le5711 Zarlink Semiconductor, le5711 Datasheet - Page 10

• Manufacturer Part Number: le5711
• Description: Dual Subscriber Line Interface Circuit
• Manufacturer: Zarlink Semiconductor

User-Programmable Components
Note:
* "i" denotes channel number
C
Thermal Management Equations (Active, and Reverse Polarity states for one channel)
R
C
I
P
P
R
Z
Z
STANDBY
CAS
RTMG
SLIC
DC
TMG
REF
Ti
RXi
=
=
=
=
=
≥
=
166.7 Z
------------ - •
G
---------------
I
1.5 µF
------------------------------------------ -
170 kΩ 2π f
---------------------------------------------------------------------------------------------------- - 40 Ω
=
LOOP
V
Z
450
42L
=
V
L
BATMAX
(
------------------------------------------------------------------------------------------- - R
BAT
V
---------------------------------
3200 Ω
(
V
BAT
BAT
2WIN
1
•
•
-------------------------------------------------------- -
Z
I
–
L
T
– V I
–
(
6
6 V
–
+
+
–
•
R
3 V
P
2R
166.7 Z
R
TMG
c
RTMG
L
–
I
–
500Z
LMIN
F
[
)
LMIN
Equation
I
+
L
(
40 Ω
• R
–
T
L
(
R
(
+
2R
L
L
2R
( )
)
I
2
F
+
L
F
+
2R
2
)
R
+
F
LMIN
Zarlink Semiconductor Inc.
0.12 W
)
]
)
2
)
•
–
TMG
10
Z
fuse resistors are R
input impedance. When computing Z
current amplifier pole and any external stray capacitance
between VTX and RSN must be taken into account.
Z
above, and G
I
region.
Loop detect threshold is typically 1/3 of programmed
Loop current.
C
filter cut-off frequency.
Standby loop current (resistive region).
R
within the SLIC device in Active and Off-Hook states.
Power dissipated in the TMG resistor, R
Active and Off-Hook states.
Power dissipated per channel in the SLIC device while in
Active state.
LOOP
Ti
RXi
CAS
TMG
* is connected between the VTX and RSN pins. The
* is connected from VRX to RSN. Z
is the regulator filter capacitor and f
is connected from TMG to VBAT and limits power
is the desired loop current in the constant-current
42L
is the desired receive gain.
F
, and Z
Description
2WIN
is the desired 2-wire AC
Ti
, the internal
Ti
TMG
c
is defined
is the desired
, during