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ON Semi ICs support CML output

Posted: 14 Mar 2005 ?? ?Print Version ?Bookmark and Share

Keywords:on semiconductor? on semic? sige? pre-scaling ic? ic?

ON Semiconductor introduced SiGe-based, high bandwidth, fully differential clock distribution, clock driving, clock multiplexing, and clock pre-scaling ICs that support Current Mode Logic (CML) output. "As designers migrate from simple CMOS solutions to the performance range dominated by bipolar ICs, CML is one of the most convenient protocols for high speed interfacing and is quickly becoming the protocol of choice for emerging, high bandwidth, networking applications," said Mike Radhanauth, the company's director of marketing and business development for High Frequency Products.

The newest members of the GigaComm family of clock and data management ICs, the NB7L11M, NB7L14M, NB7L86M, NBSG16M and NB7N017M are designed for the telecommunications, networking, high-end computing and automated test equipment industries. These new devices simplify initial conditions and connection termination with on-chip 50? input and output termination, which allows for a point-to-point implementation expected of CMOS solutions but uncommon in bipolar designs. Like Reduced Swing ECL (RSECL), the 400mV signal swing of CML results in reduced power consumption and rise/fall times, said ON Semi. The irregularities that result from back reflection of signals later in the circuit, which is common to high frequency signaling, are minimized by the on-chip termination, added the company.

Capable of data-rates above 12Gbps in some cases, the new chips can be used in high performance applications in OC-192 applications. The NB7L11M is a 12Gbps, 8GHz, 2.5V or 3.3V SiGe differential clock driver that reproduces the input clock signal in the form of two identical CML output signals. Housed in a 16-pin QFN package, it is priced at $25.20 each.

The NB7L14M is a 12Gbps, 8GHz, 2.5V or 3.3V SiGe differential clock driver with a 1:4 fan-out and CML outputs; the NBSG16M is a 10Gbps, 10GHz, 2.5V or 3.3V SiGe differential receiver/driver with CML outputs; and the NB7L86M is a 12Gbps, 8GHz, 2.5V or 3.3V SiGe differential smart gate with CML outputs. The NB7L86M offers programmable flexibility to choose between AND/NAND, OR/NOR, XOR/XNOR or 2:1 multiplexing capabilities, and offers all of the primary logic functions at break-neck speeds for high performance applications. All three devices are housed in 16-pin QFN, and are priced at $30.24, $20.59 and $13.95 in 1,000-unit quantities, respectively.

The NB7N017M is a 3.3V dual 8bit modulus, divider/prescaler with CML outputs, capable of switching at speed greater than 3.5GHz. In a 52-pin QFN, it is priced at $23.26 each.

Like all members of the GigaComm family, these new products feature ON Semi's AnyLevel technology which includes 50? input termination resistors, accept all major signaling standards, including Negative ECL (LVNECL), PECL, LVCMOS/LVTTL, CML or LVDS, and are available in wafer form to offer additional design flexibility. Evaluation and demonstration boards are available for all GigaComm devices.

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