SI2457-C-FT Silicon Laboratories Inc, SI2457-C-FT Datasheet - Page 27

• Manufacturer Part Number: SI2457-C-FT
• Description: IC ISOMODEM SYSTEM-SIDE 24TSSOP
• Manufacturer: Silicon Laboratories Inc

Specifications of SI2457-C-FT

• Package / Case: 24-TSSOP
• Mfg Application Notes: SI2493/57/34/15/04, Appl Note AN93
• Data Format: V.21, V.22, V.23, V.32, V.34, V.90, Bell 103, Bell 212A
• Baud Rates: 56k
• Interface: Parallel, UART
• Voltage - Supply: 3 V ~ 3.6 V
• Mounting Type: Surface Mount
• Operating Frequency: 4.92 MHz
• Supply Voltage (max): 3.6 V
• Supply Voltage (min): 3 V
• Supply Current: 26 mA
• Operating Temperature Range: 0 C to + 70 C
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

+IFC Options
+IFC = A
+IFC = A,B
+ITF Options
+ITF = A
+ITF = A,B
+ITF = A,B,C
+MR = X
+MS Options
+MS = A
+MS = A,B
+MS = A,B,C
+MS = A,B,C,D
+MS = A,B,C,D,E
+MS = A,B,C,D,E,F
Command
Table 10. Basic AT Command Set (Command Defaults in Bold) (Continued)
Specifies the flow control to be implemented.
A
B
Transmit flow control threshold.
A
B
C
Modulation reporting control.
X
0
1
If enabled, the intermediate result code is transmitted at the point during connect negotiation.
The format of this result code is as follows:
+MCR: <carrier> e.g. +MCR: V32B
+MRR: <rate>
Modulation Selection.
A
B
C,D
E,F
Specifies the flow control method used by the modem to control data from the host
Specifies the flow control method used by the host to control data from the modem
0 None
1 Local XON/OFF flow control.
2 Hardware flow control (CTS).
Threshold above which the modem will generate a flow off signal
<0 to 511> bytes
Threshold below which the modem will generate a flow on signal
<0 to 511> bytes
Polling interval for <EM><BNUM> indicator
0 to 300 in 10 msec units.
2 Hardware flow control (RTS)
0 None
1 Local XON/OFF flow control. Does not pass XON/XOFF character to the remote
Disabled
Enabled
Mode
V21
V22
V22B
V32
V32B
V34
V90
modem.
0
1
Preferred modem carrier
Automatic modulation negotiation
Min TX rate/Max TX rate are optional numeric values that specify the lowest value
Min RX rate/Max RX rate are optional numeric values which specify the highest
at which the DCE may establish a connection. If unspecified (set to 0), they are
determined by the carrier and automode settings.
value at which the DCE may establish a connection. If unspecified (set to 0), they
are determined by the carrier and automode settings.
ITU-T V.21
ITU-T V.22
ITU-T V.32
ITU-T V.34 (default for Si2434)
ITU-T V.90 (default for Si2457)
ITU-T V.22bis (default for Si2404)
ITU-T V.32bis (default for Si2415)
Disabled
Enabled
e.g. +MRR: 14400
Rev. 1.1
Action
Si2457/34/15/04
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