CPC5620 Datasheet, PDF (8/18 Pages) Clare, Inc. – LITELINK III Phone Line Interface IC (DAA)

CPC5620/CPC5621
2.2 Reactive Termination Application Circuit
Figure 4. Reactive Termination Application Circuit Schematic
3.3 or 5 V
R23²
10
C1
1
C9
C16
FB1
0.1
10
600 Ω
200 mA ^A
A
1
R1 (R_TX) 80.6K 1% ₂
y TX-
C13 0.1 3
TX+
C2 0.1 4
5
r ₆
7
a ^OH
RING
CID
RX-
in ^RX+
8
9
10
C14 0.1 11
12
C4 0.1
13
14
15
16
VDD
TXSM
TX-
TX+
TX
MODE
GND
OH
RING
CID
RX-
RX+
SNP+
SNP-
RXF
RX
U1
LITELINK
REFL ³²
TXF ³¹
ZTX ³⁰
ZNT ²⁹
TXSL ²⁸
BR- ²⁷
NTS ²⁶
GAT ²⁵
NTF ²⁴
DCS1 ²³
DCS2 ²²
ZDC ²¹
BR- ²⁰
RPB ¹⁹
RXS ¹⁸
VDDL ¹⁷
BR-
R5 (R_TXF)
60.4K
1%
R75 (R_NTX)
110K 1%
C10
0.01
500V
R13
(R_NTS)
1M
1%
R12 (R_NTF)
221K 1%
R15 (R_DCS2)
1.69M 1%
R16 (R_ZDC) 22.1 1%
R76 (R_HNTF)
200K 1%
R2
lim ^(RRXF)
130K
A
1%
R4
(R_PB)
68.1
1%
BR-
R8 (R_HTX)
200K 1%
R10
(R_ZNT1)
59
e_1%
r^C20
(C_ZNT)
P^0.68
R11
(R_ZNT2)
169
1%
Q1
CPC5602C
R14
(R_GAT)
47
C21 (C_GAT) 100 pF
C15
0.01
500V
BR-
R20
(R_VDDL)
BR-
2
R18
(R_ZTX)
10K
1%
BR-
+ DB1
-
BR-
R22 (R_DCS1A)
6.8 M 1%
R21 (R_DCS1B)
6.2 M 1%
C12 (C_DCS)
0.027
BR-
SP1¹
1
2
TIP
RING
NOTE: Unless otherwise
noted, all resistors are in
Ohms, 5%. All capacitors
are in microFarads.
BR-
C7
(C_SNP-)
220pF
2000V
R3
(R_SNPD)
1.5M
1%
R6 (R_SNP-2)
1.8M 1/10W 1%
R44 (R_SNP-1)
1.8M 1/10W 1%
C8
R7 (R_SNP+2)
(C_SNP+) 1.8M 1/10W 1%
220pF
2000V
R45 (R_SNP+1)
1.8M 1/10W 1%
¹This design was tested and found to comply with FCC Part 68 with this part.
Other compliance requirements may require a different part.
²Higher-noise power supplies may require substitution of a 220 µH inductor,
Toko 380HB-2215 or similar. See the Power Quality section of Clare appli-
cation note AN-146, Guidelines for Effective LITELINK Designs for more
information.
8
www.clare.com
Rev. 0.E