參數(shù)資料
型號(hào)： DS2151QNB
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類： Digital Transmission Controller
英文描述： DATACOM, FRAMER, PQCC44
封裝： 0.652 INCH, PLASTIC, LCC-44
文件頁(yè)數(shù)： 36/62頁(yè)
文件大?。?/td> 921K
代理商： DS2151QNB
DS2151Q
41 of 60
13.2 Transmit Waveshaping and Line Driving
The DS2151Q uses a set of laser-trimmed delay lines along with a precision Digital-to-Analog Converter
(DAC) to create the waveforms that are transmitted onto the T1 line. The waveforms created by the
DS2151Q meet the latest ANSI, AT&T, and CCITT specifications. See Figure 13-3. The user will select
which waveform is to be generated by properly programming the L0 to L2 bits in the Line Interface
Control Register (LICR).
Table 13-2. LBO Select in LICR
L2
L1
L0
LINE BUILD-OUT
APPLICATION
0
0 to 133 feet/0dB
DSX-1/CSU
0
1
133 to 266 feet
DSX-1
0
1
0
266 to 399 feet
DSX-1
0
1
399 to 533 feet
DSX-1
1
0
533 to 655 feet
DSX-1
1
0
1
-7.5dB
CSU
1
0
-15dB
CSU
1
-22.5dB
CSU
Due to the nature of the design of the transmitter in the DS2151Q, very little jitter (less than 0.005UIP-P
broadband from 10Hz to 100kHz) is added to the jitter present on TCLK. Also, the waveforms that they
create are independent of the duty cycle of TCLK. The transmitter in the DS2151Q couples to the T1
transmit twisted pair via a 1:1.15 or 1:1.36 step-up transformer as shown in Figure 13-1. For the devices
to create the proper waveforms, the transformer used must meet the specifications listed in Table 13-3.
Table 13-3. Transformer Specifications
SPECIFICATION
RECOMMENDED VALUE
Turns Ratio
1:1 (receive) and 1:1.15 or 1:1.36 (transmit)
±5%
Primary Inductance
600
H minimum
Leakage Inductance
1.0
H maximum
Intertwining Capacitance
40pF maximum
DC Resistance
1.2
maximum
相關(guān)PDF資料
PDF描述
DS2151QB DATACOM, FRAMER, PQCC44
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DS2151QNB/T&R 制造商:Maxim Integrated Products 功能描述:T1 SINGLE CHIP XCVR REV B IND - Tape and Reel
DS2151QNB/T&R 功能描述:網(wǎng)絡(luò)控制器與處理器 IC RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
DS2151QNB+ 功能描述:網(wǎng)絡(luò)控制器與處理器 IC RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
DS2151QNB+T&R 制造商:Maxim Integrated Products 功能描述:FRAMER DS1/E1/ISDN-PRI/T1 5V 44PLCC - Tape and Reel
DS2151QNB+T&R 功能描述:網(wǎng)絡(luò)控制器與處理器 IC RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
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