PEB2245N-V12 Infineon Technologies, PEB2245N-V12 Datasheet - Page 15

• Manufacturer Part Number: PEB2245N-V12
• Description: IC SWITCHING/CONFER MULTI 44PLCC
• Manufacturer: Infineon Technologies
• Series: MUSAC™r

Specifications of PEB2245N-V12

• Function: Multipoint Switching and Conferencing
• Interface: PCM
• Voltage - Supply: 5V
• Current - Supply: 12mA
• Power (watts): 100mW
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 44-PLCC
• Includes: Clock Shift, Space Switch Mode, Time and Space Switch, Tristate Function
• Lead Free Status / RoHS Status: Request inventory verification / Request inventory verification
• Number Of Circuits: -
• Other names: PEB2245N-V12; PEB2245N-V12IN

PEB 2245
1.6
System Integration
Conferencing
The MUSAC is designed to connect any of the 512 PCM-input channels to any of 256 output
channels. Any input channel up to a total number of 64 can be handled in 21 independent
conferences simultaneously. Any conference combination from 3 subscribers in 21 conferences up
to 64 subscribers in only one conference is possible. In order to ensure an acceptable speech
quality and to reduce echo and “singing” problems, the input channels can be attenuated
individually by 0, – 3 dB, – 6 dB or – 9 dB and the output channels by 0 or – 3 dB; additionally, input
signals below a threshold programmable to four different levels are disregarded.
To lessen the risk of instability in multiparty conferences the voice signal from every second channel
can be inverted so that disturbance signals in odd and even channels are subtracted from one
another.
If more capacity is needed, several devices can be connected. By connecting the 16 PCM-input
lines in parallel to two MUSACs, a nonblocking switching matrix for 512 subscribers can be
implemented: 128 input channels can be selected for up to 42 independent, simultaneous
conferences. Figure 6 shows such an arrangement. Due to the tristate capability of the MUSAC
larger switches with conferencing capability can be easily formed.
Figure 6
Memory Time Switch 16/16 for a Non-Blocking 512-Channel Switch with
Conferencing Capability
Semiconductor Group
15