SI3068-B-FT Silicon Laboratories Inc, SI3068-B-FT Datasheet - Page 12

• Manufacturer Part Number: SI3068-B-FT
• Description: IC DAA FCC+ EMBEDDED 10SOIC
• Manufacturer: Silicon Laboratories Inc
• Series: -r

Specifications of SI3068-B-FT

• Function: Direct Access Arrangement (DAA)
• Interface: *
• Number Of Circuits: 1
• Voltage - Supply: *
• Current - Supply: *
• Power (watts): *
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: *
• Package / Case: *
• Includes: *
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Si3068
4.5. Line Voltage Sensing
The Si3068 measures line voltage when on-hook. The LVS[6:0] bits (register 29) report line voltage with 1 V/bit
resolution (typical). The LVS bits can be used to determine if a line is present and, if so, if it is idle or in use. Since
these operations can be performed while on-hook, there is no need to enter the off-hook state and possibly disturb
a call in progress to determine the status of the line. The typical LVS transfer function is shown in Figure 7 and
detailed in Table 7.
12
0000100
LVS
127
0000000
LVS[6:0]
1111111
4
0
0
b
– 1111110
Figure 7. Line Voltage Status Transfer Function
Table 7. Line Voltage Status Transfer Function
3 4
b
b
b
V
3.5 V < V
V
LINE
LINE
Line Voltage (V)
< 3.5 V
> 126.5 V
Rev. 1.0
LINE
< 126.5 V
Line Voltage
126