WJLXT385LE.B1 Cortina Systems Inc, WJLXT385LE.B1 Datasheet - Page 19

• Manufacturer Part Number: WJLXT385LE.B1
• Manufacturer: Cortina Systems Inc

Specifications of WJLXT385LE.B1

• Lead Free Status / RoHS Status: Supplier Unconfirmed

2.0
Document Number: 249252
Revision Number: 006
Revision Date: 19-Jan-2006
Product Summary
The LXT385 Transceiver is designed for use in 2.048-Mbps 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 LXT385 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 LXT385 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
LXT385 ransceiver in a broad range of applications, while maintaining circuit stability. As a result,
the LXT385 ransceiver can offer a low-current transmit output option that can reduce power
dissipation by up to 15%. By changing the LXT385 ransceiver output transformer ratio from 1:2 to
1:1.7, the savings occur whether TVCC is at 5V or 3.3V.
Receivers. The LXT385ransceiver 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 LXT385ransceiver 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 LXT385ransceiver 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 LXT385ransceivers in parallel, with one LXT385ransceiver
powered on, while the other LXT385ransceiver is in standby mode. As a result, one
LXT385ransceiver backs up another LXT385ransceiver. See the 1+1 Protection without Relays
Using Intel
®
Hitless Protection Switching. The LXT385ransceiver can operate in an Intel
®
LXT380/1/4/6/8 Hitless Protection Switching - Application Note.
®
transmit output design allows you to use the transmitter output of the
Intel
®
®
LXT385 Octal E1 S/H PCM Transceiver with JA
Hitless Protection Switching is a solid-state
®
Hitless
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