36
TK-290-11B
SCHEMATIC DIAGRAM
K
L
M
N
O
X57-613 3/6
MOD
C601
0.47u25
R609
150k
R608
10k
C603
0.068u
C604
0.01u
R621
10k
R611
180k
C610
0.01u
IC605
TC75W51FUF
1
oUTA
2
IN-A
3
IN+A
4
VSS
5
IN+B
6
IN-B
7
oUTB
8
VDD
C606
2200p
IC601
TC75W51FUF
1
oUTA
2
IN-A
3
IN+A
4
VSS
5
IN+B
6
IN-B
7
oUTB
8
VDD
C681
0.01u
R617
0
R603
0
R601
15k
R679
0
R668
330k
R618
68k
R626
100k
C602
0.1u
IC604
TC75W51FUF
1
oUTA
2
IN-A
3
IN+A
4
VSS
5
IN+B
6
IN-B
7
oUTB
8
VDD
R606
0
C668
1000p
R615
10k
R612
330k
IC603
M62364FP-F
1
VIN1
2
VOUT1
3
VOUT2
4
VIN2
5
VDD
6
LD
7
CLK
8
DI
9
VIN3
10
VOUT3
11
VOUT4
12
VIN4
13
VIN5
14
VOUT5
15
VOUT6
16
VIN6
17
DO
18
VDAref
19
RESET
20
GND
21
VIN7
22
VOUT7
23
VOUT8
24
VIN8
C600
0.047u
IC600
LC73872M
1 INPUT
2 NC1
3 PD
4 OSCO
5 OSCI
6 NC2
7 VSS
8
LOAD
9
SD
10
ACK
11
STD
12
EST
13
NC3
14
VDD
C665
0.033u
R622
22k
C612
4.7u6.3
C619
330p
(J)
R614
180k
C609
120p
R605
0
C613
0.01u
R607
15k
R669
0
R610
56k
R602
22k
C611
0.012u
R623
330k
C661
0.1u
IC602
TA75W01FUF
1
oUT1
2
IN1-
3
IN1+
4
VEE
5
IN2+
6
IN2-
7
oUT-B
8
VCC
C607
100p
R677
33k
C660
10u6.3
C659
0.1u
C669
100p
(J)
C679
0.1u
R629
22k
R635
39k
R624
33k
R628
330k
R619
100
PD
SD
LD
STD
DCK
DAT
CLK
DI
LSDIN
DSQ
AF
ETS1
ETS2
T/R
5T
5M
RXIN
5R
5C
5T
5M
RXIN
5C
5R
TONE
ETS2
T/R
ETS1
MOD
DTMF
DECODER
BUFFER
AMPLIFIER
ACTIVE
FILTER
D/A CONVERTOR
SUMMING
AMPLIFIER/
BUFFER
AMPLIFIER
ACTIVE
FILTER/
SUMMING
AMPLIFIER
TONE
DET
RXOUT
RXOUT
MIC
MIC
AUDIH
AUDIH
2.0V
5.0V
TX-RX UNIT (X57-6132-70)