am7945 Advanced Micro Devices, am7945 Datasheet - Page 7

• Manufacturer Part Number: am7945
• Description: Subscriber Line Interface Circuit
• Manufacturer: Advanced Micro Devices

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