Si3210/Si3211/Si3212
Functional Description
The ProSLIC™ is a single low-voltage CMOS device 1.5 V steps. The loop current limit (I ) defines the
LIM
that provides all the SLIC, codec, DTMF detection, and constant current zone and is programmable from 20 mA
signal generation functions needed for a complete to 41 mA in 3 mA steps. The ProSLIC has an inherent
analog telephone interface. The ProSLIC performs all dc output resistance (R ) of 160 Ω.
O
battery, overvoltage, ringing, supervision, codec, hybrid,
and test (BORSCHT) functions. Unlike most monolithic
SLICs, the Si3210 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. DTMF decoding and pulse metering
signal generation are also integrated.
V(TIP-RING) (V)
Constant
Voltage
Zone
VOC
RO=160 Ω
Constant Current
Zone
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.
ILIM
ILOOP(mA)
Figure 14. Simplified DC Current/Voltage
Linefeed Characteristic
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.
The TIP-to-RING voltage (V ) is offset from ground by
OC
a programmable voltage (V ) to provide voltage
CM
headroom to the positive-most terminal (TIP in forward
polarity states and RING in reverse polarity states) for
carrying audio signals. Table 20 summarizes the
parameters to be initialized before entering an active
state.
Table 20. Programmable Ranges of DC
Linefeed Characteristics
A complete audio transmit and receive path is
integrated, including DTMF decoding, 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 a 38-pin TSSOP.
Parameter Programmable Default
Register
Bits
Location*
Range
Value
ILIM
VOC
VCM
20 to 41 mA
20 mA
ILIM[2:0]
VOC[5:0]
VCM[5:0]
Direct
Register 71
0 to 94.5 V
0 to 94.5 V
48 V
3 V
Direct
Register 72
Direct
Linefeed Interface
Register 73
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
realtime and provided in software registers.
*Note: The ProSLIC uses registers that are both directly
and indirectly mapped. A “direct” register is one that
is mapped directly.
DC Feed Characteristics
The ProSLIC has programmable constant voltage and
constant current zones as depicted in Figure 14. Open
circuit TIP-to-RING voltage (V ) defines the constant
OC
voltage zone and is programmable from 0 V to 94.5 V in
Preliminary Rev. 1.11
21
ETC [ ETC ]
