Valley Forge, Pa.--Aug. 28, 1997--Integrated Circuit Systems Inc. (Valley Forge, Pa.) introduced two clock generator ICs designed to provide timing signals for Fast Ethernet connectivity solutions.
The new chips reduce component count on network-ready motherboards or network interface cards, contributing to lower total system cost and higher reliability.
The MK2011 and MK2014 clock chips expand the range of Fast Ethernet connectivity products supplied by ICS. In the last year, ICS has shipped more than one million units of the ICS1890, the industry's first single-chip, CMOS-process physical layer transceiver compliant with the IEEE standard for 10Base-T/100Base-TX network connectivity.
The new clocks provide the required timing signals for the 1890 and other physical layer transceivers, as well as the Media Access Controller (MAC) chip used to complete a Fast Ethernet design. By replacing quartz crystal oscillators with CMOS-integrated circuits, system designers can reduce parts count and increase reliability. Additionally, the clock's tiny, 8-pin package is easily surface-mounted on motherboards or network interface cards.
The MK2011, designed for network interface card and hub applications, provides 20 MHz, 25 MHz, and 50 MHz clock outputs from a single 20 MHz input. For net-ready motherboard designs, the MK2014 provides three outputs, of 14.318 MHz, 20 MHz, and 25 MHz, from a 14.318 MHz input. Both chips use ICS's phase-lock loop (PLL) clock synthesis circuitry, with the lowest measured jitter in the industry and a zero ppm (parts per million) synthesis error in the output frequencies.
Both of the clocks are packaged in an 8-pin SOIC, occupy a surface area less than 5 mm by 6.2 mm, and operate at both 3.3V and 5V. Pricing ranges from $2.50 to $0.95, depending on volume.
Integrated Circuit Systems
Valley Forge, PA
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