參數(shù)資料
型號(hào): ICS951403YGLF-T
元件分類(lèi): 時(shí)鐘產(chǎn)生/分配
英文描述: 166.67 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO48
封裝: 0.240 INCH, 0.020 INCH PITCH, LEAD FREE, MO-153, TSSOP-48
文件頁(yè)數(shù): 5/18頁(yè)
文件大小: 639K
代理商: ICS951403YGLF-T
13
ICS951403
0486B—02/23/04
Fig. 1
Shared Pin Operation -
Input/Output Pins
The I/O pins designated by (input/output) 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.
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.
相關(guān)PDF資料
PDF描述
ICS951403YF-T 166.67 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO48
ICS951403YFLF-T 166.67 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO48
ICS951411YGLFT 400 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO56
ICS951412YGLFT 220 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO56
ICS951412YGT 220 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO56
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