參數(shù)資料
型號(hào)： DS2152LN
英文描述： Enhanced T1 Single-Chip Transceiver
中文描述： 增強(qiáng)型T1單芯片收發(fā)器
文件頁(yè)數(shù)： 71/94頁(yè)
文件大?。?/td> 1003K
代理商： DS2152LN
DS2152
71 of 93
14.1 RECEIVE CLOCK AND DATA RECOVERY
The DS2152 contains a digital clock recovery system. See the DS2152 Block Diagram in Section 1 and
Figure 14-1 for more details. The DS2152 couples to the receive T1 twisted pair via a 1:1 transformer.
See Table 14-3 for transformer details. The 1.544 MHz clock attached at the MCLK pin is internally
multiplied by 16 via an internal PLL and fed to the clock recovery system. The clock recovery system
uses the clock from the PLL circuit to form a 16 times oversampler which is used to recover the clock and
data. This oversampling technique offers outstanding jitter tolerance (see Figure 14-2).
Normally, the clock that is output at the RCLKO pin is the recovered clock from the T1 AMI/B8ZS
waveform presented at the RTIP and RRING inputs. When no AMI signal is present at RTIP and RRING,
a Receive Carrier Loss (LRCL) 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 over-
sampled 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 16 for more details.
14.2 TRANSMIT WAVESHAPING AND LINE DRIVING
The DS2152 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
DS2152 meet the latest ANSI, AT&T, and ITU specifications. See Figure 14-3. 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 DS2152 can set up in a number of various configurations depending on the
application. See Table 14-2 and Figure 14-1.
LINE BUILD OUT SELECT IN LICR
Table 14-2
L2
L1
L0
0
0
0
0
0
1
0
1
0
0
1
1
1
0
0
1
0
1
1
1
0
1
1
1
LINE BUILD OUT
0 to 133 feet / 0dB
133 to 266 feet
266 to 399 feet
399 to 533 feet
533 to 655 feet
-7.5 dB
-15 dB
-22.5 dB
APPLICATION
DSX-1 / CSU
DSX-1
DSX-1
DSX-1
DSX-1
CSU
CSU
CSU
Due to the nature of the design of the transmitter in the DS2152, very little jitter (less then 0.005 UIpp
broadband from 10 Hz to 100 kHz) is added to the jitter present on TCLKI. Also, the waveforms that they
create are independent of the duty cycle of TCLK. The transmitter in the DS2152 couples to the T1
transmit twisted pair via a 1:1.15 or 1:1.36 step up transformer as shown in Figure 14-1. In order for the
devices to create the proper waveforms, this transformer used must meet the specifications listed in Table
14-3.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DS2152LN+ 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
DS2153DK 功能描述:KIT DESIGN TXRX E1 DS2153 RoHS:否 類別:編程器，開(kāi)發(fā)系統(tǒng) >> 過(guò)時(shí)/停產(chǎn)零件編號(hào) 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 傳感器類型:CMOS 成像，彩色（RGB） 傳感范圍:WVGA 接口:I²C 靈敏度:60 fps 電源電壓:5.7 V ~ 6.3 V 嵌入式:否 已供物品:成像器板 已用 IC / 零件:KAC-00401 相關(guān)產(chǎn)品:4H2099-ND - SENSOR IMAGE WVGA COLOR 48-PQFP4H2094-ND - SENSOR IMAGE WVGA MONO 48-PQFP
DS2153Q 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:E1 Single-Chip Transceiver
DS2153Q-A5 功能描述:IC TXRX E1 1-CHIP 5V 44-PLCC RoHS:否 類別:集成電路 (IC) >> 接口 - 電信 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS 產(chǎn)品變化通告:Product Discontinuation 06/Feb/2012 標(biāo)準(zhǔn)包裝:750 系列:*
DS2153Q-A5/T&R 制造商:Maxim Integrated Products 功能描述:IC TXRX E1 1-CHIP 5V 44-PLCC
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