XRT75L02：2-Channel E3/DS3/STS-1 Line Interface Unit with Jitter Attenuator
The XRT75L02 is a two-channel fully integrated Line Interface Unit (LIU) with Jitter Attenuator for E3/DS3/STS-1 applications. It incorporates independent Receivers, Transmitters and Jitter Attenuators in a single 100-pin TQFP package.
The device can be configured to operate in either E3 (34.368 MHz), DS3 (44.736 MHz) or STS-1 (51.84 MHz) modes.The transmitter can be turned off (tri-stated) for redundancy support and for conserving power.
Its differential receiver provides high noise interference margin and is able to receive the data over 1000 feet of cable or with up to 12 dB of cable attenuation.
The XRT75L02 incorporates advanced crystal-less jitter attenuators that can be selected either in the transmit or receive path. The jitter attenuator performance meets the ETSI TBR-24 and Bellcore GR-499 specifications.
The device provides both Serial Microprocessor Interface as well as Hardware mode for programming and control.
It supports local, remote and digital loop-backs. The XRT75L02 also contains an on-board Pseudo Random Binary Sequence (PRBS) generator and detector with the ability to insert and detect single bit error.
技术特性- On chip Clock and Data Recovery circuit for high input jitter tolerance
- Meets the jitter tolerance requirements as specified in ITU-T G.823_1993 for E3 and Telcordia GR-499-CORE for DS3 applications
- Detects and Clears LOS as per G.775
- Receiver Monitor mode handles up to 20 dB flat loss with 6 dB cable attenuation
- On chip B3ZS/HDB3 encoder and decoder that can either be enabled or disabled
- On-chip clock synthesizer generates the appropriate rate clock from a single frequency XTAL
- Provides low jitter clock outputs for either DS3, E3 or STS-1 rates
- On-chip clock synthesizer provides the appropriate rate clock from a single 12.288 MHz Clock
- Provides low jitter output clock
- Compliant with Bellcore GR-499, GR-253 and ANSI T1.102 Specification for transmit pulse
- Tri-state Transmit output capability for redundancy applications
- Transmitters can be turned on or off
- On chip advanced crystal-less Jitter Attenuator
- Jitter Attenuator can be selected in Receive or Transmit paths
- 16 or 32 bits selectable FIFO size
- Meets the Jitter and Wander specifications described in T1.105.03b,ETSI TBR-24, Bellcore GR-253 and GR-499 standards
- Jitter Attenuators can be disabled
- 5 wire Serial Microprocessor Interface for control and configuration
- Supports optional internal Transmit Driver Monitoring
- PRBS error counter register to accumulate errors
- Hardware Mode for control and configuration
- Supports Local, Remote and Digital Loop-backs
- Single 3.3 V ± 5% power supply
- 5 V Tolerant I/O
- Available in 100-pin TQFP
- -40°C to 85°C Industrial Temperature Range
- Pb-Free, RoHS Compliant Versions Offered
数据手册S应用指南电路图Product Change Notification | 产品应用- E3/DS3 Access Equipment
- STS1-SPE to DS3 Mapper
- DSLAMs
- Digital Cross Connect Systems
- CSU/DSU Equipment
- Routers
- Fiber Optic Terminals
| 规格 | 参数 | | 频道数量 | 2 | | 数据传输速率(s) | DS3, E3, STS-1 | | Clk Rec | Yes | | 短途/长途 | n/a | | 温度.范围 | Ind. | | Op Pwr Sup/ Max Cur | 3V ±5% | | 封装 | TQFP-100 | | Recommended | |
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订购型号
| 器件型号 | 封装编码 | 最低温度 | 最高温度 | 状态 |
|---|
| XRT75L02IV-F | TQFP100 | -40 | 85 | Active |
| XRT75L02IVTR-F | TQFP100 | -40 | 85 | EOL |
