SI3019-F-FT Silicon Laboratories Inc, SI3019-F-FT Datasheet - Page 36

• Manufacturer Part Number: SI3019-F-FT
• Description: IC VOICE DAA GCI/PCM/SPI 16TSSOP
• Manufacturer: Silicon Laboratories Inc
• Type: Chipsetr

Specifications of SI3019-F-FT

• Package / Case: 16-TSSOP
• Function: Data Access Arrangement (DAA)
• Interface: GCI, PCM, SPI
• Number Of Circuits: 1
• Voltage - Supply: 3 V ~ 3.6 V
• Current - Supply: 8.5mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Includes: Line Voltage Monitor, Loop Current Monitor, Overload Detection, Parallel Handset Detection, Polarity Reversal Detection, TIP and
• Product: Modem Chip
• Supply Voltage (min): 3 V
• Supply Current: 8.5 mA
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power (watts): -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

Si3050
Notes:
5.26. Overload Detection
The Si3050 can be programmed to detect an overload
condition that exceeds the normal operating power
range of the DAA circuit. To use the overload detection
feature, the following steps should be followed:
1. Set the OH bit (Register 5, bit 0) to go off-hook, and
2. Enable overload detection by then setting the OPE
If the DAA senses an overload situation it automatically
presents an 800 Ω impedance to the line to reduce the
hookswitch current. At this time, the DAA also sets the
OPD bit (Register 19, bit 0) to indicate that an overload
condition exists. The line current detector within the
DAA has a threshold that is dependent on the ILIM bit
(Register 26). When ILIM = 0, the overload detection
threshold equals 160 mA. When ILIM = 1, the overload
detection threshold equals 60 mA. The OPE bit should
always be cleared before going off-hook.
36
RCALD Bit
FOH[1] Bit
FOH[0] Bit
CALD Bit
1. The off-hook counter and calibrations prevent transmission or reception of data for 402.75 ms (default) for the line
2. The caller alert signal (CAS) tone transmits from the CO to signal an incoming call.
3. The device is taken on-hook to read the line voltage in the LVS bits to detect parallel handsets. In this mode, no data is
4. When the device returns off-hook, the normal off-hook counter is reduced to 8 ms. If the CALD and RCALD bits are set,
5. After allowing the off-hook counter to expire (8 ms), normal transmission and reception can continue. If CID data
wait 25 ms to allow line transients to settle.
bit (Register 17, bit 3).
OH Bit
voltage to settle.
transmitted on the DTX pin.
then the automatic calibrations are not performed.
reception is required, send the appropriate signal to the CO at this time.
LINE
On-Hook
Figure 24. Implementing Type II Caller ID on the Si3050/19
(402.75 ms nominally)
Off-Hook Counter
and Calibration
1
Of f -Hook
Rev. 1.2
5.27. Gain Control
The Si3050 supports multiple levels of gain and
attenuation for the transmit and receive paths.
The TXG2 and RXG2 bits (Registers 38–39) enable
gain or attenuation in 1 dB increments for the transmit
and receive paths (up to 12 dB gain and 15 dB
attenuation). The TGA2 and RGA2 bits select either
gain or attenuation. The TXG3 and RXG3 bits
(Registers 40–41) enable gain or attenuation in 0.1 dB
increments up to 1.5 dB for the transmit and receive
paths. The TGA3 and RGA3 bits select either gain or
attenuation. The transmit and receive paths can be
individually muted with the TXM and RXM bits
(Register 15). The signal flow through the Si3050 and
the Si3018/19 is shown in Figures 25–26.
CA S Tone
Received
2
On-Hook
3
Off-Hook Counter
(8 ms)
4
Of f -Hook
A ck
5