SI2493-C-FS Silicon Laboratories Inc, SI2493-C-FS Datasheet - Page 167

• Manufacturer Part Number: SI2493-C-FS
• Description: IC ISOMODEM SYSTEM-SIDE 16SOIC
• Manufacturer: Silicon Laboratories Inc

Specifications of SI2493-C-FS

• Mfg Application Notes: SI2493/57/34/15/04, Appl Note AN93
• Data Format: V.21, V.22, V.23, V.29, V.32, V.34, V.90, V.92, Bell 103, Bell 212A
• Baud Rates: 56k
• Interface: UART
• Voltage - Supply: 3 V ~ 3.6 V
• Mounting Type: Surface Mount
• Package / Case: 16-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

The Si3008 meets the DTMF and pulse dialing requirements for the countries in Table 105. Higher DTMF signal
levels than those required can be achieved.
Sufficiently high DTMF levels will clip due to the output signal level limitations of the Si3008. DTMF distortion
between 10–20% is generally acceptable.
Loop current limiting (previously required by CTR/TBR21 countries, such as France) is not supported by the
Si3008. Although current limiting is no longer required for certification, some customers require it for backward
compatibility.
00100
00000
LCS[4:0]
11111
b
b
256
224
192
160
128
96
64
32
– 00011
– 11110
0
0
b
b
b
16
Insufficient line current for normal operation. Use the DODI bit
(Offset 0x34, bit 3) to determine if a line is still connected.
Normal operation.
Loop current is excessive (>160 mA).
Table 107. Loop Current Sense Transfer Function
32
Figure 35. Typical LCS Transfer Function
48
Loop Current (m A)
64
Rev. 0.9
80
Condition
96
112
128
144
AN93
167