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参数资料
型号： DS26504LN+
厂商： Maxim Integrated Products
文件页数： 111/129页
文件大小： 0K
描述： IC T1/E1/J1 64KCC ELEMENT 64LQFP
产品培训模块： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装： 160
功能： BITS 元件
接口： 64KCC，E1，T1
电路数： 1
电源电压： 3.14 V ~ 3.47 V
电流 - 电源： 150mA
工作温度： -40°C ~ 85°C
安装类型： 表面贴装
封装/外壳： 64-LQFP
供应商设备封装： 64-LQFP（10x10）
包装： 托盘
包括： *
DS26504 T1/E1/J1/64KCC BITS Element
82 of 129
13.2.2 Receive G.703 Section 13 Synchronization Signal
The DS26504 can receive a 2.048MHz square-wave synchronization clock as specified in Section 13 of
ITU G.703. To use the DS26504 in this mode, set the mode configuration bits in the Mode Configuration
Register (MCREG).
13.2.3 Monitor Mode
Monitor applications in both E1 and T1 require various flat-gain settings for the receive-side circuitry.
The DS26504 can be programmed to support these applications via the monitor mode control bits MM1
and MM0 in the LIC3 register.
Figure 13-2. Typical Monitor Application
PRIMARY
T1/E1 TERMINATING
DEVICE
MONITOR
PORT JACK
T1/E1 LINE
X
F
M
R
DS26504
Rt
Rm
SECONDARY T1/E1
TERMINATING
DEVICE
13.3 LIU Transmitter
The DS26504 uses a phase-lock loop along with a precision digital-to-analog converter (DAC) to create
the waveforms that are transmitted onto the E1 or T1 line. The waveforms created by the DS26504 meet
the latest ETSI, ITU, ANSI, and AT&T specifications. The waveform that is to be generated is set by the
transmit mode bits (TMODE[3:0]) in the MCREG register, as well as the L2/L1/L0 bits in register LIC1
if applicable.
ITU specification G.703 requires an accuracy of ±50ppm for both T1 and E1. TR62411 and ANSI specs
require an accuracy of ±32ppm for T1 interfaces. The transmit clock can be sourced from the recovered
clock (RCLK), the pre-scaled MCLK, the TCLK pin, or the TX PLL. See the TX PLL clock mux
diagram in Figure 3-3. Due to the nature of the design of the transmitter in the DS26504, very little jitter
(less than 0.005UIP-P broadband from 10Hz to 100kHz) is added to the jitter present on the selected
transmit clock source. Also, the waveforms created are independent of the duty cycle of TCLK. The
transmitter in the DS26504 couples to the transmit twisted pair (or coaxial cable in some applications) via
a 1:2 step-up transformer. For the device to create the proper waveforms, the transformer used must meet
the specifications listed in Table 13-3. The DS26504 has the option of using software-selectable transmit
termination.
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参数描述
DS26504LN+ 功能描述:计时器和支持产品 E1/T1/J1/64Kcc Bits Element RoHS:否 制造商:Micrel 类型:Standard 封装 / 箱体:SOT-23 内部定时器数量:1 电源电压-最大:18 V 电源电压-最小:2.7 V 最大功率耗散: 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装:Reel
DS26504LN+T&R 制造商:Maxim Integrated Products 功能描述:T1/E1/J1 ENH BITS IC LQFP LF T&R - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC T1/E1/J1 64KCC ELEMENT 64LQFP
DS26504LN+T&R 功能描述:网络控制器与处理器 IC E1/T1/J1/64Kcc Bits Element 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
DS26504LNB2 功能描述:网络控制器与处理器 IC E1/T1/J1/64Kcc Bits Element 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
DS26504LNB2+ 功能描述:网络控制器与处理器 IC E1/T1/J1/64Kcc Bits Element 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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