SI3232-BQ Silicon Laboratories Inc, SI3232-BQ Datasheet - Page 23

• Manufacturer Part Number: SI3232-BQ
• Description: IC SLIC PROG DUAL-CH 64TQFP
• Manufacturer: Silicon Laboratories Inc

Specifications of SI3232-BQ

• Package / Case: *
• Function: Subscriber Line Interface Concept (SLIC)
• Interface: ISDN
• Number Of Circuits: 2
• Voltage - Supply: 3.13 V ~ 3.47 V
• Current - Supply: 28mA
• Power (watts): 280mW
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Product: SLIC
• Supply Voltage (min): 3.13 V
• Supply Current: 28 mA
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Number Of Channels: 2
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

The dc linefeed circuitry generates the necessary TIP/
RING I/V characteristics along with loop closure and
ring trip detection. For loop start applications, V
V
software-programmable with a range from 18–45 mA.
Figure 8. V
Parameter
Linefeed
Linefeed Shadow
Battery Feed Control
Loop Current Limit
On-Hook Line Voltage
Common Mode Voltage
V
V
V
Overhead Voltage
Ringing Overhead Voltage
V
RING
OC
OC
OC
OC
Delta for Off-Hook
Delta Threshold, Low
Delta Threshold, High
During Battery Tracking
is programmable. The loop current limit, I
60
50
40
30
20
10
0
TIP–RING
V
OC
Loop Start Operation
R
O
Table 13. Register and RAM Locations used for Linefeed Control
= 600 Ω
10
vs. I
I
LOOP
20
I
LOOP
LIM
VOCTRACK
(mA)
VOCDELTA
Mnemonic
LINEFEED
LINEFEED
Register /
VOVRING
VOCHTH
RLYCON
VOCLTH
R
30
Characteristic for
O
RAM
VOC
VCM
VOV
ILIM
I
Loop Closure
LIM
= 320 Ω
Threshold
40
= 24 mA
Preliminary Rev. 0.95
50
Register/RAM Bits
VOCTRACK[15:0]
VOCDELTA[14:0]
VOVRING[14:0]
LIM
VOCTHD[15:0]
VOCTHD[15:0]
TIP
VCM[14:0]
VOC[14:0]
VOV[14:0]
, is
ILIM[4:0]
LFS[2:0]
BATSEL
LF[2:0]
–
Figure 8 illustrates the linefeed characteristics for a
typical application using an I
a TIP-RING open circuit voltage (V
VOC and VOCTRACK RAM locations are used to
program the TIP-RING voltage, and these two values
are equal provided that V
the battery voltage drops below that point, VOCTRACK
decreases at the same rate as V
sufficient headroom to accommodate both V
Figure 9. V
–20
–40
–60
0
Programmable
VBATH/VBATL
See Table 12
Monitor only
R
Ground Start Operation
0 to 63.3 V
0 to 63.3 V
0 to 63.3 V
0 to 63.3 V
0 to 63.3 V
0 to 63.3 V
0 to 63.3 V
0 to 63.3 V
18–45 mA
O
RING
Range
= 600 Ω
10
vs. I
I
RING
BAT
RING
20
(mA)
LOOP
> V
R
LSB Size
0.875 mV
4.907 mV
4.907 mV
4.907 mV
4.907 mV
4.907 mV
4.907 mV
4.907 mV
4.907 mV
O
Characteristic for
OC
BAT
N/A
N/A
N/A
= 320 Ω
Loop Closure
setting of 24 mA and
30
+ V
Threshold
I
in order to provide
OC
LIM
OV
Si3232
) of 48 V. The
= 24 mA
+ V
Resolution
OV
40
Effective
0.875 mA
1.005 V
1.005 V
1.005 V
1.005 V
1.005 V
1.005 V
1.005 V
1.005 V
CM
N/A
N/A
N/A
and V
. When
50
CM
23