XRT83VSH28：8-Channel E1 Short-Haul Line Interface Unit with JA & CDR
The XRT83VSH28 is a fully integrated 8-channel short-haul line interface unit (LIU) that operates from a 1.8V and a 3.3V power supply. Using internal termination, the LIU provides one bill of materials to operate in E1 75? or 120? mode with minimum external components. The LIU features are programmed through a standard parallel or serial microprocessor interface. EXAR's LIU has patented high impedance circuits that allow the transmitter outputs and receiver inputs to be high impedance when experiencing a power failure or when the LIU is powered off. Key design features within the LIU optimize 1:1 or 1+1 redundancy and non-intrusive monitoring applications to ensure reliability without using relays.
The on-chip clock synthesizer generates an E1 clock reference.
Additional features include RLOS, a 16-bit LCV counter for each channel, AIS, QRSS generation/detection, TAOS, DMO, and diagnostic loopback modes.
技术特性- Fully integrated eight channel short-haul transceivers for E1 (2.048MHz) applications
- Internal Impedance matching on both receive and transmit for 75Ω (E1) and 120Ω (E1) applications are per port selectable through software without changing components
- Power down on a per channel basis with independent receive and transmit selection
- User programable Arbitrary Pulse mode
- On-Chip transmit short-circuit protection and limiting protects line drivers from damage on a per channel basis
- Selectable Crystal-Less digital jitter attenuators (JA) with 32-Bit or 64-Bit FIFO for the receive or transmit path
- Driver failure monitor output (DMO) alerts of possible system or external component problems
- Transmit outputs and receive inputs may be "High" impedance for protection or redundancy applications on a per channel basis
- Support for automatic protection switching
- 1:1 and 1+1 protection without relays
- Receive monitor mode handles 0 to 6dB resistive attenuation (flat loss) along with 0 to 6dB cable loss
- Loss of signal (RLOS) according to ITU-T G.775/ETS300233 (E1)
- Programmable data stream muting upon RLOS detection
- On-Chip HDB3 encoder/decoder with an internal 16-bit LCV counter for each channel
- On-Chip digital clock recovery circuit for high input jitter tolerance
- QRSS/PRBS pattern generator and detection for testing and monitoring
- Error and bipolar violation insertion and detection
- Transmit all ones (TAOS) Generators and Detectors
- Supports local analog, remote, digital, and dual loopback modes
- Supports gapped clocks for mapper/multiplexer applications
- 1.8V Inner Core
- 3.3V I/O Supply Operation
- 225 ball BGA package
- -40°C to +85°C 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- ISDN Primary Rate Interface
- CSU/DSU E1 Interface
- E1 LAN/WAN Routers
- Public switching Systems and PBX Interfaces
- E1 Multiplexer and Channel Banks
| 规格 | 参数 | | 频道数量 | 8 | | 数据传输速率(s) | E1 | | Clk Rec | Yes | | 短途/长途 | S | | Op Pwr Sup/ Max Cur | 3.3V ±5%, TBD | | 封装 | BGA-225 | | Recommended | |
|
订购型号
| 器件型号 | 封装编码 | 最低温度 | 最高温度 | 状态 |
|---|
| XRT83VSH28IB | PBGA225 | -40 | 85 | EOL |
| XRT83VSH28IB-F | PBGA225 | -40 | 85 | Active |
