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参数资料
| 型号： | 951464YFLFT |
| 厂商： | INTEGRATED DEVICE TECHNOLOGY INC |
| 元件分类： | 时钟产生/分配 |
| 英文描述： | 240 MHz, OTHER CLOCK GENERATOR, PDSO56 |
| 封装： | 0.30 INCH, 0.25 INCH HEIGHT, ROHS COMPLIANT, MO-118, SSOP-56 |
| 文件页数： | 14/24页 |
| 文件大小： | 242K |
| 代理商： | 951464YFLFT |
IDTTM/ICSTM
Programmable System Clock Chip for ATI RS/RD690 K8TM - based Systems
1211B—09/17/09
ICS951464
IDTTM/ICSTM Programmable System Clock Chip for ATI RS/RD690 K8
TM - based Systems
21
Fig. 1
Shared Pin Operation -
Input/Output Pins
The I/O pins designated by (input/output) on the ICS951464
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
Via to
VDD
Clock trace to load
Series Term. Res.
Programming
Header
Via to Gnd
Device
Pad
2K
W
8.2K
W
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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相关代理商/技术参数 |
参数描述 |
|---|---|
| 951464YGLFT | 制造商:IDT 制造商全称:Integrated Device Technology 功能描述:Programmable System Clock Chip for ATI RS/RD690 K8TM - based Systems |
| 951466-2011309-AR-PT | 功能描述:集管和线壳 66P BD STCK HDR 2R STRT SMT 10U AU RoHS:否 产品种类:1.0MM Rectangular Connectors 产品类型:Headers - Pin Strip 系列:DF50 触点类型:Pin (Male) 节距:1 mm 位置/触点数量:16 排数:1 安装风格:SMD/SMT 安装角:Right 端接类型:Solder 外壳材料:Liquid Crystal Polymer (LCP) 触点材料:Brass 触点电镀:Gold 制造商:Hirose Connector |
| 951466-2011309-AR-TP | 功能描述:集管和线壳 66P BD STCK HDR 2R STRT SMT 10U AU RoHS:否 产品种类:1.0MM Rectangular Connectors 产品类型:Headers - Pin Strip 系列:DF50 触点类型:Pin (Male) 节距:1 mm 位置/触点数量:16 排数:1 安装风格:SMD/SMT 安装角:Right 端接类型:Solder 外壳材料:Liquid Crystal Polymer (LCP) 触点材料:Brass 触点电镀:Gold 制造商:Hirose Connector |
| 951466-2011409-AR-PT | 功能描述:集管和线壳 66P BD STCK HDR 2R STRT SMT 10U AU RoHS:否 产品种类:1.0MM Rectangular Connectors 产品类型:Headers - Pin Strip 系列:DF50 触点类型:Pin (Male) 节距:1 mm 位置/触点数量:16 排数:1 安装风格:SMD/SMT 安装角:Right 端接类型:Solder 外壳材料:Liquid Crystal Polymer (LCP) 触点材料:Brass 触点电镀:Gold 制造商:Hirose Connector |
| 951466-2011409-AR-TP | 功能描述:集管和线壳 66P BD STCK HDR 2R STRT SMT 10U AU RoHS:否 产品种类:1.0MM Rectangular Connectors 产品类型:Headers - Pin Strip 系列:DF50 触点类型:Pin (Male) 节距:1 mm 位置/触点数量:16 排数:1 安装风格:SMD/SMT 安装角:Right 端接类型:Solder 外壳材料:Liquid Crystal Polymer (LCP) 触点材料:Brass 触点电镀:Gold 制造商:Hirose Connector |
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