EESchema Schematic File Version 4
EELAYER 30 0
EELAYER END
$Descr A4 11693 8268
encoding utf-8
Sheet 5 9
Title "MAX80"
Date "2021-02-22"
Rev "0.01"
Comp "Peter o Per"
Comment1 ""
Comment2 ""
Comment3 ""
Comment4 ""
$EndDescr
$Comp
L Timer_RTC:DS3231M U12
U 1 1 60239074
P 4200 4250
F 0 "U12" H 3900 4650 50  0000 C CNN
F 1 "DS3231M+" H 4450 4650 50  0000 C CNN
F 2 "Package_SO:SOIC-16W_7.5x10.3mm_P1.27mm" H 4200 3750 50  0001 C CNN
F 3 "http://datasheets.maximintegrated.com/en/ds/DS3231M.pdf" H 4200 3650 50  0001 C CNN
F 4 "C37663" H 4200 4250 50  0001 C CNN "LCSC"
	1    4200 4250
	1    0    0    -1  
$EndComp
$Comp
L Device:Battery_Cell BT1
U 1 1 6023A838
P 5350 4250
F 0 "BT1" H 5468 4346 50  0000 L CNN
F 1 "Battery_Cell" H 5468 4255 50  0000 L CNN
F 2 "max80:BatteryHolder_Keystone_103_1x20mm" V 5350 4310 50  0001 C CNN
F 3 "~" V 5350 4310 50  0001 C CNN
F 4 "NM" H 5350 4250 50  0001 C CNN "LCSC"
	1    5350 4250
	1    0    0    -1  
$EndComp
$Comp
L Device:C_Small C47
U 1 1 6023B210
P 3650 3350
F 0 "C47" H 3450 3450 50  0000 L CNN
F 1 "100nF" H 3400 3250 50  0000 L CNN
F 2 "Capacitor_SMD:C_0402_1005Metric" H 3650 3350 50  0001 C CNN
F 3 "~" H 3650 3350 50  0001 C CNN
F 4 "C1525" H 3650 3350 50  0001 C CNN "LCSC"
	1    3650 3350
	1    0    0    -1  
$EndComp
$Comp
L power:+3V3 #PWR0114
U 1 1 6023B8B4
P 3650 3200
F 0 "#PWR0114" H 3650 3050 50  0001 C CNN
F 1 "+3V3" H 3665 3373 50  0000 C CNN
F 2 "" H 3650 3200 50  0001 C CNN
F 3 "" H 3650 3200 50  0001 C CNN
	1    3650 3200
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR0115
U 1 1 6023BEF0
P 3650 3500
F 0 "#PWR0115" H 3650 3250 50  0001 C CNN
F 1 "GND" H 3655 3327 50  0000 C CNN
F 2 "" H 3650 3500 50  0001 C CNN
F 3 "" H 3650 3500 50  0001 C CNN
	1    3650 3500
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR0117
U 1 1 6023C3E6
P 4200 4700
F 0 "#PWR0117" H 4200 4450 50  0001 C CNN
F 1 "GND" H 4205 4527 50  0000 C CNN
F 2 "" H 4200 4700 50  0001 C CNN
F 3 "" H 4200 4700 50  0001 C CNN
	1    4200 4700
	1    0    0    -1  
$EndComp
Wire Wire Line
	4200 4650 4200 4700
Wire Wire Line
	3650 3450 3650 3500
Wire Wire Line
	3650 3200 3650 3250
Wire Wire Line
	4700 4050 4750 4050
$Comp
L power:GND #PWR0118
U 1 1 6023E0A8
P 5350 4400
F 0 "#PWR0118" H 5350 4150 50  0001 C CNN
F 1 "GND" H 5355 4227 50  0000 C CNN
F 2 "" H 5350 4400 50  0001 C CNN
F 3 "" H 5350 4400 50  0001 C CNN
	1    5350 4400
	1    0    0    -1  
$EndComp
Wire Wire Line
	5350 4350 5350 4400
Wire Wire Line
	4700 4350 4750 4350
Wire Wire Line
	3600 4050 3700 4050
Wire Wire Line
	3600 4150 3700 4150
$Comp
L power:+3V3 #PWR0116
U 1 1 6023FF34
P 4100 3800
F 0 "#PWR0116" H 4100 3650 50  0001 C CNN
F 1 "+3V3" H 4050 3950 50  0000 C CNN
F 2 "" H 4100 3800 50  0001 C CNN
F 3 "" H 4100 3800 50  0001 C CNN
	1    4100 3800
	1    0    0    -1  
$EndComp
Wire Wire Line
	4100 3800 4100 3850
Text HLabel 3600 4050 0    50   Input ~ 0
SCL
Text HLabel 3600 4150 0    50   Input ~ 0
SDA
Text HLabel 4750 4050 2    50   Input ~ 0
32KHZ
Text HLabel 4750 4350 2    50   Input ~ 0
INT
Wire Wire Line
	4200 3850 4200 3750
Wire Wire Line
	4200 3750 5350 3750
Wire Wire Line
	5350 3750 5350 4050
$Comp
L Device:R_Small R9
U 1 1 6170570B
P 5050 3200
F 0 "R9" H 5109 3246 50  0000 L CNN
F 1 "6.2k" H 5109 3155 50  0000 L CNN
F 2 "Resistor_SMD:R_0402_1005Metric" H 5050 3200 50  0001 C CNN
F 3 "~" H 5050 3200 50  0001 C CNN
F 4 "C25915" H 5050 3200 50  0001 C CNN "LCSC"
	1    5050 3200
	1    0    0    -1  
$EndComp
Text HLabel 5200 3400 2    50   Input ~ 0
32KHZ
Wire Wire Line
	5050 3300 5050 3400
Wire Wire Line
	5050 3400 5200 3400
Text HLabel 6000 3400 2    50   Input ~ 0
INT
$Comp
L Device:R_Small R32
U 1 1 61706B6D
P 5850 3200
F 0 "R32" H 5909 3246 50  0000 L CNN
F 1 "6.2k" H 5909 3155 50  0000 L CNN
F 2 "Resistor_SMD:R_0402_1005Metric" H 5850 3200 50  0001 C CNN
F 3 "~" H 5850 3200 50  0001 C CNN
F 4 "C25915" H 5850 3200 50  0001 C CNN "LCSC"
	1    5850 3200
	1    0    0    -1  
$EndComp
Wire Wire Line
	5850 3400 6000 3400
Wire Wire Line
	5850 3300 5850 3400
$Comp
L power:+3V3 #PWR07
U 1 1 61707BB7
P 5050 3000
F 0 "#PWR07" H 5050 2850 50  0001 C CNN
F 1 "+3V3" H 5000 3150 50  0000 C CNN
F 2 "" H 5050 3000 50  0001 C CNN
F 3 "" H 5050 3000 50  0001 C CNN
	1    5050 3000
	1    0    0    -1  
$EndComp
Wire Wire Line
	5050 3000 5050 3100
$Comp
L power:+3V3 #PWR08
U 1 1 617081C5
P 5850 3000
F 0 "#PWR08" H 5850 2850 50  0001 C CNN
F 1 "+3V3" H 5800 3150 50  0000 C CNN
F 2 "" H 5850 3000 50  0001 C CNN
F 3 "" H 5850 3000 50  0001 C CNN
	1    5850 3000
	1    0    0    -1  
$EndComp
Wire Wire Line
	5850 3000 5850 3100
$Comp
L power:+3V3 #PWR0247
U 1 1 619A3577
P 3100 4450
F 0 "#PWR0247" H 3100 4300 50  0001 C CNN
F 1 "+3V3" H 3050 4600 50  0000 C CNN
F 2 "" H 3100 4450 50  0001 C CNN
F 3 "" H 3100 4450 50  0001 C CNN
	1    3100 4450
	1    0    0    -1  
$EndComp
Wire Wire Line
	3100 4450 3700 4450
$EndSCHEMATC