SI3215-C-GMR Silicon Laboratories Inc, SI3215-C-GMR Datasheet - Page 23

• Manufacturer Part Number: SI3215-C-GMR
• Manufacturer: Silicon Laboratories Inc

Specifications of SI3215-C-GMR

• Lead Free Status / RoHS Status: Compliant

2. Functional Description
The ProSLIC
that provides all the SLIC, codec, and signal generation
functions needed for a complete analog telephone
interface.
overvoltage, ringing, supervision, codec, hybrid, and
test (BORSCHT) functions. Unlike most monolithic
SLICs, the Si3215 does not require externally-supplied
high-voltage battery supplies. Instead, it generates all
necessary battery voltages from a positive dc supply
using its own dc-dc converter controller. Two fully-
programmable tone generators can produce DTMF
tones, phase-continuous FSK (caller ID) signaling, and
call progress tones. The Si3201 linefeed interface IC
performs all high-voltage functions. As an option, the
Si3201 can also be replaced with low-cost discrete
components as shown in the typical application circuit in
Figure 12.
The ProSLIC is ideal for short loop applications, such as
terminal adapters, cable telephony, PBX/key systems,
wireless local loop (WLL), and voice-over-IP solutions.
The device meets all relevant LSSGR and CCITT
standards.
The linefeed provides programmable on-hook voltage,
programmable off-hook loop current, reverse battery
operation, loop or ground start operation, and on-hook
transmission ringing voltage. Loop current and voltage
are continuously monitored using an integrated A/D
converter. Balanced 5 REN ringing with or without a
programmable dc offset is integrated. The available
offset, frequency, waveshape, and cadence options are
designed to ring the widest variety of terminal devices
and to reduce external controller requirements.
A complete audio transmit and receive path is
integrated, including ac impedance and hybrid gain.
These features are software-programmable, allowing
for a single hardware design to meet international
requirements. Digital voice data transfer occurs over a
standard PCM bus. Control data is transferred using a
standard SPI. The device is available in 38-pin QFN or
TSSOP packages.
The
®
is a single, low-voltage CMOS device
ProSLIC
performs
all
battery,
Rev. 0.92
2.1. Si3210 to Si3215 Differences
The Si3215 is very similar to the Si3210 in terms of its
operation. The complete functionality of the Si3215 is
covered in this data sheet. There are some hardware
and software differences between the Si3215 and the
Si3210 that are mentioned here for customers migrating
designs from the Si3210 to the Si3215.
2.1.1. Hardware Changes
2.1.2. Software Changes
2.2. Linefeed Interface
The ProSLIC’s linefeed interface offers a rich set of
features and programmable flexibility to meet the
broadest applications requirements. The dc linefeed
characteristics are software-programmable; key current,
voltage, and power measurements are acquired in real
time and provided in software registers.
The Si3215 adds China and Japan impedances. See
"2.7. Two-Wire Impedance Matching" on page 42.
Pulse metering and DTMF detection are removed
from the Si3215.
The pinout on the QFN package has changed. See
"5. Pin Descriptions: Si3215" on page 107.
External resistors R8 and R9 are changed from
470 Ω to 4.7 k Ω . See the typical application circuit
in Figure 12.
The sample rate for the two-tone oscillators has
changed from 8 kHz to 16 kHz; therefore, the audio
tone coefficient equation has changed. See "2.4.2.
Oscillator Frequency and Amplitude" on page 33 for
a complete description.
The Si3215 is automatically calibrated for gain
mismatch, and manual calibration is not required.
Refer to “AN35: Si321x User’s Quick Reference
Guide”.
The Indirect Registers have been remapped. When
porting code from the Si3210 to the Si3215, the
indirect register access function needs to be
modified. See "4. Indirect Registers" on page 101.
Si3215
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