SI3018FS Silicon Laboratories Inc, SI3018FS Datasheet - Page 21

• Manufacturer Part Number: SI3018FS
• Description: DAA - MODEM FA19 TELECOM/DATACO
• Manufacturer: Silicon Laboratories Inc

5. Functional Description
The Si3056 is an integrated direct access arrangement
(DAA) that provides a programmable line interface to
meet global telephone line interface requirements. The
Si3056 implements Silicon Laboratories
isolation technology and offers the highest level of
integration by replacing an analog front end (AFE), an
isolation transformer, relays, opto-isolators, and a 2- to
4-wire hybrid with two 16-pin packages.
The Si3056 DAA is software programmable to meet
global requirements and is compliant with FCC, TBR21,
JATE, and other country-specific PTT specifications as
shown in Table 16 on page 26. In addition, the Si3056
meets the most stringent worldwide requirements for
out-of-band energy, emissions, immunity, high-voltage
surges, and safety, including FCC Part 15 and 68,
EN55022, EN55024, and many other standards.
5.1. Upgrading from the Si3034/35/44 to
The Si3056 offers Silicon Laboratories
currently using Si3034/35/44 standard serial interface
DAA chipsets with an upgrade path for use in new
designs. The Si3056 digital interface is similar to the
Si3034/35/44 DAAs, thus the Si3056 retains the ability
to connect to many widely available DSPs. This also
allows customers to leverage software developed for
existing Si3034/35/44 designs. More importantly, the
Si3056 also offers a number of new features not
provided in the Si3034/35/44 DAAs. An overview of the
feature differences between the Si3044 and the Si3056
is presented in Table 14. Finally, the globally-compliant
Si3056 can be implemented with roughly half the
external components required in the already highly
integrated Si3034/35/44 DAA application circuits. The
following items have changed in the Si3056 as
compared to the Si3034/35/44 DAAs:
The pinout, the application circuit, and the bill of
materials. The Si3056 is not pin compatible with
Si3034/35/44 DAA chipsets.
Si3056
®
®
customers
patented
Rev. 1.05
5.2. Line-Side Device Support
Three different line-side devices can be used with the
Si3056 system-side device:
New features have been added to the Si3056
including more ac terminations, a programmable
hybrid, finer gain/attenuation step resolution, finer
resolution loop current monitoring capability, ring
validation, more HW interrupts, a 200 Hz low
frequency filter pole. (See the appropriate functional
descriptions.)
The secondary communication data format (see
"5.26.Digital Interface" on page 37).
The low-power sleep mode, and system
requirements to support wake-on-ring. (See
"5.28.Power Management" on page 39.)
Globally-compliant line-side device—Targets global
DAA requirements. Use the Si3018 global line-side
device for this configuration. This line-side device
supports both FCC-compliant countries and non-
FCC-compliant countries.
Globally-compliant, enhanced features line-side
device—Targets embedded and voice applications
with global DAA requirements. Use the Si3019 line-
side device for this configuration. The Si3019
contains all the features available on the Si3018,
plus the following additional features/enhancements:
Globally-compliant, low-speed only line-side
device—Targets embedded 2400 bps soft modem
applications. Use the Si3010 line-side device for this
configuration. The Si3010 contains all the features
available on the Si3018, except the transmit and
receive paths are optimized and tested only for
modem connect rates up to 2400 bps.
Sixteen selectable ac terminations to increase return
loss and trans-hybrid loss performance.
Higher transmit and receive level mode.
Selectable 200 Hz low frequency pole.
–
0.1 dB increments for the transmit and receive paths.
Programmable line current/voltage threshold interrupt.
16 to 13.5 dB digital gain/attenuation adjustment in
Si3018/19/10
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