SI3203-B-FM Silicon Laboratories Inc, SI3203-B-FM Datasheet - Page 26

• Manufacturer Part Number: SI3203-B-FM
• Description: IC PROSLIC LINE FEED 100V 40QFN
• Manufacturer: Silicon Laboratories Inc
• Series: ProSLIC®r

Specifications of SI3203-B-FM

• On-hook Transmission: Yes
• Polarity Reversal: Yes
• On-chip Ring Relay Driver: No
• Longitudinal Balanced: 60
• Operating Supply Voltage (typ): 3.3V
• Operating Temp Range: 0C to 70C
• Package Type: TQFP
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Function: Subscriber Line Interface Concept (SLIC)
• Interface: GCI, PCM, SPI
• Number Of Circuits: 4
• Voltage - Supply: 3.3V
• Current - Supply: *
• Power (watts): *
• Operating Temperature: *
• Mounting Type: Surface Mount
• Package / Case: 40-VFQFN Exposed Pad
• Includes: *
• Lead Free Status / RoHS Status: Compliant

Si3208/9
If the Si3226/7 detects a fault condition or overpower
condition on any channel, it automatically sets that
channel to the open state and generates a "power
alarm" interrupt. The interrupt can be masked, but the
automatic transition to open cannot be masked. The
various power alarms and linefeed faults supporting
automatic intervention are described below.
1. LFIC total power exceeded.
2. Power exceeded in one or more transistors of a LFIC
3. Excessive foreign current or voltage on TIP and/or
4. LFIC thermal shutdown event; this event is
4.6. Power Dissipation Considerations
The Dual ProSLIC is designed to source loops up to
20 kft as well as short loop applications. The LFIC
provides all battery sourcing functions and is, therefore,
the determining factor regarding power dissipation in a
specific application. The Dual ProSLIC provides an on-
chip dc-dc controller that can dynamically reduce the
battery supply to ideally match the required line feed
voltage.
26
Line Diagnostics
internal transistor group (if capable of measuring
individual power consumption).
RING.
automatically performed, and no intervention by the
Si3226/7 is required.
Linefeed State
Reverse Active
Forward Active
Reverse OHT
Forward OHT
RING Open
TIP Open
Ringing
Open
Output is high-impedance, and all line supervision functions are powered down. Audio is
powered down. This is the default state after powerup or following a hardware reset. This
state can also be used in the presence of line fault conditions and to generate open switch
intervals (OSIs). This state is used in line diagnostics mode as a high-Z state during line-
feed testing. A power fault condition may also force the device into the open state.
Linefeed circuitry and audio are active. In Forward Active state, the TIP lead is more posi-
tive than the RING lead; in Reverse Active state, the RING lead is more positive than the
TIP lead. Loop closure and ground key detect circuitry are active.
Provides data transmission during an on-hook loop condition (e.g., transmitting caller ID
data between ringing bursts). Linefeed circuitry and audio are active. In Forward OHT
state, the TIP lead is more positive than the RING lead; in Reverse OHT state, the RING
lead is more positive than the TIP lead.
Provides an active linefeed on the RING lead and sets the TIP lead to high impedance
(>400 kΩ) for ground start operation in forward polarity. Loop closure and ground key
detect circuitry are active.
Provides an active linefeed on the TIP lead and sets the RING lead to high impedance
(>400 kΩ) for ground start operation in reverse polarity. Loop closure and ground key
detect circuitry are active.
Drives programmable ringing signal onto TIP and RING leads with or without dc offset.
The channel selected is put into diagnostic mode. In this mode, the selected channel has
special diagnostic resources available.
Table 16. Linefeed Operating States
Preliminary Rev. 0.33
4.5. Thermal Overload Shutdown
If the LFIC die temperature exceeds the maximum
junction temperature threshold, TJmax, of 145 °C or
200 ºC or other programmed temperature threshold
range, the LFIC has the ability to shut itself down to a
low-power state without any assistance from the
Si3226/7. The thermal shutdown circuit contains a
sufficient amount of hysteresis and/or turn-on delay time
so as to remain shut down during a power cross event,
where 50 Hz or 60 Hz, 600 V, is connected to TIP and/
or RING.
4.7. Loop Closure Detection
The Dual ProSLIC provides a completely programmable
loop closure detection mechanism. The loop closure
detection scheme provides two unique thresholds to
allow hysteresis, and also includes a programmable
debounce filter to eliminate false detection. A loop
closure detect status bit provides continuous status, and
a maskable interrupt bit is also provided.
Description