SI2493-C-FT Silicon Laboratories Inc, SI2493-C-FT Datasheet - Page 199
SI2493-C-FT
Manufacturer Part Number
SI2493-C-FT
Description
56 KBPS, V.92 ISOMODEM SYSTEM-SIDE - LEAD-FREE TSSOP 0 TO 7
Manufacturer
Silicon Laboratories Inc
Specifications of SI2493-C-FT
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
Parallel
Voltage - Supply
3 V ~ 3.6 V
Mounting Type
Surface Mount
Package / Case
24-TSSOP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
SI2493-C-FT
Manufacturer:
Silicon Labs
Quantity:
135
Part Number:
SI2493-C-FTR
Manufacturer:
SIEMENS/西门子
Quantity:
20 000
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Details of Some Low Speed Protocols
The following annotated recordings are shown to give very fundamental views of what to expect the EPOS modem
transactions to look like. There are many possible variations of these examples, both in compliance with the
specifications and not, but supported by common use. There are also very unusual variations that Silabs has made
efforts to support in order to allow customers to connect to non-standard and essentially broken modems. Some of
these are described in a later section.
Bell 212 (2225 Hz
Answer Tone)
DTMF dialing
DTMF dialing
2100 Hz
Answer Tone
Figure 64. Appearance of Bell 212 Protocol
Figure 65. Appearance of V.22 Protocol
Rev. 0.9
Unscrambled Binary
Ones (USB1) signal.
Two tones at 2250 and
2850 Hz.
Scrambled Binary
Ones and Scrambled
Data; visually indis-
tinguishable from each
other.
Calling modem’s
Scrambled Binary
Ones and Scrambled
Data; visually indis-
tinguishable from
each other.
Calling modem’s
Scrambled Binary
Ones and Scrambled
Data; visually indis-
tinguishable from
each other.
Answering modem’s
Scambled Binary
Ones and Scrambled
Data; visually indis-
tinguishable from
each other.
AN93
199
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