PSB21473FV13XT Infineon Technologies, PSB21473FV13XT Datasheet - Page 376

• Manufacturer Part Number: PSB21473FV13XT
• Manufacturer: Infineon Technologies

Specifications of PSB21473FV13XT

• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (min): 3.135V
• Operating Supply Voltage (max): 3.6V
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 144
• Lead Free Status / RoHS Status: Compliant

Data Sheet
20.1.1.1 Echo Cancellation Unit
The echo cancellation unit has two operating modes: fullband and subband mode. Table
20-2 shows the basic differences of the two modes. The two modi are described in the
sequel.
Table 20-2
max. G
echo length
delay
The selection between the modes is performed with the parameter QU as summarized
in table 20-3. The different modi are described in the sequel.
Table 20-3
20.1.1.2 Echo Cancellation (Fullband Mode)
A simplified block diagram of the fullband echo cancellation unit is shown in figure 20-5.
QU
0
0
0
0
1
1
1
1
2
c
QU
0
0
1
1
0
0
1
1
Echo Cancellation Modes
AEC Mode (QU) Encoding
1
QU
0
1
0
1
0
1
0
1
0
fullband mode
20 dB
16-96 ms
1-2 ms
Acoustic Echo Cancellation Modes
Echo cancellation disabled (half duplex)
reserved
Fullband mode one (similar to PSB 2170 Version 1.1)
Fullband mode two
Subband, reduced filter length (car kit application)
Subband, analog line mode
Subband, ISDN mode
Subband, enhanced mode
376
subband mode
30 dB
>50-159 ms
35 ms
Digital Signal Processor
PSB 21473
2003-03-31
INCA-D