am79r251 Advanced Micro Devices, am79r251 Datasheet - Page 13

• Manufacturer Part Number: am79r251
• Description: Intelligent Subscriber Line Interface Circuit Islic
• Manufacturer: Advanced Micro Devices

LINECARD PARTS LIST
Notes:
1. Value can be adjusted to suit application.
2. Can be looser for relaxed ring-trip requirements.
3. Required for metering > 2.2 Vrms, otherwise may be omitted.
U1
U2
U3, U4
U5, U6
D1, D2
DHi, DLi, DT1i, DT2i
RFAi, RFBi
RSAi, RSBi
RTi
RRXi
RREF
RMGLi, RMGPi
RSHB, RSLB
RHLai
RHLbi
RHLci
RHLdi
CHLbi
CHLdi
RMTi
RLGi
RTESTMi
RTESTLi
CADi, CBDi
CBATHi, CBATLi,
CBATPi
CHPi
CS1i, CS2i
CSSi
Components for External Ringing
RGFDi
RSRBi, RSRc
KRi
3
Item
1
1
The following list defines the parts and part values required to meet target specification limits for
channel i of the linecard (i = 1,2,3,4).
Resistor
Resistor
Resistor
Resistor
Am79R251
Am79X22xx
P1001SC
Diode
Diode
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Capacitor
Capacitor
Resistor
Resistor
Resistor
Resistor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Resistor
Relay
Type
—
1 A
100 mA
50
200 k
80.6 k
100 k
69.8 k
1 k
750 k
40.2 k
4.32 k
2.87 k
2.87 k
3.3 nF
0.82 F
3.01 k
6.04 k
2 k
2 k
22 nF
100 nF
22 nF
100 nF
56 pF
510
750 k
5 V Coil
Value
Am79R251
10 %
10 %
Tol.
10%
20%
20%
20%
2%
2%
1%
1%
1%
5%
1%
1%
1%
1%
1%
1%
1%
1%
1%
5%
2%
2%
100 V
100 V
100 V
2 W
1/4 W
1/8 W
1/8 W
1/8 W
1 W
1/8 W
1/10 W
1/10 W
1/10 W
1/10 W
10 V
10 V
1/8 W
1/8 W
1 W
1 W
100 V
100 V
100 V
100 V
100 V
2 W
1/4 W
Rating
—
ISLIC device
ISLAC device
TECCOR Battrax protector
TECCOR
50 ns
Fusible PTC protection resistors
Sense resistors
Current reference
Thermal management resistors
Not Polarized
Ceramic
Metallic test
Longitudinal test
Ceramic, not voltage sensitive
Ceramic
Ceramic
Protector speed up capacitor
Ceramic
1.2 W typ
Matched to within 0.2% for initial tolerance
and 0 to 70
17 mW typ
DPDT
°
C ambient temperature range.
Comments
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