V.22BIS ISOMODEM - Silicon Laboratories
Description
Si2401/Si3008
V.
22 B I S I S O M O D E M ® W I T H L O W - C O S T D A A
Features
Data modem formats
2400 bps: V.
22bis 1200 bps: V.
22, V.
23, Bell 212A 300 bps: V.
21, Bell 103 Fast connect and V.
23 reversing www.
DataSheet4U.
com SIA and other security protocols
Integrated DAA
Over 6000 V capacitive isolation Parallel phone detection Compliant with FCC, China, JATE, and 31 other PTTs Line-in-use detection
27 MHz CLKIN support Caller ID detection and decode UART with flow control
AT command set support Call progress support 3.
3 V Power Lead-free and RoHS-compliant packages
Ordering Information See page 66.
Applications
Set-top boxes Point-of-sale ATM terminals Security systems Medical monitoring Power meters
Pin Assignments
Si2401
CLKIN/XTALI 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 GPIO1/EOFR GPIO2/CD GPIO3/ESC VA GND GPIO4/INT/AOUT C1A C2A XTALO
Description
The Si2401 ISOmodem is a complete, two-chip, 2400 bps modem integrating Silicon Laboratories’ fourth-generation direct access arrangement (DAA), which provides a globally-programmable telephone line interface with an unprecedented level of integration.
Available in two small packages, this compact solution eliminates the need for a separate DSP data pump, modem controller, codec, isolation transformer, relay, opto-isolators, and 2–4 wire hybrid.
The Si2401 provides conventional data formats at connect rates of up to 2400 bps with full-duplex operation over the Public Switched Telephone Network (PSTN).
This device is ideal for embedded modem applications due to its small size, minimal external component count, and low power consumption.
®
GPIO5/RI VD RXD TXD CTS RESET
Si3008
C1B C2B VREG CID
1 2 3 4 8 7 IGND 6 5 9
RX DCT QB QE
Functional Block Diagram
Si2401
RXD TXD CTS RESET
U.
S.
Patent #5,870,046 U.
S.
Patent #6,061,009 Other patents pending
UART
µ Controller (AT Decoder, Call Progress) Isolation Interface
CD/GPIO2 INT/GPIO4 RI/GPIO5 XTALI XOUT
Control Interface
DSP (Data Pump)
To phone line
Clock...
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