PXB4220E-V32 Infineon Technologies, PXB4220E-V32 Datasheet - Page 19
PXB4220E-V32
Manufacturer Part Number
PXB4220E-V32
Description
IC CHIPSET 8 E1/T1 LINE 256-BGA
Manufacturer
Infineon Technologies
Datasheet
1.PXB4220E-V33.pdf
(290 pages)
Specifications of PXB4220E-V32
Applications
*
Interface
*
Voltage - Supply
*
Package / Case
256-BGA
Mounting Type
Surface Mount
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
PXB4220E-V32
PXB4220E-V32IN
PXB4220E-V32IN
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1.3.1
Figure 3
environment. Two Infineon Quad Framer and Line Interface Component (QuadFALC,
PEB 22554) chips are connected at the PCM ports. An ATM Layer circuit is connected
at the UTOPIA Interface port and could be implemented using Infineon PXB 4350 ATM
Layer Processor (ALP) chip.
Figure 3
External synchronous SRAM is always required for proper IWE8 operation. The IWE8
requires only one main operating clock of 12 times the data rate of one port. An
emergency clock of 32.768 MHz is optional. The Framer and Utopia interface clocks can
be completely asynchronous with respect to the main clock. A microprocessor controls
and operates the IWE8 via a generic 16-bit interface.
1.3.2
In communication links reflections resulting in an electrical echo are due to hybrid splits
or imperfect terminations in subscriber loops. Acoustical echoes may occur due to poor
isolation of microphone and speaker of some telephone systems. These electrical and
acoustical echoes disturb the quality of the transmission. To ensure high quality, pure
data transmission the ITU-T suggests in the recommendation G.131 [22] the use of echo
cancellers. Echo cancellation is extremely desirable for data links with total round trip
transmission times of more than 50 ms.
Data Sheet
T1/E1
Lines
shows an example Line Interface Card (LIC) utilizing the IWE8 in a switch
Mag.
Mag.
Line Card
Echo Canceller
Line Card for 8 T1/E1 Channels
PEB 22554
PEB 22554
QuadFALC
QuadFALC
Interface
Serial
64 K x 36 Bit
FT SSRAM
IWE8
19
PXB 4219E, PXB 4220E, PXB 4221E
Interface
UTOPIA
Clock = 25 MHz
Clock Supply
ATM Layer
PXB 4350
e.g. ALP
Circuit
Switching
Network
IWE8, V3.4
2003-01-20
Overview
Lcf8tc
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