EESchema Schematic File Version 4
EELAYER 30 0
EELAYER END
$Descr A4 11693 8268
encoding utf-8
Sheet 6 7
Title "MAX80"
Date "2021-01-31"
Rev "0.01"
Comp "No Name"
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
	1    5350 4250
	1    0    0    -1  
$EndComp
$Comp
L Device:C_Small C47
U 1 1 6023B210
P 2900 3150
F 0 "C47" H 2992 3196 50  0000 L CNN
F 1 "100nF" H 2992 3105 50  0000 L CNN
F 2 "Capacitor_SMD:C_0402_1005Metric" H 2900 3150 50  0001 C CNN
F 3 "~" H 2900 3150 50  0001 C CNN
F 4 "C1525" H 2900 3150 50  0001 C CNN "LCSC"
	1    2900 3150
	1    0    0    -1  
$EndComp
$Comp
L power:+3V3 #PWR0114
U 1 1 6023B8B4
P 2900 3000
F 0 "#PWR0114" H 2900 2850 50  0001 C CNN
F 1 "+3V3" H 2915 3173 50  0000 C CNN
F 2 "" H 2900 3000 50  0001 C CNN
F 3 "" H 2900 3000 50  0001 C CNN
	1    2900 3000
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR0115
U 1 1 6023BEF0
P 2900 3300
F 0 "#PWR0115" H 2900 3050 50  0001 C CNN
F 1 "GND" H 2905 3127 50  0000 C CNN
F 2 "" H 2900 3300 50  0001 C CNN
F 3 "" H 2900 3300 50  0001 C CNN
	1    2900 3300
	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
	2900 3250 2900 3300
Wire Wire Line
	2900 3000 2900 3050
Wire Wire Line
	4700 4050 4750 4050
Wire Wire Line
	5350 3350 5350 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
Wire Wire Line
	4200 3350 5350 3350
Wire Wire Line
	4200 3350 4200 3850
$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 4115 3973 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
NoConn ~ 3700 4450
$EndSCHEMATC