AM79D2251JC AMD [Advanced Micro Devices], AM79D2251JC Datasheet - Page 11

• Manufacturer Part Number: AM79D2251JC
• Description: Dual Intelligent Subscriber Line Audio-Processing Circuit (ISLAC)
• Manufacturer: AMD [Advanced Micro Devices]

*** DT2i diode is optional - should be
connected 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
B
A
RTESTMi
DT1i
DT2i
RSBi
RSAi
BATH
RFBi
RFAi
***
BATH
BATL
CS
U3
U4
RTESTLi
CBATHi
DHi
D1
D2
DLi
RMGPi
RMGLi
CBATLi
Figure 4. Internal Ringing Linecard Schematic
CBDi
CADi
CSSi
CHPi
HPA
HPB
TMP
TMN
VBH
RYE
VBL
R1
BGND
TMS
SA
AD
BD
SB
R2
R3
RSVD
+5 V
VCC
Am79R241
U1
RSVD
CREF
Am79D2251
3.3 V
VSAB
VREF
GND
VTX
RSN
VLB
LD
IMT
ILG
P1
P2
P3
RLGi
RMTi
CHLbi
RTi
VREF
RHLci
RRXi
VREF
RHLai
VREF
RHLdi
RHLbi
CHLdi
VIMTi
VILGi
VREF
LDi
P1
P2
P3
VHLi
VINi
VLBi
VOUTi
VSABi
ISLAC
U2
AGND
DGND
VCCD
IREF
VCCA
SHB
SPB
SLB
PLANE
BACK
RSHB
RSLB
RREF
VCC
+3.3VDC
BATH
BATL
11