SI2457-C-FT Silicon Laboratories Inc, SI2457-C-FT Datasheet - Page 61

• 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

U7A GENA
Reset settings = 0x0000
*Note: When V22HD, HDLC, or FAST bits are set, \N0 (wire mode) must be used.
Name
15:8
Type
Bit
5:3
Bit
7
6
2
1
0
Reserved Read returns to zero.
Reserved Read returns to zero.
D15 D14 D13 D12 D11 D10
V22HD
Name
HDLC
FAST
DOP
ADD
Dial or Pulse.
0 = Normal ATDTW operation
1 = Use ATDTW for Pulse/Tone Dial Detection (see also ATDW command)
Adaptive Dialing
1 = Enable
0 = Disable
Attempt DTMF dial, then fall back to pulse dialing if unsuccessful. First digit is dialed as
DTMF. If a dialtone is still present after two seconds, the Si2457/34/15/04 will redial the first
digit and remaining digits as pulse. If a dialtone is not present after two seconds, the Si2457/
34/15/04 will dial the remaining digits as DTMF.
V.22bis Synchronous Mode.*
0 = Normal asynchronous mode.
1 = Transparent HDLC mode.
Synchronous Mode.*
0 = Normal asynchronous mode.
1 = Transparent HDLC mode.
Fast Connect.*
0 = Normal modem handshake timing per ITU/Bellcore standards.
1 = Fast connect modem handshake timing.
D9
Rev. 1.1
D8
DOP ADD
R/W R/W
D7
Function
D6
D5
Si2457/34/15/04
D4
D3
V22HD HDLC FAST
R/W
D2
R/W
D1
R/W
D0
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