參數(shù)資料
型號(hào)： DS21Q50L
廠商： Maxim Integrated Products
文件頁數(shù)： 42/87頁
文件大?。?/td> 0K
描述： IC TRANSCEIVER E1 QUAD 100-LQFP
產(chǎn)品培訓(xùn)模塊： Lead (SnPb) Finish for COTS
產(chǎn)品變化通告： Product Discontinuation 20/Feb/2012
標(biāo)準(zhǔn)包裝： 90
功能： 收發(fā)器
接口： E1
電路數(shù)： 4
電源電壓： 3.14 V ~ 3.47 V
電流 - 電源： 230mA
工作溫度： 0°C ~ 70°C
安裝類型： 表面貼裝
封裝/外殼： 100-LQFP
供應(yīng)商設(shè)備封裝： 100-LQFP（14x14）
包裝： 托盤
包括： AIS 警報(bào)檢測器和發(fā)生器，回送功能，PRBS 發(fā)生器 / 檢測器，遠(yuǎn)程檢測器和發(fā)生器
DS21Q50
47 of 87
Table 9-1. Master Port Selection
SCS2
SCS1
SCS0
PORT SELECTED AS MASTER
0
None (Master Port can be derived from
another DS21Q50 in the system.)
0
1
Transceiver 1
0
1
0
Transceiver 2
0
1
Transceiver 3
1
0
Transceiver 4
1
0
1
Reserved for future use
1
0
Reserved for future use
1
Reserved for future use
Table 9-2. Synthesizer Output Select
CSS1
CSS0
SYNTHESIZER OUTPUT
FREQUENCY (MHz)
0
2.048
0
1
4.096
1
0
8.192
1
16.384
10.
TRANSMIT CLOCK SOURCE
Depending on the operating mode, 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 automatically switches 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 assigned as
the backup clock. At the same time the host can be notified of the loss-of-transmit clock through an
interrupt. The host can at any time force a switchover 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 automatically
switches to either the system reference clock or to the recovered clock off the same port, depending on
which source the host assigned as the backup clock. The host can at any time force a switchover to one of
the two backup clock sources, regardless of the state of the SYSCLK pin.
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參數(shù)描述
DS21Q50L+ 功能描述:網(wǎng)絡(luò)控制器與處理器 IC Quad 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
DS21Q50L-C01 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述:
DS21Q50LN 功能描述:網(wǎng)絡(luò)控制器與處理器 IC Quad 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
DS21Q50LN+ 功能描述:網(wǎng)絡(luò)控制器與處理器 IC Quad 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
DS21Q50L-W+ 功能描述:網(wǎng)絡(luò)控制器與處理器 IC Quad 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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