器件名称: CY2277APAC-1M
功能描述: Pentium
文件大小: 293.32KB 共18页
简 介:Y2277A
CY2277A
Pentium/II, 6x86, K6 Clock Synthesizer/Driver for Desktop/ Mobile PCs with Intel 82430TX and 2 DIMMs or 3 SO-DIMMs
Features
Mixed 2.5V and 3.3V operation Complete clock solution to meet requirements of Pentium, Pentium II, 6x86, or K6 motherboards — Four CPU clocks at 2.5V or 3.3V — Up to eight 3.3V SDRAM clocks — Seven 3.3V synchronous PCI clocks, one free running — Two 3.3V USB/IO clocks at 48 or 24 MHz, selectable by serial interface — One 2.5V IOAPIC clock at 14.318 MHz — Two 3.3V Ref. clocks at 14.318 MHz Factory-EPROM programmable CPU, PCI, and USB/IO clock frequencies for custom configuration Factory-EPROM programmable output drive and slew rate for EMI customization MODE Enable pin for CPU_STOP and PCI_STOP SMBus serial configuration interface Available in space-saving 48-pin SSOP and TSSOP packages. 82430TX or similar chipsets. There are three available options as shown in the selector guide The CY2277A outputs four CPU clocks at 2.5V or 3.3V with up to nine selectable frequencies. There are up to eight 3.3V SDRAM clocks and seven PCI clocks, running at one half the CPU clock frequency. One of the PCI clocks is free-running. Additionally, the part outputs two 3.3V USB/IO clocks at 48 MHz or 24 MHz, one 2.5V IOAPIC clock at 14.318 MHz, and two 3.3V reference clocks at 14.318 MHz. The CPU, PCI, USB, and IO clock frequencies are factory-EPROM programmable for easy customization with fast turnaround times. The CY2277A has power-down, CPU stop and P……
