San Jose, Calif.-- Dec. 22, 1997--Cypress Semiconductor introduced the CY227xmotherboard clock generators, a family of solutions for high-performancePentium II, Cyrix 6x86, and AMD K6 motherboards.
The family consists of seven base devices and over 15 options for both desktop and mobile designs. They are designed to support the latest advances in PC technology such as AGP, USB, and SDRAM, and provide low-cost, single-chip solutions for key motherboard frequencies.
The CY227x devices contain up to three integrated phase-locked loops (PLLs) and generate up to 32 outputs for system, bus, and peripheral clocks. The devices support up to seven selectable CPU clocks, up to 10 PCI clocks, and up to 16 SDRAM clocks.
Additional features include support for one to three USB clocks, AGP, one to three 2.5-V IOAPIC (I/O Advanced Programmable Interrupt Controller) clocks, I/O clocks, and up to three reference clocks. The devices were designed to ensure compatibility with Intel's 440FX, 430TX, and 440LX chipsets. In addition, there are also options to support ALI Aladdin IV and V+, SiS, and Via chipsets.
The CY227x outputs are designed for maximum flexibility with tight control of EMI and clock parameters. The devices contain EPROM programmable features for customization and are optimized for fast turn-around. Controlled rise and fall times, unique output driver circuits, and EPROM programmable output drive and slew rates enable optimal configurations for EMI control.
In addition, the devices support EPROM programmable CPU clocks and provide stringent jitter and skew control to avoid system-timing problems.
The CY227x family contains options for mobile, desktop, and server designs. The CY2272, CY2277A, and CY2278 contain selectable power management functions for mobile designs. Features include free-running CPU and PCI clocks, CPU stop, PCI stop, and powerdown options. The CY2273A, CY2275A, and CY2276A are ideal for desktop designs. The CY2273A has the unique ability to support 60- and 66-MHz AGP clocks with 75-MHz and 83.3-MHz processors, ensuring superior AGP performance at these frequencies.
The CY2272, CY2273A, CY2275A, and CY2277A are available in production volumes now, priced at $1.95 in 100,000-unit volumes. The CY2276A and CY2278A are also available in production quantities, priced at $2.15 and $2.54 respectively. The devices are available in space-saving 48- and 56-pin SSOP packages and in the ultraslim 48-pin TSSOP package.
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