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AM79R251JC Datasheet(PDF) 17 Page - Advanced Micro Devices

Part # AM79R251JC
Description  Intelligent Subscriber Line Interface Circuit (ISLIC)
PDF  27 Pages
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Manufacturer  AMD [Advanced Micro Devices]
Direct Link  http://www.amd.com
Logo AMD - Advanced Micro Devices

AM79R251JC Datasheet(HTML) 17 Page - Advanced Micro Devices

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Am79R251
17
SPECIFICATIONS
Target Specifications (See note 1)
No.
Item
Condition
Min
Typ
Max
Unit
Note
1
Two-wire loop voltage
(including offset)
Standby mode, open circuit,
|VBH| < 55 V
|VBH| > 55 V
Any Active mode (does not
include OHT), RL = 600
Ω,
IRSN = 50 µA
OHT mode, RL = 600
Ω,
IRSN = 36 µA
VBH – ?
13.88
8.64
VBH–5
50
15
10.8
VBH–?
16.13
12.96
V3
2
Feed resistance per leg at
pins AD & BD
Standby mode
130
250
375
Ω
3
Feed current limit
Feed current
Standby mode, RL = 600
Ω
30
mA
IMT current
Standby mode, RL = 1930
Ω
44.6
56
µA
ILG current
Standby mode
A to VBH
B to Ground
36
43
4
Ternary input voltage
boundaries for LD pin.
Mid-level input source
must be Vref.
Low boundary
High boundary
Input high current
Input low current
Mid-level current
CREF – 1
TBD
TBD
TBD
0.6
V
V
µA
µA
V
—
—
—
—
3
5
Logic Inputs P1, P2, P3
Input high voltage
Input low voltage
Input high current
Input low current
2.0
10
50
0.8
V
V
µA
µA
6
VTX output offset
–50
+50
mV
7
VREF input current
VREF = 1.4 V
TBD
mA
3
8
CREF input current
CREF = 3.3 V
TBD
mA
3
9
β, DC Ratio of VAB to loop
voltage:
Tj < 145°C, VSA – VSB = 22 V
0.00667
V/V
10
Fault Indicator Threshold
Voltage Output on IMT
TBD
CREF -
0.3 V
CREF
V
3
11
Gain from VLB pin to A or
B pin
45
V/V
12
VLB pin input current
VLB = VREF
±1V
TBD
mA
13
ILOOP/IMT
ILOOP = 10 mA
300
A/A
14
ILONG/ILG
ILONG = 10 mA
600
A/A
15
Input current, SA and SB
pins
Active modes
1.0
3.0
µA
3
16
K1
Incremental DC current gain
500
A/A
17
ISA/IMT
Disconnect, ISA = 2 mA
6
18
ISB/ILG
Disconnect, ISB = 2 mA
12
β
V
SAB
V
SA
V
SB
–
--------------------------
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