le79231 Zarlink Semiconductor, le79231 Datasheet - Page 19

• Manufacturer Part Number: le79231
• Description: Intelligent Subscriber Line Interface Circuit
• Manufacturer: Zarlink Semiconductor

APPLICATION CIRCUIT
External Ringing Line card Schematic
KRi
Ring Bus
B
(B)
A
RGFD
i
RTESTMi
BATH
BATL
DT1i
DT2i
RSBi
RSAi
RFAi
***
RFBi
BATH
RTESTLi
6
7
2
RMGLi
KRi(A)
CS
KRi
U5
1
4
+5 V
RMGPi
CBATHi
CBATLi
5
8
CHPi
CADi
CBDi
**DT2i is optional - Should be put if Le79R251 is used.
*Connections shown for one channel
TMN
BGND
HPA
HPB
TMP
VBH
RYE
R2H
R3H
VBL
RSVD2
SA
AD
BD
SB
TMS
R1
+5 V
VCC
Zarlink Semiconductor Inc.
Le79R241
Le79R251
Le79231,
U1
or
CREF
RSRBi
3.3 V
RSRC
RSVD
19
VSAB
VREF
GND
RSN
VBP
VTX
VLB
IMT
ILG
LD
P1
P2
P3
RMTi
RLGi
VREF
VREF
CHLbi
RTi
RHLci
RHLai
RRXi
VREF
RHLbi
RHLdi
CHLdi
VOUTi
VHLi
VSABi
VINi
VLBi
VIMTi
VILGi
VREF
LDi
P1
P2
P3
XSBi
Le79Q224x
or Le5822x
ISLAC
codec
U2
U2
DGND
AGND
VCCD
VCCA
SPB
IREF
SHB
SLB
XSC
PLANE
RSHB
RSLB
BACK
RREF
BATH
BATL
VCC
+3.3 VDC