- 您现在的位置：买卖IC网 > PDF目录9756 > DS26303L-75+A3 (Maxim Integrated Products)IC LIU E1/T1/J1 3.3V 144-ELQFP PDF资料下载
参数资料
| 型号： | DS26303L-75+A3 |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 59/101页 |
| 文件大小： | 0K |
| 描述： | IC LIU E1/T1/J1 3.3V 144-ELQFP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 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： | 3.135 V ~ 3.465 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 144-LQFP 裸露焊盘 |
| 供应商设备封装： | 144-LQFP 裸露焊盘 |
| 包装： | 托盘 |
| 其它名称： | 90-26303+7A3 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页当前第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页第71页第72页第73页第74页第75页第76页第77页第78页第79页第80页第81页第82页第83页第84页第85页第86页第87页第88页第89页第90页第91页第92页第93页第94页第95页第96页第97页第98页第99页第100页第101页
DS26303: 3.3V, T1/E1/J1, Short-Haul, Octal Line Interface Unit
60 of 101
6.4.3
Loss of Signal
The DS26303 uses both the digital and analog loss-detection method in compliance with the latest ANSI T1.231 for
T1/J1 and ITU-T G.775 (LASCS.LASCSn reset) or ETS 300 233 (LASCS.LASCSn set) for E1 mode of operation.
LOS is detected if the receiver level falls bellow a threshold analog voltage for a certain duration. Alternatively, this
can be termed as having received zeros for a certain duration. The signal level and timing duration are defined in
accordance with the T1.231, G.775, or ETS 300 233 specifications.
The loss-detection thresholds are based on cable loss of 15dB for both T1 and E1 mode. RCLKn is replaced by
MCLK when the receiver detects a loss of signal. If the AISEL bit is set in the GC register, or if the IAISEL.ILAISE
bit is set, the RPOSn/RNEGn data is replaced by an all-ones signal upon receiving an LOS to indicate AIS to the
downstream device. The loss state is exited when the receiver detects a certain number of ones density at a higher
signal level than the loss-detection level. The loss-detection-signal level and loss-reset-signal level are defined with
a hysteresis to prevent the receiver from bouncing between LOS and no-LOS states.
The following table outlines the specifications governing the loss function.
Table 6-5. Loss Criteria T1.231, G.775, and ETS 300 233 Specifications
STANDARD
CRITERIA
ANSI T1.231
ITU-T G.775
ETS 300 233
Loss
Detection
No pulses are detected for 175
±75 bits.
No pulses are detected for
duration of 10 to 255 bit
periods.
No pulses are detected for a
duration of 2048 bit periods or
1ms,
Loss Reset
Loss is terminated if a duration of
12.5% ones are detected over
duration of 175 ±75 bits. Loss is
not terminated if eight consecutive
0s are found if B8ZS encoding is
used. If B8ZS is not used, loss is
not terminated if 100 consecutive
pulses are 0.
The incoming signal has
transitions for duration of 10
to 255 bit periods.
Loss reset criteria is not
defined.
6.4.3.1
ANSI T1.231 for T1 and J1 Modes
Loss is detected if the received signal level is typically less than 200mV for duration of 192 bit periods. LOS is reset
if the all of the following criteria are met:
24 or more 1s are detected in a 192-bit period with a detection threshold of 300mV measured
at RTIPn and RRINGn.
During the 192 bits less than 100 consecutive zeros are detected.
Eight consecutive 0s are not detected if B8ZS is set.
6.4.3.2
ITU-T G.775 for E1 Modes
LOS is detected if the received signal level is typically less than 200mV for a continuous duration of 192 bit periods.
LOS is reset if the receive signal level is typically greater than 300mV for a duration of 192 bit periods.
6.4.3.3
ETS 300 233 for E1 Modes
LOS is detected if the received signal level is typically less than 200mV for a continuous duration of 2048 (1ms) bit
periods. LOS is reset if the receive signal level is typically greater than 300mV for a duration of 192 bit periods.
6.4.4
AIS
Table 6-6 outlines the DS26303 AIS-related specifications. Table 6-7 states the AIS functionality in the DS26303.
The registers related to the AIS detection are shown in Table 6-8.
相关PDF资料 |
PDF描述 |
|---|---|
| MS27474E14B15P | CONN RCPT 15POS JAM NUT W/PINS |
| D38999/26FH55PA | CONN PLUG 55POS STRAIGHT W/PINS |
| MS27473T20F41PA | CONN PLUG 41POS STRAIGHT W/PINS |
| VI-24J-MX-F1 | CONVERTER MOD DC/DC 36V 75W |
| HI5812JIBZ | ADC 12BIT 50KSPS 1.5LSB 24-SOIC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS26303LN-120 | 功能描述:电信线路管理 IC RoHS:否 制造商:STMicroelectronics 产品:PHY 接口类型:UART 电源电压-最大:18 V 电源电压-最小:8 V 电源电流:30 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:VFQFPN-48 封装:Tray |
| DS26303LN-120+ | 功能描述:电信线路管理 IC 3.3V E1/T1/J1 Short Haul Octal LIU RoHS:否 制造商:STMicroelectronics 产品:PHY 接口类型:UART 电源电压-最大:18 V 电源电压-最小:8 V 电源电流:30 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:VFQFPN-48 封装:Tray |
| DS26303LN-120+A3 | 功能描述:电信线路管理 IC 3.3V E1/T1/J1 Short Haul Octal LIU RoHS:否 制造商:STMicroelectronics 产品:PHY 接口类型:UART 电源电压-最大:18 V 电源电压-最小:8 V 电源电流:30 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:VFQFPN-48 封装:Tray |
| DS26303LN-120A3 | 功能描述:电信线路管理 IC 3.3V E1/T1/J1 Short Haul Octal LIU RoHS:否 制造商:STMicroelectronics 产品:PHY 接口类型:UART 电源电压-最大:18 V 电源电压-最小:8 V 电源电流:30 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:VFQFPN-48 封装:Tray |
| DS26303LN-75 | 功能描述:电信线路管理 IC 3.3V E1/T1/J1 Short Haul Octal LIU RoHS:否 制造商:STMicroelectronics 产品:PHY 接口类型:UART 电源电压-最大:18 V 电源电压-最小:8 V 电源电流:30 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:VFQFPN-48 封装:Tray |
发布紧急采购，3分钟左右您将得到回复。