参数资料
| 型号： | DS2149QN+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 13/32页 |
| 文件大小： | 0K |
| 描述： | IC LIU T1/J1 5V 28-PLCC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 37 |
| 类型： | 线路接口装置（LIU） |
| 规程： | T1/J1 |
| 电源电压： | 4.75 V ~ 5.25 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-LCC（J 形引线） |
| 供应商设备封装： | 28-PLCC（11.51x11.51） |
| 包装： | 管件 |
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页当前第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
DS2149
20 of 32
10.1Loopback Modes
10.1.1 Local Loopback (LLB)
When local loopback is enabled (set LLB in CR2, or pull the LLB pin high), inbound data at the receiver
inputs are ignored. TCLK and TPOS/TNEG pass through the jitter attenuator if enabled and are output at
RCLK and RPOS/RNEG. The transmit path is unaffected by LLB, and will continue to transmit data
normally (or AIS if TAIS is enabled).
10.1.2 Analog Loopback (ALB)
When analog loopback (ALB) is enabled (set ALB in CR2, or float the LLB pin), the receiver input pins
are disconnected from the clock and data recovery circuit and replaced by TTIP and TRING. This tests
the entire device including the jitter attenuator, transmitter, and receiver circuits.
10.1.3 Remote Loopback (RLB)
When remote loopback (RLB) is enabled (set RLB in CR2, or pull RLB pin high), inbound data at the
receiver inputs is looped back to the transmitter path. Data passes through the jitter attenuator if enabled.
The B8ZS encoder and decoder are not included in the loopback path. The receive path continues to
operate normally.
10.1.4 Network Loopback
When ENLOOP is enabled (set ENLOOP in CR2, or float the ENLOOP pin), the in-band loop code
detector is enabled. The receiver detects the in-band loop code patterns (00001 = loop up and
001 = loop down) present in the inbound data. The detectors detect both framed and unframed loop codes.
When the loop-up pattern is detected and present for 5 seconds, the device invokes remote loopback.
ENLOOP is dropped when:
1) The in-band loop-down pattern is present for 5 seconds.
2) RLB is activated.
3) ALB is activated.
10.1.5 Dual Loopback
Dual loopback is the simultaneous enabling of RLB and LLB. If the jitter attenuator is enabled and, when
both loopback paths are enabled, the jitter attenuator is placed in the local loopback path.
相关PDF资料 |
PDF描述 |
|---|---|
| DS21348GN | IC LIU LN T1/E1/J1 3.3V 49-BGA |
| VI-241-MX-F3 | CONVERTER MOD DC/DC 12V 75W |
| MAX214EPI+ | IC TXRX RS-232 PROG 28-DIP |
| MAX214EWI+ | IC TXRX RS-232 PROG 28-SOIC |
| HI5767/2IA | CONV A/D 10BIT 20MSPS 28-SOIC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS2149QN/T&R | 制造商:Maxim Integrated Products 功能描述:IC LINE INTERFACE 5V T1/J1 PLCC 制造商:Maxim Integrated Products 功能描述:Network Controller & Processor ICs 5V T1/J1 Line Interface |
| DS2149QN/T&R+ | 制造商:Maxim Integrated Products 功能描述:FRAMER J1/T1 5V 28PLCC - Tape and Reel |
| DS2149QN/T&R | 功能描述:网络控制器与处理器 IC 5V T1/J1 Line Interface 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 |
| DS2149QN+ | 功能描述:网络控制器与处理器 IC 5V T1/J1 Line Interface 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 |
| DS2149QN+T&R | 制造商:Maxim Integrated Products 功能描述:FRAMER J1/T1 5V 28PLCC - Tape and Reel 制造商:Maxim Integrated Products 功能描述:MXMDS2149QN+T&R 5V T1/J1 LIU T&R IND PLC 制造商:Maxim Integrated Products 功能描述:IC LIU T1/J1 5V 28-PLCC 制造商:Maxim Integrated Products 功能描述:Network Controller & Processor ICs 5V T1/J1 Line Interface |
发布紧急采购，3分钟左右您将得到回复。