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參數資料
| 型號： | DS26303LN-120+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數： | 59/101頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC LIU E1/T1/J1 3.3V 144-ELQFP |
| 產品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 13 |
| 類型： | 線路接口裝置（LIU） |
| 驅動器/接收器數： | 8/8 |
| 規(guī)程： | T1/E1/J1 |
| 電源電壓： | 3.135 V ~ 3.465 V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 144-LQFP 裸露焊盤 |
| 供應商設備封裝： | 144-LQFP 裸露焊盤 |
| 包裝： | 托盤 |
| 產品目錄頁面： | 1430 (CN2011-ZH PDF) |
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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.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| DS26303LN-120+ | 功能描述:電信線路管理 IC 3.3V E1/T1/J1 Short Haul Octal LIU RoHS:否 制造商:STMicroelectronics 產品:PHY 接口類型:UART 電源電壓-最大:18 V 電源電壓-最小:8 V 電源電流:30 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風格:SMD/SMT 封裝 / 箱體:VFQFPN-48 封裝:Tray |
| DS26303LN-120+A3 | 功能描述:電信線路管理 IC 3.3V E1/T1/J1 Short Haul Octal LIU RoHS:否 制造商:STMicroelectronics 產品:PHY 接口類型:UART 電源電壓-最大:18 V 電源電壓-最小:8 V 電源電流:30 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風格:SMD/SMT 封裝 / 箱體:VFQFPN-48 封裝:Tray |
| DS26303LN-120A3 | 功能描述:電信線路管理 IC 3.3V E1/T1/J1 Short Haul Octal LIU RoHS:否 制造商:STMicroelectronics 產品:PHY 接口類型:UART 電源電壓-最大:18 V 電源電壓-最小:8 V 電源電流:30 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風格:SMD/SMT 封裝 / 箱體:VFQFPN-48 封裝:Tray |
| DS26303LN-75 | 功能描述:電信線路管理 IC 3.3V E1/T1/J1 Short Haul Octal LIU RoHS:否 制造商:STMicroelectronics 產品:PHY 接口類型:UART 電源電壓-最大:18 V 電源電壓-最小:8 V 電源電流:30 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風格:SMD/SMT 封裝 / 箱體:VFQFPN-48 封裝:Tray |
| DS26303LN-75+ | 功能描述:電信線路管理 IC 3.3V E1/T1/J1 Short Haul Octal LIU RoHS:否 制造商:STMicroelectronics 產品:PHY 接口類型:UART 電源電壓-最大:18 V 電源電壓-最小:8 V 電源電流:30 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風格:SMD/SMT 封裝 / 箱體:VFQFPN-48 封裝:Tray |
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