le5712 Zarlink Semiconductor, le5712 Datasheet - Page 20

• Manufacturer Part Number: le5712
• Description: Dual Subscriber Line Interface Circuit
• Manufacturer: Zarlink Semiconductor

PULSE METERING APPLICATION CIRCUIT (POTS WITH METERING)
For use with a Quad or Octal SLAC device; earth-backed ringing.
RING_SOURCE
75 Vrms, 25 Hz
RING
RING
DAC
TIP
BAT
BAT
TIP
BAT
RS
RF
DB
DB
RS
RF
1
1
1
2
2
2
1
2
1
2
BAT
R
R
C
C
FR1
FR2
S1
S2
R
R
FA1
FA2
D
RR1
RR2
VBH
R
R
R
R
R
R2
SR3
SR4
FB1
FB2
Protector
Proector
RR1
RR2
C
BAT
C
RT2
C
C
AD1
AD2
C
C
BD1
R
R
BD2
TMG1
TMG2
C
CAS
C
C
R
R
HP1
HP1
HP2
HP2
R
R
R
SR2
R1
SR1
AD
HP
BD
TMG
VBAT
TMG
VBREF
CAS
DB
DAC
DB
AD
HP
BD
BGND
Zarlink Semiconductor Inc.
2
2
1
1
1
1
2
2
1
2
C
1
RT1
BGND
Le5712x
20
2
CH1
+ 5 V
U1
VCC
V
CC
CH2
C
VCC
VCC
ANALOG
GROUND
R
R
RTH2
RTH1
/DGND
AGND
C
CDC
CDC
TH
RSN
RSN
DET
DET
VTX
VTX
BATTERY
GROUND
IREF
FLT
FLT
C1
C2
C3
C1
C2
C3
RD
1
1
1
1
1
1
1
1
2
2
2
2
2
2
2
2
DAC
RS
DB
RS
DB
RF
RF
1
2
1
1
2
2
R
R
R
R
TA1
TB1
TA2
TB2
C
C
DC2
DC1
R
C
C
D
T1
T2
DIGITAL
GROUND
R
R
M1
M2
R
C
R
C
P1
P1
P2
P2
R
REF
C
C
R
R
R
R
M1
M2
RX1
RX2
X1
X2
C
C
C
C
X1
X2
DET1
DET2
C
C
C
C
VRX1
VTX1
VRX2
VTX2
022503
VOUT
VOUT
CD1
CD2
CD1
CD2
VIN
VIN
V
C3
C4
C5
V
C3
C4
C5
M1
M2
1
1
1
2
2
2
1
2
1
1
2
2
1
2