参数资料
| 型号： | DS32512N# |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 57/130页 |
| 文件大小： | 0K |
| 描述： | IC LIU DS3/E3/STS-1 484-BGA |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 60 |
| 类型： | 线路接口装置（LIU） |
| 规程： | DS3 |
| 电源电压： | 3.135 V ~ 3.465 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 484-BGA |
| 供应商设备封装： | 484-BGA（23x23） |
| 包装： | 管件 |
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DS32506/DS32508/DS32512
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The DLOS detector supports the requirements of ANSI T1.231 for STS-1 LOS defects. At the STS-1 rate, the time
required for the DLOS detector to count 192 consecutive zeros falls in the range of 2.3
≤ T ≤ 100μs required by
ANSI T1.231 for declaring an LOS defect. Although the time required for the DLOS detector to count 192
consecutive pulse intervals with no excessive zeros is less than the 125
μs to 250μs period required by ANSI
T1.231 for clearing an LOS defect, a period of this length where LOS is inactive can easily be timed in software.
During LOS, the RCLK output pin is derived from the LIU’s reference clock. The ALOS detector has a longer time
constant than the DLOS detector. Thus, when the incoming signal is lost, the DLOS detector activates first
(asserting the RLOS pin and LOS status bit), followed by the ALOS detector. When a signal is restored, the DLOS
detector does not get a valid signal that it can qualify for no EXZ occurrences until the ALOS detector has seen the
signal rise above a signal level approximately 22dB below nominal.
8.3.6 Framer Interface Format and the B3ZS/HDB3 Decoder
The recovered data can be output in either bipolar or binary format. Reception of a B3ZS or HDB3 codeword is
flagged by the LINE.RSRL:ZSCDL latched status bit.
8.3.6.1
Bipolar Interface Format
To select the bipolar interface format, pull the RBIN pin low and clear the PORT.CR2:RBIN configuration bit. In
bipolar format, the B3ZS/HDB3 decoder is disabled and the recovered data is buffered and output on the RPOS
and RNEG outputs for subsequent decoding by a downstream framer or mapper. Received positive-polarity pulses
In DS3 and STS-1 modes an excessive zeros error (EXZ) is declared whenever there is an occurrence of 3 or
more zeros in a row in the receive data stream. In E3 mode, an EXZ error is declared whenever there is an
occurrence of 4 or more zeros. EXZs are flagged by the LINE.RSRL:EXZL and EXZCL latched status bits and
accumulated in the LINE.REXZCR register.
In all three modes (DS3, E3, and STS-1) a bipolar violation is declared if two positive pulses are received without
an intervening negative pulse or if two negative pulses are received without an intervening positive pulse. Bipolar
violations (BPVs) are flagged by the LINE.RSRL:BPVL and BPVCL latched status bits and accumulated in the
LINE.RBPVCR register.
8.3.6.2
Binary Interface Format
To select the binary interface format, pull the RBIN pin high (all ports) or set the PORT.CR2:RBIN configuration bit
(per port). In binary format, the B3ZS/HBD3 decoder is enabled, and the recovered data is decoded and output as
a binary (NRZ) value on the RDAT pin, while bipolar violations, code violations, and excessive zero errors are
detected and flagged on the RLCV pin.
In DS3 and STS-1 modes, B3ZS decoding is performed. In these modes, whenever a B3ZS codeword is found in
the receive data stream it is replaced with three zeros. In E3 mode HDB3 decoding is performed. In this mode,
whenever an HDB3 codeword is found in the receive data stream it is replaced with four zeros. The decoding
search criteria for a B3ZS/HDB3 codeword is programmable using the LINE.RCR:RDZSF control bit.
An excessive zeros error (EXZ) is declared in DS3 and STS-1 modes whenever there is an occurrence of 3 or
more zeros in a row in the receive data stream. In E3 mode, an EXZ error is declared whenever there is an
occurrence of 4 or more zeros in a row. EXZs are flagged by the LINE.RSRL:EXZL and EXZCL latched status bits
and accumulated in the LINE.REXZCR register.
A bipolar violation error (BPV error) is declared in DS3 and STS-1 modes if a BPV is detected that is not part of a
valid B3ZS codeword. In E3 mode, a bipolar violation error is declared whenever a BPV is detected that is not part
of a valid HDB3 codeword. In E3 mode if LINE.RCR:E3CVE = 1, code violations are detected rather than bipolar
violation errors. A code violation is declared whenever consecutive BPVs (not BPV errors) have the same polarity
(ITU O.161 definition). The error detection search criteria for a B3ZS/HDB3 codeword is programmable using the
LINE.RCR:REZSF control bit. Bipolar violations (or code violations if LINE.RCR:E3CVE = 1) are flagged by the
LINE.RSRL:BPVL and BPVCL latched status bits and accumulated in the LINE.RBPVCR register.
In the discussion that follows, a valid pulse that conforms to the AMI rule is denoted as B. A BPV pulse that violates
the AMI rule is denoted as V.
In DS3 and STS-1 modes, B3ZS decoding is performed, and RLCV is asserted during any RCLK cycle where the
data RDAT causes ones of the following code violations:
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相关代理商/技术参数 |
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| DS32512N# | 功能描述:网络控制器与处理器 IC 12-Port DS3/E3/STS-1 Line Interface Unit 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 |
| DS32512N+ | 功能描述:网络控制器与处理器 IC 12-Port DS3/E3/STS-1 Line Interface Unit 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 |
| DS32512NA2 | 制造商:Maxim Integrated Products 功能描述:DS32512 X12 DS3/E3 LIU REVA2 IND - Rail/Tube |
| DS32512NW | 功能描述:网络控制器与处理器 IC 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 |
| DS32512W | 功能描述:网络控制器与处理器 IC 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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