SI3015-FS Silicon Laboratories Inc, SI3015-FS Datasheet - Page 14

• Manufacturer Part Number: SI3015-FS
• Description: SI2400 ISOMODEM LINE-SIDE
• Manufacturer: Silicon Laboratories Inc

Specifications of SI3015-FS

• Data Format: V.90
• Interface: Serial
• Voltage - Supply: 3.3 V ~ 5 V
• Mounting Type: Surface Mount
• Package / Case: 16-SOIC (0.154", 3.90mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Baud Rates: -

Si2400
Functional Description
The Si2400 ISOmodem is a complete modem chipset
with integrated direct access arrangement (DAA) that
provides a programmable line interface to meet global
telephone line requirements. Available in two 16-pin
small outline packages, this solution includes a DSP data
pump, a modem controller, an analog front end (AFE), a
DAA, and an audio codec.
The modem, which accepts simple modem AT
commands, provides connect rates of up to 2400 bps,
full-duplex over the Public Switched Telephone Network
(PSTN) with V.42 hardware support through HDLC
framing. To minimize handshake times, the Si2400 can
implement a V.25-based fast connect. The modem also
supports the V.23 reversing protocol and standard alarm
formats including SIA.
The Si2400 ISOmodem provides numerous features for
embedded modem applications including caller ID
detection and decoding for the US, UK, and Japanese
caller ID formats. Both DTMF decoding and generation
are provided on chip as well. Call progress is supported
both at a high level through echoing result codes and at a
low level through user-programmable biquad filters and
parameters such as ring period, ring on/off time, and
dialing interdigit time.
This device is ideal for embedded modem applications
due to its small board space, low power consumption,
14
V.21
V.22
V.22bis
V.23
V.23
Bell 103
Bell 212A
Security
SIA—Pulse
SIA Format
Notes:
1. The V.22 and V.22bis standards refer to V.14 DTE (UART) configurations. The Si2400 does not support V.14 breaks.
2. The Si2400 only adjusts its DCE rate from 2400 bps to 1200 bps if it is connecting to a V.22-only (1200 bps only)
1
In order to support overspeeding by the remote modem, the Si2400 DTE speed must be greater than the modem
(line) data rate.
modem. Because the V.22bis specification does not outline a fallback procedure, the host should implement a
fallback mechanism consisting of hanging up and connecting at a lower baud rate. Retraining to accommodate
changes in line conditions which occur during a call must be implemented by terminating the call and redialing.
Configuration
1,2
Table 11. Selectable Configurations
Modulation
DPSK
DPSK
DTMF
Pulse
QAM
FSK
FSK
FSK
FSK
Rev. 1.1
Frequency (Hz)
1080/1750
1200/2400
1200/2400
1300/2100
1300/1700
1170/2125
1200/2400
1170/2125
and global compliance. The Si2400 solution integrates a
silicon DAA using Silicon Laboratories’ proprietary
ISOcap™ technology. This highly integrated DAA can be
programmed to meet worldwide PTT specifications for ac
termination, dc termination, ringer impedance, and ringer
threshold. The DAA also can monitor line status for
parallel handset detection and for overcurrent conditions.
The Si2400 is designed for rapid assimilation into existing
modem applications. The device interfaces directly
through a UART to a microcontroller. The Si2400URT-
EVB connects directly to a standard RS-232 interface.
This allows for PC evaluation of the modem immediately
upon powerup via HyperTerminal or any standard
terminal software.
The chipset can be fully programmed to meet
international telephone line interface requirements with
full compliance to FCC, CTR21, JATE, and other country-
specific PTT specifications. In addition, the Si2400 has
been designed to meet the most stringent worldwide
requirements
immunity, lightning surges, and safety requirements.
The Si2400 solution needs only a few low-cost discrete
components to achieve global compliance. See Figure 3
on page 10 for a typical application circuit.
Carrier
—
—
for
300 half-duplex
Data Rate
1200/75
600/75
(bps)
out-of-band
1200
2400
1200
Low
300
300
40
Full; plus reversing
energy,
Compliance
300 bps only
No retrain
Standard
(Europe)
Full
Full
Full
Full
Full
Full
billing-tone