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| 型號： | DS2154L |
| 英文描述： | Enhanced E1 Single Chip Transceiver |
| 中文描述： | 增強素E1單芯片收發(fā)器 |
| 文件頁數(shù)： | 64/87頁 |
| 文件大小： | 1106K |
| 代理商： | DS2154L |
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DS2154
64 of 87
Normally, the clock that is output at the RCLKO pin is the recovered clock from the E1 AMI/HDB3
waveform presented at the RTIP and RRING inputs. When no AMI signal is present at RTIP and RRING,
a Receive Carrier Loss (RCL) condition will occur and the RCLKO will be sourced from the clock
applied at the MCLK pin. If the jitter attenuator is either placed in the transmit path or is disabled, the
RCLKO output can exhibit slightly shorter high cycles of the clock. This is due to the highly oversampled
digital clock recovery circuitry. If the jitter attenuator is placed in the receive path (as is the case in most
applications), the jitter attenuator restores the RCLK to being close to 50% duty cycle. Please see the
Receive AC Timing Characteristics in Section 14 for more details.
12.2 TRANSMIT WAVESHAPING AND LINE DRIVING
The DS2154 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 E1 line. The waveforms created by the
DS2154 meet the ITU G.703 specifications. See Figure 12-3. The user will select which waveform is to
be generated by properly programming the L2/L1/L0 bits in the Line Interface Control Register (LICR).
The DS2154 can be set up in a number of various configurations depending on the application. See Table
12-2 and Figure 12-1.
LINE BUILD OUT SELECT IN LICR
Table 12-2
LLL
210
APPLICATION
000
75 ohms normal (See Note 1)
001
120 ohms normal
010
75 ohms w/ protection resistors
011
120 ohms w/ protection resistors
100
75 ohms w/ high return loss
110
75 ohms w/ high return loss
100
120 ohms w/ high return loss
TRANSFORMER
1:1.15 step-up
1:1.15 step-up
1:1.15 step-up
1:1.15 step-up
1:1.15 step-up
1:1.36 step-up
1:1.36 step-up
RETURN
LOSS
NM
NM
NM
NM
21dB
21dB
21dB
RT (SEE
FIGURE 12-1)
0 ohms
0 ohms
8.2 ohms
8.2 ohms
27 ohms
18 ohms
27 ohms
NOTE:
1.
This LBO is not recommended for use in the A2 revision of the DS2154.
Due to the nature of the design of the transmitter in the DS2154, very little jitter (less then 0.005 UIpp
broadband from 10 Hz to 100 kHz) 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 DS2154 couples to the E1
transmit shielded twisted pair or COAX via a 1:1.15 or 1:1.36 step up transformer as shown in Figure 12-
1. In order for the devices to create the proper waveforms, this transformer used must meet the
specifications listed in Table 12-3 The line driver in the DS2154 contains a current limiter that will
prevent more than 50 mA (rms) from being sourced in a 1 ohm load.
TRANSFORMER SPECIFICATIONS
Table 12-3
SPECIFICATION
Turns Ratio
Primary Inductance
Leakage Inductance
Intertwining Capacitance
DC Resistance
RECOMMENDED VALUE
1:1 (receive) and 1:1.15 or 1:1.36 (transmit)
±
5%
600 uH minimum
1.0 uH maximum
40 pF maximum
1.2 ohms maximum
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DS2154LN | Enhanced E1 Single Chip Transceiver |
| DS2154 | WSD 151 SOLDERING STATION 230V UKWSD 151 SOLDERING STATION 230V UK; Frequency, supply max:60Hz; Frequency, supply min:50Hz; Height:101mm; Length:166mm; Power, input:150W; Temperature range:50(degree C) - 550(degree C); Voltage, |
| DS2155 | T1/E1/J1 Single-Chip Transceiver TDM/UTOPIA II Interface |
| DS2156 | T1/E1/J1 Single-Chip Transceiver TDM/UTOPIA II Interface |
| DS2156L | T1/E1/J1 Single-Chip Transceiver TDM/UTOPIA II Interface |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS2154L+ | 功能描述:網(wǎng)絡(luò)控制器與處理器 IC Enhanced E1 Transceiver 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 |
| DS2154LA2 | 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 |
| DS2154LA2+ | 功能描述:網(wǎng)絡(luò)控制器與處理器 IC Enhanced E1 Transceiver 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 |
| DS2154L-C01 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| DS2154LD1 | 功能描述:網(wǎng)絡(luò)控制器與處理器 IC Enhanced E1 Transceiver 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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