Panasonic KX-TG8421EB - Page 85

85
KX-TG8421E/KX-TG8422E/KX-TG8423E/KX-TG8424E/KX-TGA840E
1.8V
3.0V
TX _RF
RX _RF
TX _AF
Bell signal
Caller ID
0.75V
0V
250mVp-p
Loop Current
Charge Current
RX_AF
Bell signal
GND
GND
Q8
1u
C614
GND
+1.8V
GND
GND
GND
GND
56k FR615
GND
GND
GND
SA1
L1
L2
GND GND
J101
GND
GND
+8.0V
K2.2u
C31
GND
4
Fin
1
ADJ/GND
3
Input
2
Output
GND GND
GND
10kR16
GND
GND
GND
GND
NC(3216)
R123
100k
R14
2.7k
R15
D3
4
1
3
2
GND GND
2.2k
R17
GND
K2.2u
*C16
27k
R18
GND
K2.2u
C17
GND
0.1u
C28
100k
R27
K1uC15
GND
TP10
100
R116
4700p
C14
8.2k
R19
100k
R23
+1.8V
NC
C18
GND
GND
GND
GND
GND
NC
C24
NCC57
47k
R24
GND
GND
12
R21
GND
TP9
K0.22u
C23
470k
R28
K0.1u
C56
K0.22u
C141
GND
GND
1u
C22
(1005) NC
C155
1kR33
1k
R35
GND
GND
10p
C136
GND
100k
R10
GND
+1.8V
GND
GND
100k
R8
100n
C72
100n
C61
GND
3.3k
R81
3.3kR117
+1.8V
1nC157
TP16
TP15
NC
*C48
NC
*C156
GND
GND
GND
3.9
R55
GND
GND
100n
C51
GND
GND
GND
100n
C75
NC
*D16
AK
D1
AK
Q4
D23
NC
*D15
AK
+3.0V
2.2u
C84
C306 NC
1u
C305
GND
GND
1k
R130
10k
R129
3AF1
*R2
NC
D21
10kRA402
1
23
4
*Q23
NC
*D5
AK
*D6
AK
D9
AK
1u
C615
Q9
+2.5V
+2.5V
GND
F 140
R39
F 100
R38
220R106
220
R109
NC
C2
GND
C167
NC
VDD2
100n
C7
100n
C8
10pC65
+2.5_CP
C623
NC
L2TL1TL1R
DCM
DCP
L2R
C12 NC
10p
C137
GND
C166
NC
100u16
C32
50 10u
C27
*C49
NC
GND
10.368MX1
13
2
120
R29
NC
D26
ANT1
RF_RXn
RXON
TXON
TXn
TXp
VDD_PADRV
PSEL
PON
ANT2
RF_RXp
GND
C626
NC
10
330u
C36
10k
R657
GND
GND
GND
GND
Q5
Q3
10p*C148
10p*C147
10p
C170
10p
C169
10p
C168
10p
C74
680p
C9
500
680p
C10
500
1k
RA1
1 2 3 45
6 7 8
*C622
NC
D22
LINE_DC
NC
*R126
HAK_CL1
3.9
R56
TEST
VDD3
VDD1
NC
C1
10p
C171
120k
R36
C617
1u 10
5p
C29
5p
C30
C37
5p
1MR4
1MR6
180k
R3
180k
R5
C5
10n
10n
C6
10n
C42
10n
C43
4.7M
R42
4.7M
R43
680pC3
680pC4
33nC54
C55
82n
1k
R37
82kR32
82kR34
820pC52
820pC53
GND
10p
C70
1
VSS_LNA1
2
RF_RXp
21
CIDINp/VREFp
3
RF_RXn
4
VSS_LNA2
5
RFP1
6
RFP0
7
REF_RES
8
AVS_XTAL
22
RINGp/P3_7
23
RINGn/P3_6
24
RINGOUT/RINGING/P3_5
25
PARADET/P3_4
26
ADC0/P3_3
27
ADC1/INT0/P1_0
28
NTC/ADC2
41
CP_C2y
42
CP_VOUT1/LED1
43
CP_VOUT2/LED2
44
PON/P1_6
45
VDD1
46
P2_7/BXTAL
81
GND
9
XTAL2
10
XTAL1
11
AVD_XTAL
12
RF_SUPPLY1
13
LDO_CTRL
14
AVD
15
LSRn
16
LSRp
17
VREFm
18
MICh
19
CIDOUT/MICn
20
CIDINn/MICp
29
SOCp
30
SOCn
31
CHARGE_CTRL
32
P1_7/CHARGE
33
PAOUTp/P3_1
34
VDDPA
35
PAOUTn/P3_0
36
VBAT1
37
CP_C1x
38
CP_C2x
39
CP_C1y
40
VBAT2
47
P1_5/INT5/RDI/VDDE
48
P1_4/INT4/TDOD
49
P1_3/INT3/SIO
50
P1_2/INT2/SK
51
P1_1/INT1/LE
52
P2_6/WTF_IN
53
P0_7/SPI_DI
54
P0_6/SPI_DO
55
P0_5/SPI_CLK
56
P0_4/SPI_EN
57
P0_3/SCL2
58
P0_2/SDA2
59
P0_1/URX
60
P0_0/UTX
61
RSTn
62
JTAG
63
P2_5/PCM_FSC/SF
64
P2_4/SCL1/PCM_DO/DP3
65
P2_3/SDA1/PCM_DI/DP2
66
P2_2/PCM_CLK/CLK100
67
P2_1/ECZ2/PWM1/LED4
68
P2_0/ECZ1/PWM0/LED3
69
VDD2
70
LDORF_CTRL
71
RF_SUPPLY2
72
RFP0n
73
RFP4
76
VSS_PADR1
79
VSS_PADR2
77
RF_TXp
80
RFP2
75
VDD_PADR
78
RF_TXn
74
RFP3
*Q22
NC
*C25
0.01u
5.6M
*R7
5.6M
*R9
*Q2
NC(3216)
*R124
NC
*R12
NC
*R13
390
*R30
1.8k
*R31
1.8k
*R20
27R22
1
A0
2
A1
3
A2
4
VSS
5
SDA
6
SCL
7
WP
8
VCC
CHARGE
SCL2
SDA2
EEP_WP Low_Rad LED2 LED1
EEP_WP
DC_IN
Charge -
Charge +
TO RF BLOCK
IC1
*IC401
*IC7
(1)
(2)
(3)
(4)
(5)
(7)
(6)
(8)
(9)
KX-TG8421/8422/8423/8424E SCHEMATIC DIAGRAM (Base Unit)
NC: No Components