PEB2256H-V12 Infineon Technologies, PEB2256H-V12 Datasheet - Page 96
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PEB2256H-V12
Manufacturer Part Number
PEB2256H-V12
Description
IC INTERFACE LINE 3.3V 80-MQFP
Manufacturer
Infineon Technologies
Datasheet
1.PEB2256H-V12.pdf
(490 pages)
Specifications of PEB2256H-V12
Applications
*
Interface
*
Voltage - Supply
*
Package / Case
80-SQFP
Mounting Type
Surface Mount
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
PEB2256H-V12
PEB2256H-V12IN
PEB2256H-V12IN
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PEB2256H-V12
Manufacturer:
Infineon Technologies
Quantity:
10 000
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FALC56 V1.2
PEB 2256
Functional Description E1
4.4.3
Transmit Jitter Attenuator (E1)
The transmit jitter attenuator DCO-X circuitry generates a "jitter-free" transmit clock and
meets the following requirements: ITU-T I.431, G. 703, G. 736 to 739, G.823 and ETSI
TBR12/13. The DCO-X circuitry works internally with the same high frequency clock as
the receive jitter attenuator. It synchronizes either to the working clock of the transmit
backplane interface or the clock provided on pin TCLK or the receive clock RCLK
(remote loop/loop-timed). The DCO-X attenuates the incoming clock jitter starting at
2 Hz with 20 dB per decade fall-off. With the jitter attenuated clock, which is directly
depending on the phase difference of the incoming clock and the jitter attenuated clock,
data is read from the transmit elastic buffer (2 frames) or from the JATT buffer (2 frames,
remote loop). Wander with a jitter frequency below 2 Hz is passed transparently.
The DCO-X accepts gapped clocks which are used in ATM or SDH/SONET applications.
The jitter attenuated clock is output on pin XCLK or optionally on pin CLK2.
In case of missing clock on pin SCLKX the DCO-X centers automatically, if selected by
bit CMR2.DCOXC = 1.
The transmit jitter attenuator can be disabled. In that case data is read from the transmit
elastic buffer with the clock sourced on pin TCLK (2.048 or 8.192 MHz). Synchronization
between SCLKX and TCLK has to be done externally.
In the loop-timed clock configuration (LIM2.ELT) the DCO-X circuitry generates a
transmit clock which is frequency synchronized on RCLK. In this configuration the
transmit elastic buffer has to be enabled.
Data Sheet
96
2002-08-27
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