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參數(shù)資料
| 型號(hào)： | 94228BFLF |
| 廠(chǎng)商： | INTEGRATED DEVICE TECHNOLOGY INC |
| 元件分類(lèi)： | 時(shí)鐘產(chǎn)生/分配 |
| 英文描述： | 233.33 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO48 |
| 封裝： | 0.300 INCH, LEAD FREE, MO-118, SSOP-48 |
| 文件頁(yè)數(shù)： | 6/19頁(yè) |
| 文件大?。?/td> | 189K |
| 代理商： | 94228BFLF |
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14
ICS94228
0447E—05/07/04
Fig. 1
Shared Pin Operation -
Input/Output Pins
The I/O pins designated by (input/output) on the ICS94228
serve as dual signal functions to the device. During initial
power-up, they act as input pins. The logic level (voltage)
that is present on these pins at this time is read and
stored into a 5-bit internal data latch. At the end of Power-
On reset, (see AC characteristics for timing values), the
device changes the mode of operations for these pins to
an output function. In this mode the pins produce the
specified buffered clocks to external loads.
To program (load) the internal configuration register for
these pins, a resistor is connected to either the VDD
(logic 1) power supply or the GND (logic 0) voltage
potential. A 10 Kilohm (10K) resistor is used to provide
both the solid CMOS programming voltage needed during
the power-up programming period and to provide an
insignificant load on the output clock during the subsequent
operating period.
Via to
VDD
Clock trace to load
Series Term. Res.
Programming
Header
Via to Gnd
Device
Pad
2K
W
8.2K
W
Figure 1 shows a means of implementing this function
when a switch or 2 pin header is used. With no jumper is
installed the pin will be pulled high. With the jumper in
place the pin will be pulled low. If programmability is not
necessary, than only a single resistor is necessary. The
programming resistors should be located close to the
series termination resistor to minimize the current loop
area. It is more important to locate the series termination
resistor close to the driver than the programming resistor.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 94228BFLFT | 制造商:Integrated Device Technology Inc 功能描述:PROGRAMMABLE PLL CLOCK GEN DUAL 48SSOP - Tape and Reel |
| 9422-9113-000 | 功能描述:RF 連接器 SMA F STR BHD SP RoHS:否 制造商:Bomar Interconnect 產(chǎn)品:Connectors 射頻系列:BNC 型式:Jack (Female) 極性: 觸點(diǎn)電鍍:Gold 阻抗: 端接類(lèi)型:Solder 主體類(lèi)型:Straight Bulkhead 電纜類(lèi)型: |
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| 94-2294 | 制造商:International Rectifier 功能描述: |
| 9422A1 | 制造商:Square D by Schneider Electric 功能描述:OPERATING MECHANISM HANDLE NEMA 制造商:Square D by Schneider Electric 功能描述:HANDLE MECHANISM; Accessory Type:Switch Disconnector; For Use With:Schneider Circuit Breakers ;RoHS Compliant: Yes |
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