Bus Clock Synthesizers replace up to 8 discrete ICs.

Press Release Summary:



SY89532/3/4/5 PLL-based precision bus clock synthesizers integrate 3 clock dividers, translator, and 3 fanout buffers into single, 64-pin TQFP package. They accept quartz-crystal oscillator input or differential or single-ended reference input, and provide LVPECL or LVDS output frequency between 33 and 500 MHz. Three output banks are independently programmed for target output frequencies. Jitter and skew are less than 50pspk-pk and 50ps, respectively.



Original Press Release:


Industry's First Precision 33MHz-500MHz LVPECL/LVDS Bus Clock Synthesizers with 3 Programmable Output Frequency Banks


- Single-chip solution replaces up to 8 precision, discrete ICs

- Less than 50ps jitter and skew

- Output options include LVPECL and LVDS

SAN JOSE, Calif. -- (July 26, 2002) -Four new high-speed PLL-based, 33MHz-500MHz precision bus clock synthesizers from Micrel address the increasing clock timing demands for low-jitter and low skew in high-end server and enterprise networking systems. Micrel Semiconductor (NASDAQ: MCRL) is an industry leader in the design and manufacture of integrated circuits for the high-speed communications, power management and analog markets.

The SY89532/3/4/5 synthesizer family replaces up to eight discrete ICs by integrating a precision synthesizer, three clock dividers, a translator, and three precision fanout buffers into a single 64-pin TQFP package.

Targeted for large system clock trees in high-end, multi-processor servers and enterprise networking systems. Micrel's new family of synthesizers accept a quartz-crystal oscillator input or a differential or single-ended reference input (PECL/LVDS/HSTL/TTL/CMOS) and provides a precision LVPECL or LVDS output frequency between 33MHz and 500MHz.

Three output banks are independently programmed for their target output frequencies, offering a higher level of programming flexibility than alternative solutions. The three output banks consist of one large bank with 9 differential outputs, and two
smaller banks with two output pairs each, for a total of 13 output pairs.

Precision AC performance includes a maximum clock frequency of 500MHz, an extremely low jitter and skew of less than 5OPSpk-pk (cycle-to-cycle) and less than 50ps (pin-to-pin), respectively, and output rise/fall times of less than 300ps.

The 64-pin SY89532/3/4/5L family operates from a 3.3V +/-10% power supply, is guaranteed over the (OdegC to +85degC) commercial temperature range, and pricing starts at $17.50 (Resale) when purchased in a quantity of 1,000.

Micrel Semiconductor is a leading manufacturer of advanced, high performance communications, clock management, Ethernet switch and physical layer transceiver, mixed signal, analog and power ICs. These products include devices for fiber-optic telecommunications and networking, cellular telephones, servers, portable computer systems, computer peripherals, process control systems, consumer electronics and power supplies.

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