CPC5622 Datasheet, PDF (8/18 Pages) Clare, Inc. – LITELINK® III Phone Line Interface IC (DAA)

CPC5622
2.2 Reactive Termination Application Circuit
Figure 4. Reactive Termination Application Circuit Schematic
3.3 or 5V
R23 ²
10
C1
1μ
C16
10μ
A
FB1
600 Ω
200 mA A
R1
(R_TX)
80.6K
1 _VDD
U1
C9
0.1μ
LITELINK ^{REFL 32}
2 _TXSM
BR-
TXF ³¹
TX-
TX+
OH
RING
RING2
RX-
RX+
C13 0.1μ _{3 TX-}
C2 0.1μ _{4 TX+}
5 _TX
6 MODE
A
7 _GND
8 OH
9 _RING
10 _RING2
C14 0.1μ _{11 RX-}
C4 0.1μ _{12 RX+}
13 _SNP+
14 _SNP-
15 _RXF
16 _RX
R2
(R_RXF)
130K
ZTX ³⁰
ZNT ²⁹
TXSL ²⁸
BR- ²⁷
NTS ²⁶
GAT ²⁵
NTF ²⁴
DCS1 ²³
DCS2 ²²
ZDC ²¹
BR- ²⁰
R5
(R_TXF)
60.4K
BR-
R75
(R_NTX)
110K
C10
0.01μ
500V
R13
(R_NTS)
1M
R22
(R_DCS1A)
6.49M
R12
(R_NTF)
221K
R15
(R_DCS2)
1.69M
C21
100p
BR- (C_GAT)
R21
(R_DCS1B)
6.49M
C12
(C_DCS)
0.027μ
BR-
R16
8.2
(R_ZDC)
3
RPB ¹⁹
18
RXS
2R0706K(R^HTF)
BR-
R8 (R_HTX)
VDDL ¹⁷
200K
R4
(R_PB)
68.1 _C20
BR-
(C_ZNT)
0.68μ
R10
59 (RZNT1)
R18
(R_ZTX)
10K
BR-
R11
169 ^(RZNT2⁾
R14
(R_GAT)
47
5%
BR-
Q1
CPC5602C
R20
(R_VDDL)
2
5%
C15
0.01μ
500V
BR-
+ _DB1
-
BR-
C7
(C_SNP-) ⁴
220p
R3
(R_SNPD)
1.5M
C8
(C_SNP+) ⁴
220p
R6
(R_SNP-2)
1.8M
R7
(R_SNP+2)
1.8M
R44
(R_SNP-1)
1.8M
R45
(R_SNP+1)
1.8M
¹This design was tested and found to comply with FCC Part 68 with this
Sidactor. 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
application note AN-146, Guidelines for Effective LITELINK Designs for
more information.
3_{RZDC sets the loop-current limit, see “Setting a Current Limit” on}
page 13. Also see Clare application note AN-146 for heat sinking
recommendations for the CPC5602C FET.
4_{Use voltage ratings based on the isolation requirements of your application.}
NOTE: Unless otherwise noted:
Resistor values are in Ohms
All resistors are 1%.
Capacitor values are in Farads.
TIP
SP1 ¹
RING
8
www.clare.com
R02