参数资料
| 型号： | XRT83VSH38IB |
| 厂商： | Exar Corporation |
| 文件页数： | 27/76页 |
| 文件大小： | 0K |
| 描述： | IC LIU SH T1/E1/J1 8CH 225BGA |
| 标准包装： | 84 |
| 类型： | 线路接口装置（LIU） |
| 驱动器/接收器数： | 8/8 |
| 规程： | T1，E1，J1 |
| 电源电压： | 3.14 V ~ 3.47 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 225-BGA |
| 供应商设备封装： | 225-BGA（19x19） |
| 包装： | 托盘 |
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XRT83VSH38
30
REV. 1.1.0
8-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT
FIGURE 19. SIMPLIFIED BLOCK DIAGRAM OF THE ATAOS FUNCTION
4.5.2
QRSS/PRBS Generation
The XRT83VSH38 can transmit a QRSS/PRBS random sequence to a remote location from TTIP/TRING. The
polynomial is shown in Table 10.
4.5.3
T1 Short Haul Line Build Out (LBO)
The short haul transmitter output pulses are generated using a 7-Bit internal DAC (6-Bit plus the MSB sign bit).
The line build out can be set to interface to five different ranges of cable attenuation by programming the
appropriate channel register. The pulse shape is divided into eight discrete time segments which are set to
fixed values to comply with the pulse template. To program the eight segments individually to optimize a
special line build out, see the arbitrary pulse section of this datasheet. The short haul LBO settings are shown
in Table 11.
4.5.4
Arbitrary Pulse Generator For T1 and E1
The arbitrary pulse generator divides the pulse into eight individual segments. Each segment is set by a 7-Bit
binary word by programming the appropriate channel register. This allows the system designer to set the
overshoot, amplitude, and undershoot for a unique line build out. The MSB (bit 7) is a sign-bit. If the sign-bit is
set to "0", the segment will move in a positive direction relative to a flat line (zero) condition. If this sign-bit is
set to "1", the segment will move in a negative direction relative to a flat line condition. The resolution of the
DAC is typically 45mV per LSB. Thus, writing 7-bit = 1111111 will clamp the output at either voltage rail
corresponding to a maximum amplitude. A pulse with numbered segments is shown in Figure 20.
TABLE 10: RANDOM BIT SEQUENCE POLYNOMIALS
RANDOM PATTERN
T1
E1
QRSS
220 - 1
PRBS
215 - 1
TABLE 11: SHORT HAUL LINE BUILD OUT
LBO SETTING EQC[4:0]
RANGE OF CABLE ATTENUATION
08h (01000)
0 - 133 Feet
09h (01001)
133 - 266 Feet
0Ah (01010)
266 - 399 Feet
0Bh (01011)
399 - 533 Feet
0Ch (01100)
533 - 655 Feet
RLOS
ATAOS
TAOS
TTIP
TRING
Tx
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相关代理商/技术参数 |
参数描述 |
|---|---|
| XRT83VSH38IB-F | 功能描述:外围驱动器与原件 - PCI 8 Channel Short-Haul RoHS:否 制造商:PLX Technology 工作电源电压: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:FCBGA-1156 封装:Tray |
| XRT83VSH38IB-F | 制造商:Exar Corporation 功能描述:T1/E1 LIU IC |
| XRT84L38 | 制造商:EXAR 制造商全称:EXAR 功能描述:OCTAL T1/E1/J1 FRAMER |
| XRT84L38_06 | 制造商:EXAR 制造商全称:EXAR 功能描述:OCTAL T1/E1/J1 FRAMER |
| XRT84L38IB | 功能描述:网络控制器与处理器 IC 8 Ch T1/E1 Framer RoHS:否 制造商:Micrel 产品:Controller Area Network (CAN) 收发器数量: 数据速率: 电源电流（最大值）:595 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:PBGA-400 封装:Tray |
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