DJLXT384LE Intel, DJLXT384LE Datasheet - Page 13
DJLXT384LE
Manufacturer Part Number
DJLXT384LE
Description
Manufacturer
Intel
Datasheet
1.DJLXT384LE.pdf
(140 pages)
Specifications of DJLXT384LE
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2.0
Document Number: 248994
Revision Number: 005
Revision Date: November 28, 2005
Product Summary
The Intel
Attenuation (called hereafter the LXT384 transceiver) is designed for use in 1.544 MBps (T1) or
2.048-Mbps (E1) applications. It incorporates eight independent receivers and eight independent
transmitters in either a single 144-pin LQFP or a 160-ball PBGA package.
Transmitters. The LXT384 transceiver transmits shaped waveforms that meet ITU G.703
specifications. The transmit drivers provide low impedance, independent of supply-voltage
variation and transmit patterns. The output of the transmitters is stable over a variety of loads. The
transmit return loss for the LXT384 transceiver exceeds typical specifications such as ETSI ETS
300 166. All transmitters have a power-down mode with the capability for a fast transition to an
output high-impedance tristate.
Power Savings. The Intel
LXT384 Transceiver in a broad range of applications, while maintaining circuit stability. As a
result, the LXT384 Transceiver can offer a low-current transmit output option that can reduce
power dissipation by up to 15%. By changing the LXT384 Transceiver output transformer ratio
from 1:2 to 1:1.7, the savings occur whether TVCC is at 5V or 3.3V.
Receivers. The LXT384 Transceiver has a differential receiver architecture that provides a high
noise-interference margin so that the receivers can operate well beyond 12 dB of cable attenuation.
Jitter Attenuation. The LXT384 Transceiver incorporates a crystal-less jitter attenuator that can
be switched to work inside either the receive or the transmit path, or it can be disabled entirely. The
jitter-attenuation performance, optimized for synchronous digital hierarchy (SDH) applications,
meets typical international specifications such as ETSI CTR12/13.
Performance Monitoring. You can configure the LXT384 Transceiver for non-intrusive
performance monitoring (also known as ‘protected monitoring’) that is compliant with ITU G.772.
Intel
Protection Switching mode, which uses one transceiver to back up another, in case the primary
transceiver fails. This method is often referred to as 1+1 redundancy protection. Typical
redundancy methods used external relays. Intel
solution, which reduces bit errors that can occur when using external relays for redundancy
protection. This mode uses two LXT384 Transceivers in parallel, with one LXT384 Transceiver
powered on, while the other LXT384 Transceiver is in standby mode. As a result, one LXT384
Transceiver backs up another LXT384 Transceiver. See the 1+1 Protection without Relays Using
Intel
®
®
LXT380/1/4/6/8 Hitless Protection Switching - Application Note.
Hitless Protection Switching. The LXT384 Transceiver can operate in an Intel
®
LXT384 Octal T1/E1/J1 Short-Haul Pulse-Code Modulation Transceiver with Jitter
®
transmit output design allows you to use the transmitter output of the
Intel
®
LXT384 Octal T1/E1/J1 S/H PCM Transceiver with JA
®
Hitless Protection Switching is a solid-state
®
Hitless
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