XRT83L314 14-Channel T1/E1/J1 Long-Haul, Short-Haul LIU with JA & CDR
The XRT83L314 is a fully integrated 14-channel long-haul and short-haul line interface unit (LIU) that operates from a single 3.3V power supply. Using internal termination, the LIU provides one bill of materials to operate in T1, E1, or J1 mode independently on a per channel basis with minimum external components. The LIU features are programmed through a standard 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 T1/E1/J1 clock rates from a selectable external clock frequency and has five output clock references that can be used for external timing (8kHz, 1.544Mhz, 2.048Mhz, nxT1/J1, nxE1).
技术特性
- Fully integrated 14-Channel short haul and long haul transceivers for T1/J1 (1.544MHz) and E1 (2.048MHz) applications
- T1/E1/J1 short haul, long haul, and clock rate are per port selectable through software without changing components
- Internal Impedance matching on both receive and transmit for 75Ω (E1), 100Ω (T1), 110Ω (J1), 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
- Five pre-programmed transmit pulse settings for T1 short haul applications, as well as an arbitrary programmable waveform generator for custom transmit pulse shaping per channel
- Arbitrary pulse generator for T1 short haul and T1 long haul modes per channel
- Transmit line build outs (LBO) for T1 long haul applications from 0dB to -22.5dB in three -7.5dB steps on a per channel basis
- On-Chip transmit short-circuit protection and limiting protects line drivers from damage on a per channel basis
- Independent Crystal-Less digital jitter attenuators (JA) with 32-Bit or 64-Bit FIFO for the receive and transmit paths
- On-Chip frequency multiplier generates T1 or E1 master clocks from a variety of external clock sources (8, 16, 56, 64, 128, 256kHz and 1X, 2X, 4X, 8X T1 or E1)
- 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
- Selectable receiver sensitivity from 0 to 36dB cable loss in T1 @ 772kHz, and 0 to 43dB cable loss in E1 @ 1,024kHz
- Receive monitor mode handles 0 to 29dB resistive attenuation (flat loss) along with 0 to 6dB cable loss for both T1 and E1
- Receiver line attenuation indication output in 1dB steps
- Loss of signal (RLOS) according to ITU-T G.775/ETS300233 (E1) and ANSI T1.403 (T1/J1)
- Programmable receive slicer threshold (45%, 50%, 55%, or 68%) for improved receiver interference immunity
- Programmable data stream muting upon RLOS detection
- On-Chip HDB3/B8ZS encoder/decoder with an internal 16-bit LCV counter for each channel
- On-Chip digital clock recovery circuit for high input jitter tolerance
- QRSS pattern generator and detection for testing and monitoring
- Error and bipolar violation insertion and detection
- Transmit all ones (TAOS) and in-band network loop up and loop down code generation
- Automatic loop code detection for remote loopback activation
- Supports local analog, remote, digital, and dual loopback modes
- Low Power dissipation: 170mW per channel (50% density)
- 250mW per channel maximum power dissipation (100% density)
- Single 3.3V supply operation (3V to 5V I/O tolerant)
- 304-Pin TBGA package
- -40°C to +85°C Temperature Range
- Supports gapped clocks for mapper/multiplexer applications
- Pb-Free, RoHS Compliant Versions Offered
应用领域 APPLICATION
- T1 Digital Cross Connects (DSX-1)
- ISDN Primary Rate Interface
- CSU/DSU E1/T1/J1 Interface
- T1/E1/J1 LAN/WAN Routers
- Public Switching Systems and PBX Interfaces
- T1/E1/J1 Multiplexer and Channel Banks
- Integrated Multi-Service Access Platforms (IMAPs)
- Integrated Access Devices (IADs)
- Inverse Multiplexing for ATM (IMA)
- Wireless Base Stations
|
技术指标
| 频道数量 |
8 |
| 数据传输速率(s) |
T1/E1/J1 |
| Clk Rec |
是 |
| 短途/长途 |
S/L |
| 温度.范围 |
Ind |
| OpPwr Sup/Max Cur |
3.3V +/-5% |
| 封装 |
BGA–225 |
| Recommended |
订购信息 Ordering Information
| 器件型号 |
有害物质限制 |
最低温度 |
最高温度 |
状态 |
立刻购买 |
申请样片 |
| XRT83L314IB-L |
|
-40 |
85 |
Active |
|
|
| XRT83L314IB |
|
-40 |
85 |
Active |
|
