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ICS9159-05 데이터시트(PDF) 1 Page - Integrated Circuit Systems |
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ICS9159-05 데이터시트(HTML) 1 Page - Integrated Circuit Systems |
1 / 7 page Integrated Circuit Systems, Inc. General Description Features ICS9159-05 Frequency Generator for Pentium™/OPTi VIPER Systems 9159-05 Rev F 9/29/98 Block Diagram The ICS9159-05 is a low cost frequency generator designed specifically for Pentium/Pentium Pro systems. The integrated buffer minimizes skew and provides the early CPU clock required by some chipsets such as the OPTi VIPER. A 14.318 MHz XTAL oscillator provides the reference clock to generate standard Pentium frequencies. The CPU clock makes gradual frequency transitions without violating the PLL timing of internal micro-processor clock multipliers. The synchronous bus frequencies are selectable as CPU for local bus or CPU/2 for PCI bus support. Green PC systems are supported through power-down, doze, and glitch-free stop clock modes. • Four CPU clocks operate up to 66.6 MHz at 3.3V with glitch-free start and stop plus smooth transitions • 3-6ns early CPU clock supports OPTi VIPER systems • Selection of 6 frequencies, tristate, or power-down • Six BUS clocks support local PCI bus operation • Skew window between synchronous outputs • Integrated buffer outputs drive up to 30pF loads • 3.0V - 3.7V supply range • 28-pin DIP or 28-pin 300-mil SOIC package Pentium is a trademark of Intel Corporaton. PowerPC is a trademark of Motorola Corporation. Applications • Ideal for green Pentium/Pentium Pro and 486 PCI systems such as Pentium, PowerPC ™ etc. ICS reserves the right to make changes in the device data identified in this publication without further notice. ICS advises its customers to obtain the latest version of all device data to verify that any 28-Pin 300-mil SOIC Pin Configuration |
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