YTD428_07 Datasheet, PDF (25/28 Pages) YAMAHA CORPORATION – IDSU ISDN DSU for Terminal Equipment

REFERENCE CIRCUIT
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REFERENCE CIRCUIT
The reference circuit using YTD428 is shown as bellow.
1S953 12
YTD428
R(1%)
LO1
1µ
1µ
R(1%)
8.2k
LO2
LI1
A1
UDM1
UDP1 ^2SJ278
TDK
NL322522T-3R3J
A1
2SJ278
LI2
8.2k
8(1%)
8(1%)
RA
100
RB
TA
A2
0.1µ
33k
22µ
0.1µ
1M
LICT
RX
CX1
CX2
100
TB
Varistor 6
A2
10k
NTSEL
FG
I.430 TTL Interface
YTD418 or YTD423
HRD
LRD
HTD
LTD
D
HRD
LRD
HTD
LTD
UDP0
2SK2315
UDM0
2SK2315
A1
A1
0.01µ(10%) 6
1
15(1W)
L2
560(1%)
RXU2
RXU1
560(1%)
SGA
RXS
SGB
SGBP
SGR
RUC
VRB
VRT
5
2
KP15N14
1.8k(1%)
8
1.8k(1%)
7
3
1µ/160V
4
15(1W)
TDK
VRYA15
TRTEPC9.8-0319C
KP4N12
0.0047µ(10%)
0.0022µ(10%)
0.015µ(10%)
0.15µ(10%)
0.33µ(10%)
0.1µ
0.1µ
0.1µ
Line activation
circuit
FG
L1
KP15N14
FG
A1
CLK1536
RESET
Line activation
circuit
10k
10k
10k
10k
10k
10k 11
10k 5
10k 3
10k
CLK1536
RESET
REV
TDP
RDP
ODSEL
TSMPSEL
MULTI
EXID
CLKSEL
ATEO
TEST0,2-9,21,22
TEST1,16-19
TEST10,11,24
TEST28
LPSW
LOOP2A
CLK200
CLK400
CLK4K
CLK192K
CLK256K
SXA
TEST20
AVDD2
AVSS2
AVDD1
Line activation
circuit
1u
A2
1u
AVSS1
POWMON
LOCAL
A1
LPSEL
TSMPAUT
DVDD
ATEI
1u
TEST12 - 15
TEST23, 25-27
DVSS
D
D