参数资料
型号: DS21Q58L+
厂商: Maxim Integrated Products
文件页数: 44/74页
文件大小: 0K
描述: IC TXRX E1 QUAD 3.3V 100LQFP
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 90
功能: 收发器
接口: E1
电路数: 4
电源电压: 3.14 V ~ 3.47 V
电流 - 电源: 230mA
工作温度: 0°C ~ 70°C
安装类型: 表面贴装
封装/外壳: 100-LQFP
供应商设备封装: 100-LQFP(14x14)
包装: 托盘
包括: AIS 警报检测器和发生器,回送功能,PRBS 发生器 / 检测器,远程检测器和发生器
产品目录页面: 1429 (CN2011-ZH PDF)
DS21Q58 E1 Quad Transceiver
49 of 74
21.3 Transmit Waveshaping and Line Driving
The DS21Q58 uses a set of laser-trimmed delay lines and a precision digital-to-analog converter (DAC) to create
the waveforms that are transmitted onto the E1 line. The waveforms meet the ITU G.703 specifications
(Figure 21-4). The user selects which waveform is to be generated by properly programming the L2/L1/L0 bits in
the line interface control register (LICR). The DS21Q58 can be set up in a number of various configurations
depending on the application (Table 21-2).
Table 21-2. Line Build-Out Select in LICR
L2
L1
L0
APPLICATION
TRANSFORMER
RETURN LOSS
*
Rt (
W)
**
0
75
W normal
1:2 step-up
N.M.
0
1
120
W normal
1:2 step-up
N.M.
0
1
0
75
W with protection resistors
1:2 step-up
N.M.
2.5
0
1
120
W with protection resistors
1:2 step-up
N.M.
2.5
1
0
75
W with high return loss
1:2 step-up
21dB
6.2
1
0
1
120
W with high return loss
1:2 step-up
21dB
11.6
*N.M. = Not meaningful (return loss value too low for significance)
**Refer to Application Note 336: Transparent Operation on T1, E1 Framers and Transceivers for details on E1 line interface design.
Because of the nature of the transmitter’s design, very little jitter (less than 0.005UIP-P broadband from 10Hz to
100kHz) is added to the jitter present on TCLK (or source used for transmit clock). Also, the waveform created is
independent of the duty cycle of TCLK. The device’s transmitter couples to the E1-transmit shielded twisted pair or
coax through a 1:2 step-up transformer, as shown in Figure 21-2. For the devices to create the proper waveforms,
the transformer used must meet the specifications listed in Table 21-3. The line driver in the device contains a
current limiter that prevents more than 50mA (RMS) from being sourced in a 1
W load.
Table 21-3. Transformer Specifications
SPECIFICATION
RECOMMENDED VALUE
Turns Ratio
1:1 (receive) and 1:2 (transmit) ±3%
Primary Inductance
600
mH minimum
Leakage Inductance
1.0
mH maximum
Intertwining Capacitance
40pF maximum
DC Resistance
1.2
W maximum
Figure 21-2. External Analog Connections (Basic Configuration)
RTIP
RRING
TTIP
TRING
E1 TRANSMIT
LINE
DS21Q58
0.47
mF
(NONPOLARIZED)
DVDD
DVSS
0.1
mF
RVDD
RVSS
0.1
mF
TVDD
TVSS
0.1
mF
+3.3V
Rr
0.1
mF
0.01
mF
2.048MHz
MCLK
1 : 1
2 : 1
Rr
1/4
E1 RECEIVE
LINE
相关PDF资料
PDF描述
DS21354LB+ IC TXRX E1 3.3V 100-LQFP
DS21554LN+ IC TXRX E1 1-CHIP 5V 100-LQFP
DS21352LN+ IC TXRX T1 1-CHIP 3.3V 100-LQFP
DS2156L+ IC TXRX T1/E1/J1 1-CHIP 100-LQFP
DS2155LC2+ IC TXRX T1/E1/J1 SGL 100-LQFP
相关代理商/技术参数
参数描述
DS21Q58L+ 功能描述:网络控制器与处理器 IC Quad E1 Transceiver 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
DS21Q58LN 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
DS21Q58LN+ 功能描述:网络控制器与处理器 IC Quad E1 Transceiver 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
DS21Q59 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:RELIABILITY REPORT FOR DS21Q59, REV A2
DS21Q59DK 功能描述:网络开发工具 DS21Q59 Dev Kit RoHS:否 制造商:Rabbit Semiconductor 产品:Development Kits 类型:Ethernet to Wi-Fi Bridges 工具用于评估:RCM6600W 数据速率:20 Mbps, 40 Mbps 接口类型:802.11 b/g, Ethernet 工作电源电压:3.3 V