SI3220-KQ Silicon Laboratories Inc, SI3220-KQ Datasheet - Page 29

• Manufacturer Part Number: SI3220-KQ
• Description: IC SLIC/CODEC DUAL-CH 64TQFP
• Manufacturer: Silicon Laboratories Inc
• Series: ProSLIC®r

Specifications of SI3220-KQ

• Package / Case: *
• Function: Subscriber Line Interface Concept (SLIC), CODEC
• Interface: GCI, PCM, SPI
• Number Of Circuits: 2
• Voltage - Supply: 3.3V, 5V
• Current - Supply: 65mA
• Power (watts): 941mW
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Includes: Battery Switching, BORSCHT Functions, DTMF Generation and Decoding, FSK Tone Generation, Modem and Fax Tone Detection
• Product: Telecom
• Supply Voltage (min): 3.13 V
• Supply Current: 22 mA
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Mounting Style: SMD/SMT
• Number Of Channels: 2
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Linefeed Operation States
The linefeed interface includes eight different operating
states. (See Table 17.) The linefeed register settings
(LF[2:0], Linefeed register) are also listed. The Open
state is the default condition in the absence of any pre-
loaded register settings. The
automatically enter the Open state if excess power
consumption is detected in the Si3200. See "Power
Monitoring and Power Fault Detection" on page 33 for
Open (LF[2:0] = 000).
The Si3200 output is high-impedance. This mode can be used in the presence of line fault conditions and to
generate open switch intervals (OSIs). The device also can automatically enter the Open state if excess power
consumption is detected in the Si3200.
Forward Active (LF[2:0] = 001).
Linefeed is active, but audio paths are powered down until an off-hook condition is detected. The Si3220 and
Si3225 automatically enter a low power state to reduce power consumption during on-hook standby periods.
Forward On-Hook Transmission (LF[2:0] = 010).
Provides data transmission during an on-hook loop condition (e.g., transmitting FSK caller ID information
between ringing bursts).
Tip Open (LF[2:0] = 011).
Sets the portion of the linefeed interface connected to the TIP side of the subscriber loop to high-impedance
and provides an active linefeed on the RING side of the loop for ground start operation.
Ringing (LF[2:0] = 100).
Drives programmable ringing waveforms onto the subscriber loop (Si3220) or switches in a centralized ringing
generator by driving an external relay (Si3225).
Reverse Active (LF[2:0] = 101).
Linefeed circuitry is active, but audio paths are powered down until an off-hook condition is detected. The
Si3220 and Si3225 automatically enter a low power state to reduce power consumption during on-hook
standby periods.
Reverse On-Hook Transmission (LF[2:0] = 110).
Provide data transmission during an on-hook loop condition.
Ring Open (LF[2:0] = 111).
Sets the portion of the linefeed interface connected to the RING side of the subscriber loop to high-impedance
and provides an active linefeed on the TIP side of the loop for ground start operation.
device may also
Table 17. Linefeed States
Preliminary Rev. 0.91
more details. The register and RAM locations used for
programming the linefeed parameters are provided in
Table 18. See “Loop Voltage and Current Monitoring,”
“Power Monitoring and Power Fault Detection,” and
“Power
descriptions and register/RAM locations for these
functions.
Dissipation
Si3220/Si3225
Considerations”
for
detailed
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