
71
KX-TG6641B/KX-TG6643B/KX-TG6644B/KX-TG6645B/KX-TGA660B
URX
UTX
EEP_WP
SPI_CS
EEP_SDA
SPI_CLK
EEP_SCL
LCD_CS
SPI_DO
SPI_DI
BELL
HOOK
LCD_RST
SP_LED
CHARGE_DET
HOOK
SPI2_CLK
SPI2_DO
LCD_CD
KEYS_A KEYS_B
SPI_CLK SPI_DO
SPI_DI
EEP_WP EEP_SCL EEP_SDA
PF_SUP
KEYIN3
KEYIN2
KEYIN1
KEYS_C
KEYIN4 KEYIN5 KEYS_D KEYS_E
KEYIN6_BLTL
SPI_CS
D143
NC
C473
NC
C120
1000p
D101
4
3
1
2
C184
K1.0u
L476
NC
C174 NC
ZA1 NC
1 2 3 4 5
6
7
9
11
8
10
12
R131
10M
L1R
R509 NC
C102 680p
C475
NC
+5.5V
C152
0.01u
C351
1u
C133
NC
R161
100k
R133
330k
R701
3.3k
C175 1000p
C507 K2.2u
C342
0.1u
L102
33u
R181
NC
R503
NC
C611
0.1u
*C601 0.1u
R50110
VDDC
C331
NC
R114
47k
DCP
C521
1u
C121
680p
C111
0.047u
+3.0V
R163
12
RA452 2.7k
1 2
3
4
C173
K0.22u
C513
K2.2u
R141
100k
C512
0.1u
R171
22
+3.0V
C457 0.033u
VBAT
C172
NC
L101
33u
C101 680p
+3.0V
R151
100k
R176
100
C142
K0.01u
C509
12p
C124
10p
C151
10p
L1T
DCM
C472
NC
C132
K0.01u
C460
NC
R605
3.3k
R703
1k
VBAT
+3.0V
C167
1000p
RA504 68
1
2
3
4
C176
10u
R505
2.2k
C181
NC
+3.0V
VCCA
Q141
B
E
C
*R604
10k
+5.5V
+3.0V
+3.0V
R112 100k
R612
10k
C185
NC
C122
680p
C168
NC
R144
NC
R113
10k
C115
NC
VDDC
C514
0.1u
R172
100k
R165
27k
C163 NC
C301
NC
C165NC
C522 10p
RA151
1k
1
2
3
4
VCCA
+3.0V
R164
2.7k
F301
3.0A
L474
NC
CHARGE-
C508
10p
C458 0.033u
R152
470k
R166
NC
C186
10p
R160
910
R142
2.7k
(3216)
C530
10p
C504
1u
C459
1000p
R606
3.3k
C123
10p
R145
2.2k
R111
100k
P101 22
X501
13.824M
VREF
R506
NC
GND
C461
NC
C171
0.022u
L501
100n
R601
NC
R167
27
(4532)
C113
K0.68u
C506
1u
GAP
R121
390k
C519 0.1u
+5.5V
R175
560
R122
390k
C112
0.047u
C321
1u
+5.5V
C501
0.1u
C510
K1u
R178
1k
C520
0.1u
C164
NC
VDDC
HAK_CL1
CHG+
R354
10k
R355
680
R331
68k
C322
NC
VBG
C525
NC
+3.0V
R512
100k
R507
NC
C110
NC
C114
NC
GND
*R510
NC
*R511
NC
IC602
NC
1
B
2
A
3
GND
5 VCC
4
Y
+3.0V
C602
NC
+3.0V
+5.5V
R603
NC
R364
10k
VBAT
+3.0V
Q351
R115
NC
CHG+
R322
100
R321
140
C306
100u
R702
1k
SA103
NC
2
1
Q702
B
C
E
Q361
IC302
3
IN
2 OUT1
1
ADJ
4 OUT2
D142
30V
A K
Q362
B
C
E
Q171
B
C
E
Q111
B
C
E
D113 A K
D133
D153
NC
A K
A K
D361
NC
A K
D601
NC
Q601
NC
C161
10u
C341
1000u
6.3
C502
10u
C503
10u
C50510u
C511
10u
Q701
B
E
C
D362
A
K
C701
1000p
C178
0.022u
IC351
2.7V
2
VIN
1
VOUT
3
NC
4
VSS
R351
3.9k
R352
56k
C352
NC
+5.5V
R365
47k
Q363
R366
10k
C343
10p
R373
1.8k
R371
1
R372
1
Q142
B
C
E
IC611
64K EEPROM
1 A0
2 A1
6
SCL
7
WP
3 A2
8
VCC
4 VSS
5
SDA
*IC601
16M FLASH
1 *CS
2 DO/IO1
6
CLK
7
*HOLD/IO3
3 *WP/IO2
8
VCC
4 GND
5
DI/IO0
R332
33k
Q161
B
C
E
SA101
270V
2
1
*IC501
1
GPIO[20]
2
GPIO[21]
23
MIP
3
GPIO[22]
4
GPIO[23]
5
GPIO[24]
6
GPIO[25]
7
GPIO[26]
8
VDDC2
24
HSMIN
25
HSMIP
26
MPWR
27
HSSPOUTP
28
LOUT
29
SPOUTN
30
VCCPA
81
GPIO[13]
82
GPIO[14]
83
GPIO[15]
84
GPIO[16]
85
GPIO[17]
86
VDDIO2
87
GPIO[18]
88
GPIO[19]
89
GND
9
COREOUT
VBAT
11
DOUBCAPN1
12
DOUBCAPN
13
DOUBCAPP
14
DOUBCAPP1
15
DOUBOUT
16
DCIN0/LIN0
17
DCIN1
18
DCIN2
19
DCIN3/LIN1
20
VREF
21
VCCA
22
MIN
31
SPOUTP
32
PWM1
33
PWM0
34
DCINS
35
XOUT
36
XIN
37
VBAT_APU
38
VDD_APU
39
VCC_IF
40
VDD_IF
41
VCC_FE
42
ANT
43
TRSW_n
44
TXn
67
GPIO[0]/SCL_IIC
68
GPIO[1]/SDA_IIC
69
GPIO[2]
70
GPIO[3]
71
GPIO[4]
72
GPIO[5]
73
GPIO[6]
74
GPIO[7]
75
GPIO[8]
76
VDDIO1
77
GPIO[9]
78
GPIO[10]
79
GPIO[11]
80
GPIO[12]
RA651
100
1
2
3
4
5 6 7 8
RA652
100
1
2
3
4
5 6 7 8
R162
47k
C344
220u
C345
220u
R602
NC
R363
2.2k
R362
68
R361
68
REFERENCE
7XX : FOR DK/BT
3XX : POWER, CHARGE
5XX : BBIC
6XX : FLASH, EEPROM, KEY, LCD
(YELLOW)
(GREEN)
4XX : MIC, SP
1XX : TEL LINE
8XX : RF
MODEL
!
10
KX-TG6641/6643/6644/6645 SCHEMATIC DIAGRAM (Base Unit_Main)
NC: No Components
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10)
(11)
(12)
(13)
1.2V
Rx
Tx
Caller ID
Bell
Battery power supply from
Handset in power outage.