rtc.sch

EESchema Schematic File Version 4
EELAYER 30 0
EELAYER END
$Descr A4 11693 8268
encoding utf-8
Sheet 13 14
Title "Rämixx500"
Date "2021-05-23"
Rev "1"
Comp "SukkoPera"
Comment1 ""
Comment2 ""
Comment3 ""
Comment4 "Licensed under CC BY-NC-SA 4.0"
$EndDescr
$Comp
L MSM6242B:MSM6242B U9
U 1 1 5CF6500A
P 7995 2125
F 0 "U9" H 7995 2890 50  0000 C CNN
F 1 "MSM6242B" H 7995 2799 50  0000 C CNN
F 2 "Package_DIP:DIP-18_W7.62mm_Socket_LongPads" H 7995 2125 50  0001 C CNN
F 3 "DOCUMENTATION" H 7995 2125 50  0001 C CNN
F 4 "RTC" H 7995 2125 50  0001 C CNN "Section"
	1    7995 2125
	1    0    0    -1  
$EndComp
Entry Wire Line
	2495 1175 2595 1275
Entry Wire Line
	2495 1275 2595 1375
Entry Wire Line
	2495 1375 2595 1475
Text Label 7085 1575 0    50   ~ 0
a2
Text Label 7085 1475 0    50   ~ 0
a3
Text Label 7085 1375 0    50   ~ 0
a4
Text Label 7085 1275 0    50   ~ 0
a5
Text GLabel 1895 1175 0    50   Input ~ 0
A[1..23]
Wire Bus Line
	2495 1175 1895 1175
Text Label 1995 1175 0    50   ~ 0
a[1..23]
Entry Wire Line
	2595 1575 2495 1475
Wire Wire Line
	7245 2075 6945 2075
Wire Wire Line
	7245 1775 6945 1775
Wire Wire Line
	7245 1875 6945 1875
Wire Wire Line
	7245 1975 6945 1975
Entry Wire Line
	6845 1675 6945 1775
Entry Wire Line
	6845 1775 6945 1875
Entry Wire Line
	6845 1875 6945 1975
Entry Wire Line
	6845 1975 6945 2075
Text GLabel 6250 1675 0    50   Input ~ 0
D[0..15]
Text Label 6455 1675 0    50   ~ 0
d[0..15]
Wire Bus Line
	6845 1675 6250 1675
Text Label 7085 1775 0    50   ~ 0
d3
Text Label 7085 1875 0    50   ~ 0
d2
Text Label 7085 1975 0    50   ~ 0
d1
Text Label 7085 2075 0    50   ~ 0
d0
$Comp
L 74xx:74LS05 U36
U 5 1 5CF7587D
P 4680 2525
F 0 "U36" H 4650 2525 50  0000 C CNN
F 1 "74LS05" H 4770 2670 50  0000 C CNN
F 2 "Package_DIP:DIP-14_W7.62mm_Socket_LongPads" H 4680 2525 50  0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74LS05" H 4680 2525 50  0001 C CNN
F 4 "FLOPPY/RTC" H 4680 2525 50  0001 C CNN "Section"
F 5 "0.668" H 4680 2525 50  0001 C CNN "Cost"
F 6 "TI" H 4680 2525 50  0001 C CNN "MFG Name"
F 7 "SN74LS05N" H 4680 2525 50  0001 C CNN "MFG Part Num"
	5    4680 2525
	1    0    0    -1  
$EndComp
$Comp
L Device:R R915
U 1 1 5CF75B36
P 5200 2130
F 0 "R915" H 5270 2176 50  0000 L CNN
F 1 "1k" H 5270 2085 50  0000 L CNN
F 2 "Raemixx500:R_Axial_DIN0309_L9.0mm_D3.2mm_P12.70mm_Horizontal" V 5130 2130 50  0001 C CNN
F 3 "~" H 5200 2130 50  0001 C CNN
	1    5200 2130
	1    0    0    -1  
$EndComp
$Comp
L power:VCC #PWR0246
U 1 1 5CF75D2B
P 5200 1825
F 0 "#PWR0246" H 5200 1675 50  0001 C CNN
F 1 "VCC" H 5217 1998 50  0000 C CNN
F 2 "" H 5200 1825 50  0001 C CNN
F 3 "" H 5200 1825 50  0001 C CNN
	1    5200 1825
	1    0    0    -1  
$EndComp
Wire Wire Line
	5200 1825 5200 1880
Wire Wire Line
	4980 2525 5200 2525
Wire Wire Line
	5200 2280 5200 2525
Connection ~ 5200 2525
Wire Wire Line
	5200 2525 7245 2525
$Comp
L Device:R R914
U 1 1 5CF763B4
P 5595 2130
F 0 "R914" H 5665 2176 50  0000 L CNN
F 1 "10k" H 5665 2085 50  0000 L CNN
F 2 "Raemixx500:R_Axial_DIN0309_L9.0mm_D3.2mm_P12.70mm_Horizontal" V 5525 2130 50  0001 C CNN
F 3 "~" H 5595 2130 50  0001 C CNN
	1    5595 2130
	1    0    0    -1  
$EndComp
Wire Wire Line
	7245 2325 5595 2325
Wire Wire Line
	5595 2325 5595 2280
Wire Wire Line
	7245 2425 5595 2425
Wire Wire Line
	5595 2425 5595 2325
Connection ~ 5595 2325
Wire Wire Line
	5595 1880 5595 1980
Wire Wire Line
	7245 2725 6505 2725
Text GLabel 6505 2725 0    50   Input ~ 0
~CLKRD
Wire Wire Line
	7245 2825 6890 2825
Text GLabel 6890 2825 0    50   Input ~ 0
~CLKWR
Wire Wire Line
	4380 2525 4015 2525
$Comp
L Device:R R916
U 1 1 5CF7CC89
P 4015 2130
F 0 "R916" H 4085 2176 50  0000 L CNN
F 1 "1k" H 4085 2085 50  0000 L CNN
F 2 "Raemixx500:R_Axial_DIN0309_L9.0mm_D3.2mm_P12.70mm_Horizontal" V 3945 2130 50  0001 C CNN
F 3 "~" H 4015 2130 50  0001 C CNN
	1    4015 2130
	1    0    0    -1  
$EndComp
Wire Wire Line
	4015 2280 4015 2525
Wire Wire Line
	4015 1980 4015 1880
Wire Wire Line
	4015 1880 5200 1880
Connection ~ 4015 2525
Connection ~ 5200 1880
Wire Wire Line
	5200 1880 5595 1880
$Comp
L Jumper:Jumper_2_Open JP9
U 1 1 5CF7DF20
P 4015 3025
F 0 "JP9" V 4015 2937 50  0000 R CNN
F 1 "Jumper_2_Open" V 3970 2937 50  0001 R CNN
F 2 "Raemixx500:Jumper2-Open" H 4015 3025 50  0001 C CNN
F 3 "~" H 4015 3025 50  0001 C CNN
F 4 "SKIP" H 4015 3025 50  0001 C CNN "MFG Name"
F 5 "SKIP" H 4015 3025 50  0001 C CNN "MFG Part Num"
F 6 "JMP" H 4015 3025 50  0001 C CNN "Section"
	1    4015 3025
	0    -1   -1   0   
$EndComp
Wire Wire Line
	4015 2825 4015 2525
Wire Wire Line
	4015 3225 4015 3310
$Comp
L power:GND #PWR0247
U 1 1 5CF7EB41
P 4015 3310
F 0 "#PWR0247" H 4015 3060 50  0001 C CNN
F 1 "GND" H 4020 3137 50  0000 C CNN
F 2 "" H 4015 3310 50  0001 C CNN
F 3 "" H 4015 3310 50  0001 C CNN
	1    4015 3310
	1    0    0    -1  
$EndComp
Wire Wire Line
	8745 2325 9175 2325
Wire Wire Line
	9175 2325 9175 2375
Wire Wire Line
	8745 2725 9175 2725
Wire Wire Line
	9175 2725 9175 2675
$Comp
L Device:C_Variable TC9
U 1 1 5CF819AD
P 9640 2325
F 0 "TC9" V 9892 2325 50  0000 C CNN
F 1 "6.8-45p" V 9801 2325 50  0000 C CNN
F 2 "Raemixx500:VariCap" H 9640 2325 50  0001 C CNN
F 3 "~" H 9640 2325 50  0001 C CNN
F 4 "RTC" H 9640 2325 50  0001 C CNN "Section"
	1    9640 2325
	0    -1   -1   0   
$EndComp
$Comp
L Device:C C911
U 1 1 5CF81C27
P 9640 2725
F 0 "C911" V 9505 2725 50  0000 C CNN
F 1 "22p" V 9785 2725 50  0000 C CNN
F 2 "Raemixx500:C_Axial_L6.3mm_D2.5mm_P10.16mm" H 9678 2575 50  0001 C CNN
F 3 "~" H 9640 2725 50  0001 C CNN
F 4 "0.141" H 9640 2725 50  0001 C CNN "Cost"
F 5 "AVX" H 9640 2725 50  0001 C CNN "MFG Name"
F 6 "SA102A220JARC" H 9640 2725 50  0001 C CNN "MFG Part Num"
	1    9640 2725
	0    1    1    0   
$EndComp
Wire Wire Line
	9175 2325 9490 2325
Connection ~ 9175 2325
Wire Wire Line
	9175 2725 9490 2725
Connection ~ 9175 2725
Wire Wire Line
	9790 2325 10120 2325
Wire Wire Line
	10120 2325 10120 2725
$Comp
L power:GND #PWR0248
U 1 1 5CF83037
P 10120 2870
F 0 "#PWR0248" H 10120 2620 50  0001 C CNN
F 1 "GND" H 10125 2697 50  0000 C CNN
F 2 "" H 10120 2870 50  0001 C CNN
F 3 "" H 10120 2870 50  0001 C CNN
	1    10120 2870
	1    0    0    -1  
$EndComp
Wire Wire Line
	9790 2725 10120 2725
Connection ~ 10120 2725
Wire Wire Line
	10120 2725 10120 2870
Wire Wire Line
	5200 1980 5200 1880
Entry Wire Line
	2595 2525 2495 2425
Wire Wire Line
	2595 2525 2870 2525
Text Label 2610 2525 0    50   ~ 0
a15
$Comp
L 74xx:74LS05 U36
U 6 1 5CF8B8D2
P 3170 2525
F 0 "U36" H 3135 2525 50  0000 C CNN
F 1 "74LS05" H 3240 2670 50  0000 C CNN
F 2 "Package_DIP:DIP-14_W7.62mm_Socket_LongPads" H 3170 2525 50  0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74LS05" H 3170 2525 50  0001 C CNN
F 4 "FLOPPY/RTC" H 3170 2525 50  0001 C CNN "Section"
F 5 "0.668" H 3170 2525 50  0001 C CNN "Cost"
F 6 "TI" H 3170 2525 50  0001 C CNN "MFG Name"
F 7 "SN74LS05N" H 3170 2525 50  0001 C CNN "MFG Part Num"
	6    3170 2525
	1    0    0    -1  
$EndComp
Wire Wire Line
	2595 1275 7245 1275
$Comp
L Device:Crystal_GND2 Y9
U 1 1 5CF90547
P 9175 2525
F 0 "Y9" V 9129 2656 50  0000 L CNN
F 1 "32768" V 9460 2405 50  0000 L CNN
F 2 "Raemixx500:Crystal_RTC" H 9175 2525 50  0001 C CNN
F 3 "~" H 9175 2525 50  0001 C CNN
F 4 "RTC" H 9175 2525 50  0001 C CNN "Section"
	1    9175 2525
	0    1    1    0   
$EndComp
Wire Wire Line
	2595 1575 7245 1575
Wire Wire Line
	2595 1475 7245 1475
Wire Wire Line
	2595 1375 7245 1375
Wire Wire Line
	8745 1775 8850 1775
Wire Wire Line
	8850 1775 8850 2525
Wire Wire Line
	8850 2525 8975 2525
$Comp
L Device:Battery_Cell BT9
U 1 1 5CF9EAEA
P 2950 5870
F 0 "BT9" H 3068 5966 50  0000 L CNN
F 1 "CR2032" H 3068 5875 50  0000 L CNN
F 2 "Raemixx500:Battery_Holder_Coin_2032_BS-7" V 2950 5930 50  0001 C CNN
F 3 "~" V 2950 5930 50  0001 C CNN
F 4 "RTC" H 2950 5870 50  0001 C CNN "Section"
	1    2950 5870
	1    0    0    -1  
$EndComp
$Comp
L Device:CP1 C913
U 1 1 5CF9EEAC
P 3805 5820
F 0 "C913" H 3920 5866 50  0000 L CNN
F 1 "4.7u" H 3920 5775 50  0000 L CNN
F 2 "Capacitor_THT:CP_Radial_D8.0mm_P5.00mm" H 3805 5820 50  0001 C CNN
F 3 "~" H 3805 5820 50  0001 C CNN
F 4 "RTC" H 3805 5820 50  0001 C CNN "Section"
F 5 "0.41" H 3805 5820 50  0001 C CNN "Cost"
F 6 "RS PRO" H 3805 5820 50  0001 C CNN "MFG Name"
F 7 "181-4685" H 3805 5820 50  0001 C CNN "MFG Part Num"
	1    3805 5820
	1    0    0    -1  
$EndComp
Wire Wire Line
	2950 5670 2950 5100
Wire Wire Line
	2950 5100 3215 5100
Wire Wire Line
	3515 5100 3805 5100
Wire Wire Line
	3805 5100 3805 5670
Wire Wire Line
	2950 5970 2950 6505
Wire Wire Line
	2950 6505 3805 6505
Wire Wire Line
	3805 6505 3805 5970
$Comp
L MSM6242B:MSM6242B U9
U 2 1 5CFA109F
P 4555 5825
F 0 "U9" H 4833 5871 50  0000 L CNN
F 1 "MSM6242B" H 4833 5780 50  0000 L CNN
F 2 "Package_DIP:DIP-18_W7.62mm_Socket_LongPads" H 4555 6225 50  0001 C CNN
F 3 "DOCUMENTATION" H 4555 6225 50  0001 C CNN
F 4 "RTC" H 4555 5825 50  0001 C CNN "Section"
	2    4555 5825
	1    0    0    -1  
$EndComp
$Comp
L Device:C C9
U 1 1 5CFA11A8
P 5490 5820
F 0 "C9" H 5605 5866 50  0000 L CNN
F 1 "330n" H 5605 5775 50  0000 L CNN
F 2 "Raemixx500:C_Axial_L6.3mm_D2.5mm_P10.16mm" H 5528 5670 50  0001 C CNN
F 3 "~" H 5490 5820 50  0001 C CNN
F 4 "KEMET" H 5490 5820 50  0001 C CNN "MFG Name"
F 5 "C412C334M5U5TA" H 5490 5820 50  0001 C CNN "MFG Part Num"
F 6 "0.078" H 5490 5820 50  0001 C CNN "Cost"
F 7 "RTC" H 5490 5820 50  0001 C CNN "Section"
	1    5490 5820
	1    0    0    -1  
$EndComp
Wire Wire Line
	3805 6505 4160 6505
Wire Wire Line
	4555 6505 4555 6325
Connection ~ 3805 6505
Wire Wire Line
	4555 6505 5490 6505
Wire Wire Line
	5490 6505 5490 5970
Connection ~ 4555 6505
Wire Wire Line
	3805 5100 4555 5100
Wire Wire Line
	4555 5100 4555 5325
Connection ~ 3805 5100
Wire Wire Line
	4555 5100 5490 5100
Wire Wire Line
	5490 5100 5490 5670
Connection ~ 4555 5100
Wire Wire Line
	4160 6505 4160 6590
$Comp
L power:GND #PWR0249
U 1 1 5CFA9604
P 4160 6590
F 0 "#PWR0249" H 4160 6340 50  0001 C CNN
F 1 "GND" H 4165 6417 50  0000 C CNN
F 2 "" H 4160 6590 50  0001 C CNN
F 3 "" H 4160 6590 50  0001 C CNN
	1    4160 6590
	1    0    0    -1  
$EndComp
Connection ~ 4160 6505
Wire Wire Line
	4160 6505 4555 6505
$Comp
L Device:D D912
U 1 1 5CFAA713
P 3805 4720
F 0 "D912" V 3851 4641 50  0000 R CNN
F 1 "1n4148" V 3760 4641 50  0000 R CNN
F 2 "Diode_THT:D_DO-35_SOD27_P12.70mm_Horizontal" H 3805 4720 50  0001 C CNN
F 3 "~" H 3805 4720 50  0001 C CNN
F 4 "RTC" H 3805 4720 50  0001 C CNN "Section"
	1    3805 4720
	0    -1   -1   0   
$EndComp
Wire Wire Line
	3805 4870 3805 5100
$Comp
L Device:D D911
U 1 1 5CFABB51
P 4095 4430
F 0 "D911" H 4095 4214 50  0000 C CNN
F 1 "1n4148" H 4095 4305 50  0000 C CNN
F 2 "Diode_THT:D_DO-35_SOD27_P12.70mm_Horizontal" H 4095 4430 50  0001 C CNN
F 3 "~" H 4095 4430 50  0001 C CNN
F 4 "RTC" H 4095 4430 50  0001 C CNN "Section"
	1    4095 4430
	-1   0    0    1   
$EndComp
$Comp
L Device:R R911
U 1 1 5CFABC9A
P 3485 4430
F 0 "R911" V 3385 4430 50  0000 C CNN
F 1 "470" V 3485 4430 50  0000 C CNN
F 2 "Raemixx500:R_Axial_DIN0309_L9.0mm_D3.2mm_P12.70mm_Horizontal" V 3415 4430 50  0001 C CNN
F 3 "~" H 3485 4430 50  0001 C CNN
	1    3485 4430
	0    1    1    0   
$EndComp
Wire Wire Line
	3635 4430 3805 4430
Wire Wire Line
	3805 4570 3805 4430
Connection ~ 3805 4430
Wire Wire Line
	3805 4430 3945 4430
$Comp
L power:VCC #PWR0250
U 1 1 5CFAE2F3
P 4450 4260
F 0 "#PWR0250" H 4450 4110 50  0001 C CNN
F 1 "VCC" H 4467 4433 50  0000 C CNN
F 2 "" H 4450 4260 50  0001 C CNN
F 3 "" H 4450 4260 50  0001 C CNN
	1    4450 4260
	1    0    0    -1  
$EndComp
Wire Wire Line
	4245 4430 4450 4430
Wire Wire Line
	4450 4260 4450 4430
$Comp
L power:+12V #PWR?
U 1 1 5CFB2BF2
P 3130 4255
AR Path="/5D2DC3A1/5CFB2BF2" Ref="#PWR?"  Part="1" 
AR Path="/5E9E4C57/5CFB2BF2" Ref="#PWR?"  Part="1" 
AR Path="/5CF615AB/5CFB2BF2" Ref="#PWR0251"  Part="1" 
F 0 "#PWR0251" H 3130 4105 50  0001 C CNN
F 1 "+12V" H 3145 4428 50  0000 C CNN
F 2 "" H 3130 4255 50  0001 C CNN
F 3 "" H 3130 4255 50  0001 C CNN
	1    3130 4255
	1    0    0    -1  
$EndComp
Wire Wire Line
	3130 4430 3335 4430
Wire Wire Line
	3130 4255 3130 4430
Text Notes 4290 4850 0    50   ~ 0
This diode is not installed in its place on original boards,\nas its cathode would connect to the other side or the\nresistor. But we'll fix this, so please install it normally.
$Comp
L Device:D D913
U 1 1 5CFBBF2C
P 3365 5100
F 0 "D913" H 3365 4884 50  0000 C CNN
F 1 "1n4148" H 3365 4975 50  0000 C CNN
F 2 "Diode_THT:D_DO-35_SOD27_P12.70mm_Horizontal" H 3365 5100 50  0001 C CNN
F 3 "~" H 3365 5100 50  0001 C CNN
F 4 "RTC" H 3365 5100 50  0001 C CNN "Section"
	1    3365 5100
	-1   0    0    1   
$EndComp
Text Notes 3165 4990 2    50   ~ 0
This diode replaces R913 on the original schematics\nso that we can use a non-rechargeable battery.
Wire Wire Line
	3470 2525 3595 2525
Wire Wire Line
	3595 2525 3595 1700
Wire Wire Line
	3595 1700 3745 1700
Text GLabel 3745 1700 2    50   Output ~ 0
~CLKCS
Connection ~ 3595 2525
Wire Wire Line
	3595 2525 4015 2525
Wire Bus Line
	6845 1675 6845 1975
Wire Bus Line
	2495 1175 2495 2425
$EndSCHEMATC