am79d2251 Advanced Micro Devices, am79d2251 Datasheet - Page 12

• Manufacturer Part Number: am79d2251
• Description: Dual Intelligent Subscriber Line Audio-processing Circuit Islac
• Manufacturer: Advanced Micro Devices

12
KRi
Ring Bus
B
(B)
A
RGFDLi
RTESTMi
DT1i
DT2i
RSBi
RSAi
RFAi
***
RFBi
BATH
BATH
BATL
RTESTLi
CBATHi
6
7
2
KRi(A)
CS
DHi
KRi
DLi
U5
1
4
+5 V
RMGPi
RMGLi
Figure 5. External Ringing Linecard Schematic
CBATLi
5
8
CHPi
CADi
CBDi
CSSi
*** DT2i is optional - Should be put if there is a chance that
this chip may be replaced by Am79R251.
* CSS required for > 2.2 Vrms metering
** Connections shown for one channel
TMN
BGND
HPA
HPB
TMP
VBH
RYE
R2H
R3H
VBL
RSVD2
TMS
SA
AD
BD
SB
R1
+5 V
VCC
Am79231
U1
Am79D2251
CREF
RSRBi
3.3 V
RSRC
RSVD
VSAB
VREF
GND
RSN
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
ISLAC
U2
DGND
AGND
VCCD
VCCA
SPB
IREF
SHB
SLB
XSC
PLANE
RSHB
RSLB
BACK
RREF
BATH
VCC
+3.3 VDC
BATL