PEB 4364 T V1.2 Infineon Technologies, PEB 4364 T V1.2 Datasheet - Page 63

• 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

2.8.3
The DuSLIC-E/-E2/-P contains an adaptive Line Echo Cancellation (LEC) unit for the
cancellation of near end echoes. With the adaptive balancing of the LEC unit, the
Transhybrid Loss can be improved up to a value of approximately 50 dB. The maximum
echo cancellation time selectable is 8 ms. The line echo cancellation unit is especially
useful in combination with the DTMF detection unit. In critical situations the performance
of the DTMF detection can be improved.
If a line echo cancellation length (LEC Length) of 8 ms is used, please take care about
the MIPS requirements described in
The DuSLIC-E/-E2/-P line echo canceller is compatible with applicable ITU-T G.165 and
G.168 standards. An echo cancellation delay time of up to 8 ms can be programmed.
The LEC unit basically consists of an Finite Impulse Response (FIR) filter, a shadow FIR
filter, and a coefficient adaptation mechanism between these two filters as shown in
Figure
Figure 31
The adaptation process is controlled by the three parameters Pow
Level Receive), DeltaP
on Page
1. S
2. S
With the first condition, adaptation to small signals can be avoided. The second condition
avoids adaptation during double talk. The parameter DeltaP
Preliminary Data Sheet
S
LEC,R
LEC,R
LEC, TIN
31.
207). Adaptation takes place only if both of the following conditions hold:
> Pow
– S
Line Echo Cancellation in DuSLIC-E/-E2/-P
LEC,TIN
Line Echo Cancellation Unit Block Diagram
LECR
> DeltaP
Shadow
Filter
FIR
LEC
(Delta Power) and DeltaQ (Delta Quality)
LEC
Coeff.
Adapt
Chapter
63
2.8.6.
Coeff.
Copy
LEC
Filter
Functional Description
represents the echo loss
FIR
S
DuSLIC_0004_LECunit
LECR
LEC,R
(“POP Command”
(Power Detection
S
DS3, 2003-07-11
LEC, TOUT
DuSLIC