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LXT388LE Datasheet

  • LXT388LE

  • PCM TRANSCEIVER|DUAL|CEPT PCM-30/E-1|CMOS|QFP|100PIN|PLASTIC

  • 78頁(yè)

  • ETC

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LXT388
Dual T1/E1/J1 Transceiver
Datasheet
The LXT388 is a dual short haul Pulse Code Modulation (PCM) transceiver for use in both
1.544 Mbps (T1) and 2.048 Mbps (E1) applications. It incorporates four receivers and two
transmitters in a single LQFP-100 package.
The transmit drivers provide low impedance independent of the transmit pattern and supply
voltage variations. The LXT388 transmits shaped waveforms meeting G.703 and T1.102
specifications. The LXT388 meets the latest transmit return loss specifications, such as ETSI
ETS-300166.
The LXT388 differential receivers provide high noise margin for T1/E1 short-haul operation. In
addition, the LXT388 includes two extra receiver/jitter attenuation blocks that can be used for
Driver Performance Monitoring (DPM) in the active channels. These blocks can also be used to
provide jitter attenuation in the receive and transmit paths simultaneously.
Jitter attenuation performance meets the latest international specifications such as CTR12/13.
The jitter attenuator was optimized for Synchronous Optical NETwork/Synchronous Digital
Hierarchy (SONET/SDH) applications including a 32/64 bit FIFO and a second order DPLL.
The LXT388 includes Intel
餂?/div>
Hitless Protection Switching (Intel
餂?/div>
HPS) feature which helps
increase quality of service and eliminates relays in redundancy and 1+1 protection applications.
Fast tristate-able drivers and a constant delay jitter attenuator are critical to achieving Intel
餂?/div>
HPS.
Applications
s
s
s
SONET/SDH tributary interfaces
Digital cross connects
Public/private switching trunk line
interfaces
s
s
Microwave transmission systems
M13, E1-E3 MUX
Product Features
s
s
s
s
Driver Performance Monitor (DPM)
Tx and Rx Jitter Attenuator
Single rail 3.3V supply with 5V tolerant
inputs
Superior crystal-less jitter attenuator
鈥?Meets ETSI CTR12/13, ITU G.736,
G.742, G.823 and AT&T Pub 62411
specifications
鈥?Optimized for SONET/SDH
applications, meets ITU G.783 mapping
jitter specification
鈥?Constant throughput delay jitter
attenuator
s
s
s
s
s
s
s
Intel
餂?/div>
HPS for 1 to 1 protection without
relays
HDB3, B8ZS, or AMI line encoder/decoder
Analog/digital and remote loopback testing
functions
LOS per ITU G.775, ETS 300 233 and
T1.231
JTAG Boundary Scan test port per IEEE
1149.1
100 pin LQFP package
Low power consumption of 150mW per
channel (typical)
As of January 15, 2001, this document replaces the Level One document
LXT388 鈥?Dual T1/E1/J1 Transceiver.
Order Number:
249269-002
February 2001

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