 50  0000 C CNN
F 1 "100n" V 6275 2900 50  0000 C CNN
F 2 "c_gen:C_SMT0805" H 6100 2900 60  0001 C CNN
F 3 "" H 6100 2900 60  0000 C CNN
	1    6100 2900
	1    0    0    -1  
$EndComp
$Comp
L C C5
U 1 1 57F7DD96
P 6100 3400
F 0 "C5" V 6200 3400 50  0000 C CNN
F 1 "100n" V 6275 3400 50  0000 C CNN
F 2 "c_gen:C_SMT0805" H 6100 3400 60  0001 C CNN
F 3 "" H 6100 3400 60  0000 C CNN
	1    6100 3400
	1    0    0    -1  
$EndComp
$Comp
L C C6
U 1 1 57F7DE30
P 8300 2900
F 0 "C6" V 8400 2900 50  0000 C CNN
F 1 "100n" V 8475 2900 50  0000 C CNN
F 2 "c_gen:C_SMT0805" H 8300 2900 60  0001 C CNN
F 3 "" H 8300 2900 60  0000 C CNN
	1    8300 2900
	1    0    0    -1  
$EndComp
$Comp
L C C7
U 1 1 57F7DE36
P 8300 3400
F 0 "C7" V 8400 3400 50  0000 C CNN
F 1 "100n" V 8475 3400 50  0000 C CNN
F 2 "c_gen:C_SMT0805" H 8300 3400 60  0001 C CNN
F 3 "" H 8300 3400 60  0000 C CNN
	1    8300 3400
	1    0    0    -1  
$EndComp
Wire Wire Line
	8200 3200 8300 3200
Wire Wire Line
	8300 3200 8300 3300
Wire Wire Line
	8300 3500 8300 3600
Wire Wire Line
	8300 3600 8200 3600
Wire Wire Line
	8200 3100 8300 3100
Wire Wire Line
	8300 3100 8300 3000
Wire Wire Line
	8300 2800 8300 2700
Wire Wire Line
	8300 2700 8200 2700
Wire Wire Line
	6100 2800 6100 2700
Wire Wire Line
	5900 2700 6800 2700
Wire Wire Line
	6800 3100 6100 3100
Wire Wire Line
	6100 3100 6100 3000
Wire Wire Line
	6800 3200 6100 3200
Wire Wire Line
	6100 3200 6100 3300
Wire Wire Line
	6100 3500 6100 4500
Connection ~ 6100 4500
Wire Wire Line
	5900 4300 5900 2700
Connection ~ 6100 2700
Wire Wire Line
	6800 3400 6700 3400
Wire Wire Line
	6700 3400 6700 2700
Connection ~ 6700 2700
Wire Wire Line
	6800 3500 6700 3500
Connection ~ 6700 4100
Wire Wire Line
	6800 3600 6700 3600
Connection ~ 6700 3600
Connection ~ 6700 4500
Wire Wire Line
	8200 3900 9600 3900
Wire Wire Line
	8200 3800 9600 3800
Wire Wire Line
	8900 4400 8900 4500
Connection ~ 8900 4500
Wire Wire Line
	9200 4400 9200 4500
Connection ~ 9200 4500
Wire Wire Line
	9200 4000 9200 3800
Connection ~ 9200 3800
Wire Wire Line
	8900 4000 8900 3900
Connection ~ 8900 3900
Text Label 8400 3800 0    60   ~ 0
TXD
Text Label 8400 3900 0    60   ~ 0
RXD
$Comp
L TVS-BIDIRECTIONAL D1
U 1 1 57F90816
P 8900 4200
F 0 "D1" V 9000 4200 50  0000 C CNN
F 1 "PSD12C" V 9075 4200 50  0000 C CNN
F 2 "d_gen:D_SOD323" H 8900 4250 60  0001 C CNN
F 3 "" H 8900 4250 60  0000 C CNN
	1    8900 4200
	1    0    0    -1  
$EndComp
$Comp
L TVS-BIDIRECTIONAL D2
U 1 1 57F90F57
P 9200 4200
F 0 "D2" V 9300 4200 50  0000 C CNN
F 1 "PSD12C" V 9375 4200 50  0000 C CNN
F 2 "d_gen:D_SOD323" H 9200 4250 60  0001 C CNN
F 3 "" H 9200 4250 60  0000 C CNN
	1    9200 4200
	1    0    0    -1  
$EndComp
Text Label 2900 3400 0    60   ~ 0
+3.3VA
Wire Wire Line
	2800 2800 2800 5200
Wire Wire Line
	2800 3700 2700 3700
Wire Wire Line
	2800 3600 2700 3600
Connection ~ 2800 3700
Wire Wire Line
	2800 3800 3700 3800
Connection ~ 2800 3800
Wire Wire Line
	2800 2800 2700 2800
Text Label 2900 3100 0    60   ~ 0
CTSA
Wire Wire Line
	2700 3000 3200 3000
Wire Wire Line
	3200 3000 3200 2800
Wire Wire Line
	3200 2800 3700 2800
Wire Wire Line
	2700 3200 3300 3200
Wire Wire Line
	3300 3200 3300 2900
Wire Wire Line
	3300 2900 3700 2900
Wire Wire Line
	2700 3100 3700 3100
Wire Wire Line
	2700 3300 3400 3300
Wire Wire Line
	3400 3300 3400 3000
Wire Wire Line
	3400 3000 3700 3000
Wire Wire Line
	2700 3400 3600 3400
Connection ~ 2800 3600
Wire Wire Line
	2700 3500 2900 3500
Wire Wire Line
	2900 3500 2900 4300
$EndSCHEMATC