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參數(shù)資料
| 型號(hào)： | DS21Q50N |
| 英文描述： | Telecommunication IC |
| 中文描述： | 通信集成電路 |
| 文件頁(yè)數(shù)： | 55/99頁(yè) |
| 文件大?。?/td> | 325K |
| 代理商： | DS21Q50N |
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DS21Q50
Page 55 of 99
13. TRANSMIT CLOCK SOURCE
Depending on the operating mode of the DS21Q50, the Transmit Clock can be derived from different sources.
In a basic configuration, where the IBO function is disabled, the transmit clock is normally sourced from the
TCLK pin. In this mode a 2.048MHz clock with +/- 50ppm accuracy is applied to the TCLK pin. If the signal
at TCLK is lost, the DS21Q50 will automatically switch to either the system reference clock present on the
REFCLK pin, or to the recovered clock off the same port depending on which source the host at assigned as the
backup clock. At the same time the host can be notified of the loss of transmit clock via an interrupt. The host
may at any time force a switch over to one of the two backup clock sources regardless of the state of the TCLK
pin.
When the IBO function is enabled, the transmit clock must be synchronous to the system clock since slips are not
allowed in the transmit direction. In this mode, the TCLK pin is ignored and a transmit clock is automatically
provided by the IBO circuit by dividing the clock present on the SYSCLK pin by 2, 4, or 8. In this
configuration, if the signal present on the SYSCLK pin is lost, the DS21Q50 will automatically switch to either
the system reference clock or to the recovered clock off the same port depending on which source the host at
assigned as the backup clock. The host may at any time force a switch over to one of the two backup clock
sources regardless of the state of the SYSCLK pin.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS21Q55 | 功能描述:IC TXRX QUAD T1/E1/J1 SCT 256BGA RoHS:否 類(lèi)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:* |
| DS21Q552 | 功能描述:網(wǎng)絡(luò)控制器與處理器 IC 5V Quad T1 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 |
| DS21Q552+ | 功能描述:網(wǎng)絡(luò)控制器與處理器 IC 5V Quad T1 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 |
| DS21Q552B | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| DS21Q552BN | 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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