PEB 4364 T V1.2 Infineon Technologies, PEB 4364 T V1.2 Datasheet - Page 52

• Manufacturer Part Number: PEB 4364 T V1.2
• Description: IC SLIC VOICE ACCESS PDSO-36
• Manufacturer: Infineon Technologies
• Series: DuSLICr

Specifications of PEB 4364 T V1.2

• Function: Dual Channel Subscriber Line Interface Circuit (DuSLIC)
• Interface: IOM-2, PCM
• Number Of Circuits: 2
• Voltage - Supply: 3.3 V ~ 5 V
• Current - Supply: 105mA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 36-PDSO
• Includes: DTMF Generator and Decoder, Line Echo Cancellation (LEC), Teletax (TTX) Generation, Universal Tone Detection (UTD)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power (watts): -
• Other names: PEB4364TV1.2XT; SP000007728

In both balanced and unbalanced ringing modes, SLICOFI-2 automatically applies and
removes the ringing signal during zero-crossing. This reduces noise and cross-talk to
adjacent lines.
2.5.7
SLICOFI-2x supports external (balanced or unbalanced) ringing for higher ringing
voltage requirements with all SLIC versions. In this case, the integrated ring trip
functionality of the DuSLIC may be
unbalanced ringing, see
Because high voltages are involved, an external relay should be used to switch the RING
line off and to switch the external ringing signal together with a DC voltage to the line.
The DC voltage must be applied for the internal ring trip detection mechanism that
operates for external ringing in the same way as for internal ringing.
The SLICOFI-2x must be set to the external ringing mode by the REXT-EN bit in register
BCR2. A synchronization signal of the external ringer is applied to the SLICOFI-2x via
the RSYNC pin. The external relay is switched on or off synchronously to this signal via
the IO1 pin of the SLICOFI-2x, according to the actual mode of the DuSLIC. An interrupt
is generated if the DC current exceeds the programmed ring trip threshold.
2.6
Signaling in the subscriber loop is monitored internally by the DuSLIC chip set.
Supervision is performed by sensing the longitudinal and transversal line currents on the
Ring and Tip wires. The scaled values of these currents are generated in the SLIC and
are fed to the SLICOFI-2x via the IT and IL pins.
Transversal line current:
Longitudinal line current:
where
Off-hook Detection
Loop start signaling is the most common type of signaling. The subscriber loop is closed
by the hook switch inside the subscriber equipment.
•
Preliminary Data Sheet
In Active mode, the resulting transversal loop current is sensed by the internal current
sensor in the SLIC. The IT pin of the SLIC indicates the subscriber loop current to the
SLICOFI-2x. External resistors (
current information to a voltage on the ITA (or ITB) pin.
The analog information is first converted to a digital value. It is then filtered and
processed further which effectively suppresses line disturbances. If the result
exceeds a programmable threshold, an interrupt is generated to indicate off-hook
detection.
I
R
,
I
T
External Unbalanced Ringing
Signaling (Supervision)
are the loop currents on the Ring and Tip wires.
Figure 92 (Page
I
I
TRANS
LONG
= (
= (
I
I
R
R
R
–
+
IT1
I
I
T
T
)/2
,
used. For a detailed application diagram of
)/2
R
357) and
52
IT2,
see
Figure 90
Figure 94 (Page
on
Functional Description
Page
359).
353) convert the
DS3, 2003-07-11
DuSLIC