参数资料
| 型号： | DS2149QN+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 16/32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页第13页第14页第15页当前第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
23 of 32
10.4Alarm Monitoring
10.4.1 Receive-Carrier Loss (RCL)
The receiver counts inbound 0s and declares RCL when the counter reaches 192. This applies to hardware
mode and software mode if the RCL2048 bit is cleared in CR4. In software mode, setting the RCL2048
bit changes the RCL counter to declare receive-carrier loss after 2048 consecutive 0s. Once set, the RCL
bit will remain set until the receiver detects a 12.5% density of 1s in a sliding window of 112 bits,
provided that there are no more than 98 consecutive 0s in that 112-bit window. When RCL is active,
RCLK is replaced by MCLK. RCL is indicated by an output high on the RCL pin and with a 1 in SR.0.
10.4.2 Alarm-Indication-Signal Detection (AIS)
AIS detection is only available in software mode. The receiver declares receipt of AIS when fewer than
six 0s are detected in 4632 bits (3ms). AIS is cleared when three or more 0s are received in 4632 bits. The
AIS bit in the status register (SR.2) indicates the presence of AIS. When the AIS status bit changes, the
AIS bit in the transition status register (TSR.2) is set. A change in the AIS status will generate an
interrupt if the AIS interrupt mask bit (IMR.2) bit is cleared.
10.4.3 Driver-Fail Monitor-Open (DFMO)
The DFMO bit is set in the status register when the transmitter outputs detect an open circuit. DFMO can
generate an interrupt if the DFMO interrupt mask bit (IMR.5) is cleared. This is not supported in
hardware mode.
10.4.4 Jitter Attenuator Limit Trip (JALT)
If the incoming jitter exceeds either 120 UIp-p (buffer depth is 128 bits) or 28 UIp-p (buffer depth is 32
bits), then the DS2149 will divide the internal nominal 24.704MHz (T1) clock by either 15 or 17 instead
of the normal 16 to keep the buffer from overflowing. When the device divides by either 15 or 17, it also
sets the jitter attenuator limit trip (JALT) bit in information register 1 (IR1).
10.5Other Diagnostic Reports
10.5.1 Receive Line-Attenuation Indication
The device reports the approximate inbound signal strength in the status register (IR). The four most
significant bits indicate the signal strength in approximately 2.5dB increments.
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。