MK1442-03S中文資料華潤微電子數(shù)據(jù)手冊PDF規(guī)格書

Description

The MK1442/3 are the ideal way to generate clocks for desktop computer motherboards and LAN workstations. Using analog Phase-Locked Loop (PLL) techniques, the devices accept a 14.318 MHz crystal input to produce multiple output clocks up to 100 MHz. They provide 2XCPU, CPU, floppy controller, keyboard, system, SCSI and Ethernet clocks. The MK1442/3 are perfect for new Pentium? Processor, PCI bus and 486 systems. The devices can operate at 5V or 3.3V up to and including 80MHz on the CPU clock.

Features

? Provides exact frequency Ethernet and SCSI clocks

? 5V or 3.3V (up to 80MHz) operation

? Output clock frequencies up to 100 MHz

? Pentium? Processor compatible timing

? 486 compatible smooth frequency transitions

? Seven or eight output clocks

? Compatible with X86 and 680X0 CPUs

? Skew controlled 2X and 1X CPU to within 250ps

? Packaged in 16 pin skinny SOIC or PDIP

? Duty cycle of 47.5/52.5 up to 66.66 MHz

? Duty cycle of 45/55 up to 100 MHz

? Total of 15 different selectable CPU frequencies

? Tri-state outputs for board level testing

? 25mA drive capability at TTL levels

? Keyboard frequencies of 12MHz (-01), 8MHz (-02), or 16MHz (-03)

? Advanced, low power CMOS process

? MK1442 - output enable

? MK1443 - two 14.318 MHz outputs