PEF 20954 HT V1.1 Infineon Technologies, PEF 20954 HT V1.1 Datasheet - Page 18

• Manufacturer Part Number: PEF 20954 HT V1.1
• Description: IC ECHO CANCELLER DGTL TQFP144
• Manufacturer: Infineon Technologies

Specifications of PEF 20954 HT V1.1

• Function: Smart Integrated Digital Echo Canceller (SIDEC)
• Interface: PCM, Serial, UCC
• Number Of Circuits: 1
• Voltage - Supply: 3 V ~ 3.6 V
• Current - Supply: 350mA
• Power (watts): 900mW
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 144-LFQFP
• Includes: Double Talk Detection
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: PEF20954HTV1.1; SP000007505

Figure 4
SIDEC can be used in a PBX or Central Office (CO) to cancel the echo next to the
customer side (near end echo). The echo delay is kept short. The delay for this
application is usually less than 64ms and the SIDEC can cancel up to 32 channels.
Figure 4
the other side analog phones are connected.
A possible INFINEON solution with the SICOFI (includes D/A and A/D conversion) and
the SLIC (hybrid) to connect the analog phone is shown above.
Data Sheet
POTS
POTS
POTS
POTS
POTS
POTS
PBX:
SLICOFI:
shows a PBX with a T1/E1 interface FALC LH to the CO on the one side. On
Echo
SIDEC in a Private Branch Exchange (PBX)
2 wires
Private Branch eXchange
Signal Processing with integrated Subscriber
Line Interface Circuit Codec Filter
SLIC
SLIC
SLIC
SLIC
SLIC
SLIC
HV-
HV-
HV-
HV-
HV-
HV-
4 wires
(CODEC)
PEB 3065
PEB 3065
SLICOFI
SLICOFI
(CODEC)
IOM-2
18
PEB 2055
EPIC
PBX
EPIC:
POTS:
FALC:
Extended PCM Interface Controller
Plain Old Telephone Service
Frame and Line Interface Component
PCM30
SIDEC
FALC
PEB 2256
56
PCM30
Rev. 2, 2004-07-28
Introduction
PEB 20954
PEF 20954
SIDEC in a PBX
E1/T1