PEB 4364 T V1.2 Infineon Technologies, PEB 4364 T V1.2 Datasheet - Page 45

• 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

2.5
Because of the 170 V technology used for the SLIC, a ringing voltage of up to 85 Vrms
sinusoidal or up to 100 Vrms trapezoidal can be generated on-chip without the need for
an external ringing generator (This is with 20 V offset. Higher ring amplitudes are
possible if lower DC offset voltage is required.)
The SLICOFI-2x generates a sinusoidal ringing signal that causes less noise and cross-
talk in neighboring lines than a trapezoidal ringing signal. The ringing frequency is
programmable from 3 Hz to 300 Hz.
SLIC-E/-E2, SLIC-S/-S2 and SLIC-P support different ringing methods (see
2.5.3).
2.5.1
A typical ringer load can be thought of as a resistor in series with a capacitor. Ringer
loads are usually described as a Ringer Equivalence Number (REN) value. REN is used
to describe the on-hook impedance of the terminal equipment and is actually a
dimensionless ratio that reflects a certain load. REN definitions vary from country to
country. A commonly used REN is described in FCC Part 68 that defines a single REN
as either 5 k , 7 k
REN is equivalent to parallel connection of n single RENs. In this manual, all references
to REN assume the 7 k model.
For example, a 1 REN and 5 REN load, typically used in the USA, would be:
Figure 22
2.5.2
After the subscriber has gone off-hook, the ringing signal must be removed within a
specified time, and power must start feeding to the subscriber's phone. There are two
ring trip methods: DC Ring Trip Detection and AC Ring Trip Detection.
DC Ring Trip Detection
Most applications that utilize the DuSLIC chip set use DC ring trip detection. By applying
a DC offset together with the ringing signal, a transversal DC loop current starts to flow
when the subscriber goes off-hook. This DC current is sensed by the SLIC and in this
way is used as an off-hook criterion. The SLIC supplies this information to the
SLICOFI-2x at the IT pin. The SLICOFI-2x continuously integrates the sensed line
Preliminary Data Sheet
Ringing
Ringer Load
Ring Trip
6930
Typical Ringer Loads of 1 and 5 REN used in USA
1 REN
or 8 k of AC impedance at 20 Hz. The impedance of an n-multiple
8 µF
45
1386
Functional Description
5 REN
40 µF
DS3, 2003-07-11
ezm14024
DuSLIC
Chapter