ELECTRICAL CHARACTERISTICS (continued)
Description
Idle Channel Noise (2-Wire and 4-Wire)
C-message weighted
2-wire,
4-wire,
Psophometric weighted
2-wire,
4-wire,
Line Characteristics, Active State (See Figure 1)
Short loops, Active state
Long loops, Active state
OHT state
Standby state
BAT = –48 V, R
LDC
= 600
Ω
BAT = –48 V, R
LDC
= 1.9 kΩ
BAT = –48 V, R
LDC
= 600
Ω
24.7
17.5
15.5
0.7I
L
15.0
I
L
17.4
100
µA
100
21
20
30
30
100
–7.5
40.5
–5.0
V
42.0
44
45
130
mA
20.5
mA
T
A
= 25
°
C
1.3I
L
29.3
0
°
C to +70
°
C
–40
°
C to +85
°
C
0
°
C to +70
°
C
–40
°
C to +85
°
C
0
°
C to +70
°
C
–40
°
C to +85
°
C
0
°
C to +70
°
C
–40
°
C to +85
°
C
+7
+7
+7
+7
–83
–83
–83
–83
+10
+12
dBrnc
+10
+12
–78
dBmp
–75
4
4
4
Test Conditions (See Note 1)
Min
Typ
Max
Unit
Note
V
BAT
– 3 V
-
I
L
=
------------------------------
R
L
+ 1800
R
L
= 600
Ω,
BAT = –48 V
T
A
= 70
°C
Loop current
Tip Open state, R
L
= 0
Ω
Disconnect state, R
L
= 0
Ω
Tip Open state, Bwire to GND
Tip Open state, Bwire = BAT + 6 V
I
L
LIM (I
TIP
+ I
RING
)
Ground-start signaling (tip voltage)
Open circuit voltage
Power Dissipation, BAT = –48 V
On hook, Open Circuit state
On hook, OHT state
On hook, Active state
On hook, Standby state
Off hook, OHT state
Off hook, Active state
Off hook, Standby state
Tip and ring shorted to GND
Active state, R
TIP
to –48 V = 7.0 kΩ
R
RING
to GND = 100 kΩ
Active and OHT state, BAT = –48 V
25
120
R
TMG
= Open
R
TMG
= 1700
Ω
160
195
35
R
L
= 300
Ω,
R
TMG
=
∞,
BAT = –48 V
R
L
= 300
Ω,
R
TMG
=
∞,
BAT = –48 V
R
L
= 300
Ω,
R
TMG
=
∞
R
L
= 600
Ω,
T
A
= 25
°C
735
1.25
0.57
0.68
100
210
230
280
100
1100
1.60
0.85
1.0
mW
W
SLIC Products
7
AMD [ ADVANCED MICRO DEVICES ]
