SI2493-C-FS Silicon Laboratories Inc, SI2493-C-FS Datasheet - Page 200
SI2493-C-FS
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
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AN93
This looks the same as the V.22 bis protocol above except for S1 signal used for signaling V.22 bis(ness) and for
start of retrains.
200
2100 Hz Answer Tone.
DTMF dialing.
2100 Hz Answer Tone.
Unscrambled Binary
Ones (USB1) signal.
Two tones at 2250
and 2850 Hz.
The three short horizontal
lines are the S1 signal
that triggers V.22bis train-
ing. The S1 signal is an
unscrambled double
digit 00 – 01.
Figure 67. Appearance of V.22 Fast Connect Protocols
Figure 66. Appearance of V.22 bis Protocol
Rev. 0.9
Caller Responds with
SB1s and scrambled
data.
Answering modem’s
scrambled binary
ones and scrambled
data; visually indis-
tinguishable from
each other.
Calling modem’s
Scrambled Binary
Ones and Scram-
bled Data; visually
indistinguishable
from each other.
Caller sends SB1s
immediately.
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