SI3018-F-FSR Silicon Laboratories Inc, SI3018-F-FSR Datasheet - Page 82

• Manufacturer Part Number: SI3018-F-FSR
• Description: Modem Chip Chipset 16-Pin SOIC T/R
• Manufacturer: Silicon Laboratories Inc

Specifications of SI3018-F-FSR

• Package: 16SOIC
• Main Category: Chipset
• Sub-category: Data/Voice
• Typical Operating Supply Voltage: 3.3 V
• Power Supply Type: Digital
• Typical Supply Current: 8.5 mA
• Minimum Operating Supply Voltage: 3 V
• Maximum Operating Supply Voltage: 3.6 V
• Data Rate: 54.6875Kbps
• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (min): 3V
• Operating Supply Voltage (max): 3.6V
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Pin Count: 16
• Mounting: Surface Mount
• Lead Free Status / Rohs Status: Compliant

Si3050 + Si3018/19
Register 31. DAA Control 5
Reset settings = 0010_0000
82
6:5
Bit
7
4
3
2
1
0
Name
Type
Bit
Reserved Always write these bits to zero.
Reserved Always write these bits to zero.
FOH[1:0] Fast Off-Hook Selection.
Name
OHS2
FULL
LVFD
FILT
FULL
R/W
Full Scale Transmit and Receive Mode.
0 = Default.
1 = Transmit/receive full scale.
This bit changes the full scale of the ADC and DAC from 0 dBm min to +3.2 dBm into a 600 
load (or 1 dBV into all reference impedances). When this bit is set, the DCV[1:0] bits
(Register 26) should be set to all 1s. The MINI[1:0] bits also should be set to all 0s. This ensures
correct operation of the full scale mode.
These bits determine the length of the off-hook counter. The default setting is 128 ms.
00 = 512 ms
01 = 128 ms
10 = 64 ms
11 = 8 ms
On-Hook Speed 2.
Filter Pole Selection.
0 = The receive path has a low –3 dBFS corner at 5 Hz.
1 = The receive path has a low –3 dBFS corner at 200 Hz.
Line Voltage Force Disable (Si3019 line-side only).
0 = Normal operation.
1 = The circuitry that forces the LVS register (Register 29) to all 0s at 3 V or less is disabled. The
LVS register may display unpredictable values at voltages between 0 to 2 V. All 0s are displayed
if the line voltage is 0 V.
This bit, in combination with the OHS bit (Register 16) and the SQ[1:0] bits on-hook speeds
specified are measured from the time the OH bit is cleared until loop current equals zero.
OHS
D7
0
0
1
OHS2
D6
0
1
X
FOH[1:0]
RW
SQ[1:0]
D5
00
00
11
Rev. 1.31
D4
0
26 ms ±10% (meets Australia spark quenching spec)
Mean On-Hook Speed
Less than 0.5 ms
3 ms ±10% (meets ETSI standard)
Function
OHS2
R/W
D3
D2
0
FILT
R/W
D1
LVFD
R/W
D0