SI2493-C-FS Silicon Laboratories Inc, SI2493-C-FS Datasheet - Page 99

• 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

XON/XOFF is a software flow control in which the
modem and the terminal control data flow by sending
XON characters (^Q/11h) and XOFF characters (^S/
13h). XON/XOFF flow control is enabled on the Si2493/
57/34/15/04 with AT\Q4.
DCD does not de-assert during a retrain (see S9 for
carrier presence timer and S10 for carrier loss timer).
Parallel
Mode
Tx Data
CTS
Rx data
RXF bit
RTS
REM bit
14-Character
Hardware
Buffer
12-Character
Hardware
1024 Character Elastic Tx Buffer
Buffer
Figure 16. Transmit Data Buffers
Figure 17. Receive Data Buffers
128 Characters
796 Characters
1024 Character Elastic Rx Buffer
Rev. 0.9
SRAM
CTS always de-asserts during initial training, retrain,
and at disconnect regardless of the \Qn setting. For \Q0
CTS, flow control is disabled, and CTS is inactive during
data transfer. The modem remains in the data mode
during normal automatic retrains. The host can force a
retrain by escaping to the command mode and sending
ATO1 or ATO2.
796 Characters
128 Characters
SRAM
CTS Deasserts
CTS Asserts
Transmit
Receive
AN93
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