- 您现在的位置：买卖IC网 > PDF目录24623 > 9248BF-81LFT (INTEGRATED DEVICE TECHNOLOGY INC) 133.3 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO48 PDF资料下载
参数资料
| 型号： | 9248BF-81LFT |
| 厂商： | INTEGRATED DEVICE TECHNOLOGY INC |
| 元件分类： | 时钟产生/分配 |
| 英文描述： | 133.3 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO48 |
| 封装： | 0.300 INCH, GREEN, SSOP-48 |
| 文件页数： | 3/20页 |
| 文件大小： | 568K |
| 代理商： | 9248BF-81LFT |
11
ICS9248- 81I
Advance Information
0851—08/06/03
The I/O pins designated by (input/output) on the ICS9248-
81I 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 4-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.
Shared Pin Operation -
Input/Output Pins
Fig. 1
Figs. 1 and 2 show the recommended means of
implementing this function. In Fig. 1 either one of the
resistors is loaded onto the board (selective stuffing) to
configure the device’s internal logic. Figs. 2a and b provide
a single resistor loading option where either solder spot
tabs or a physical jumper header may be used.
These figures illustrate the optimal PCB physical layout
options. These configuration resistors are of such a large
ohmic value that they do not effect the low impedance
clock signals.The layouts have been optimized to provide
as little impedance transition to the clock signal as
possible, as it passes through the programming resistor
pad(s).
相关PDF资料 |
PDF描述 |
|---|---|
| 9248BF-81LF | 133.3 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO48 |
| 9248DF-39LF | 150 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO48 |
| 9248DF-39 | 150 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO48 |
| 9248DF-39LFT | 150 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO48 |
| 051-911-9072 | RF Coaxial Connectors |
相关代理商/技术参数 |
参数描述 |
|---|---|
| 9248DF-39LF | 功能描述:时钟发生器及支持产品 RoHS:否 制造商:Silicon Labs 类型:Clock Generators 最大输入频率:14.318 MHz 最大输出频率:166 MHz 输出端数量:16 占空比 - 最大:55 % 工作电源电压:3.3 V 工作电源电流:1 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:QFN-56 |
| 9248DF-39LFT | 功能描述:时钟发生器及支持产品 RoHS:否 制造商:Silicon Labs 类型:Clock Generators 最大输入频率:14.318 MHz 最大输出频率:166 MHz 输出端数量:16 占空比 - 最大:55 % 工作电源电压:3.3 V 工作电源电流:1 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:QFN-56 |
| 9248EGM | 制造商:Excelta Corporation 功能描述:5" TAPER RLVD CUTTER WITH MELDED TEAL GRIPS |
| 9248YF-50-T | 制造商:ICS 制造商全称:ICS 功能描述:Frequency Timing Generator for Pentium II Systems |
| 9249 | 制造商:Apex Tool Group 功能描述:PUSH ROD FOR 9290 SERIES PNEUMATIC CUTTER |
发布紧急采购，3分钟左右您将得到回复。