le79555 Zarlink Semiconductor, le79555 Datasheet - Page 9

• Manufacturer Part Number: le79555
• Description: Subscriber Line Interface Circuit
• Manufacturer: Zarlink Semiconductor

Insertion Loss and Balance Return Signal
(
Line Characteristics
Power Supply Rejection Ratio
See
Figure 4
Gain accuracy, 4- to 2-wire
Gain accuracy
2- to 4-wire, 4- to 4-wire
Gain accuracy, 4- to 2-wire
Gain accuracy, 2- to 4-wire, 4- to 4-wire
Gain accuracy over frequency
Gain tracking
Gain tracking On hook
I
I
I
I
K
V
I
I
V
V
V
Effective internal resistance
L
L
L
L
A
B
AB
DC
A
CC
BAT
, Short Loops, Active state
, Long Loops, Active state
, Standby state
LIM
, Leakage, Tip Open state
, Current, Tip Open state
, Active state
, Open Circuit voltage
, ACTIVE STATE
(V
, ACTIVE STATE
and
DC
Scaling)
Figure 5
Description
Description
Description
.)
0 dBm, 1 kHz
0 dBm, 1 kHz
0 dBm, 1 kHz
0 dBm, 1 kHz
On hook
On hook
300 to 3.4 kHz
relative to 1 kHz
300 to 3.4 kHz
relative to 1 kHz
+3 dBm to –55 dBm
relative to 0 dBm
+3 dBm to –55 dBm
relative to 0 dBm
0 dBm to –37 dBm
+3 dBm to 0 dBm
R
R
R
Active, A and B to ground
R
Active state
R
B to GND
RA to BAT = 7 kΩ,
RB to GND = 100 Ω
50 Hz to 3.4 kHz
(V
50 Hz to 3.4 kHz
Off-hook constant current region
(V
CAS pin to V
K DC
L
L
L
L
L
RIPPLE
RIPPLE
Test Conditions (See Note 1)
Test Conditions (See Note 1)
Test Conditions (See Note 1)
Zarlink Semiconductor Inc.
= 2010 Ω
= 600 Ω (current limit)
= 300 to 1500 Ω
= 0
= 2010 Ω
=
V DC
-----------
V AB
= 100 MV RMS)
= 500 MV PP)
BAT
9
T
A
−40º to +85 ºC
−40º to +85 ºC
−40º to +85 ºC
−40º to +85 ºC
= 25 ºC
0º to +70 ºC
0º to +70 ºC
0º to +70 ºC
0º to +70 ºC
–0.35
–6.37
–0.35
42.75
–0.10
–0.15
–6.12
–6.17
–0.10
–0.15
–0.10
–0.15
–0.15
0.052
22.5
–7.5
Min
Min
Min
20
15
18
15
30
28
85
–6.02
–6.02
0.055
24.5
22.5
Typ
Typ
Typ
170
30
75
44
30
–5
40
50
0
+0.10
+0.15
+0.35
+0.10
+0.15
+0.10
+0.15
+0.15
+0.35
–5.92
–5.87
–5.67
0.058
Max
Max
26.5
Max
120
100
255
56
Unit
Unit
Unit
mA
mA
dB
µA
dB
kΩ
V
V
Note
Note
Note
3, 4
3, 4
3, 4
3, 4
3, 4
3,4
3,4
3
3
3
4
5
4