CY2276A-13

The CY2276A-12 and CY2276A-13 are Clock Synthesizer/ Drivers for Pentium or Pentium II-based PCs designed with an Intel 82440LX or similar core-logic chipset.

The CY2276A-12 and CY2276A-13 output five CPU clocks at  2.5V. There are seven PCI clocks, at one half the CPU clock frequency, one of which is free-running. Additionally, the parts drive out sixteen 3.3V SDRAM clocks at the CPU clock frequency, three 2.5V IOAPIC clocks at 14.318 MHz, and one 3.3V reference clock at 14.318 MHz.

The CY2276A-12 and CY2276A-13 can be used with a peripheral clock generator (CY2030) which can generate USB, I/O, reference, and Audio clocks, thus providing a complete solution for motherboard manufacturers.

The CY2276A-12 and CY2276A-13 outputs are designed for low EMI emission. Controlled rise and fall times, unique output driver circuits and factory-EPROM programmable output drive and slew-rate enable optimal configurations for EMI control.