Hillsboro, Ore. TriQuint Semiconductor's 4 x 4 crosspoint switch has a data rate of 2.7 Gbits/second per port, peak-to-peak jitter of under 25 ps, output rise and fall times of less than 150 ps and channel-to-channel propagation delay skew of less than 100 ps.
The TQ8004 is designed for protection switching in fault-tolerant telecom, datacom and digital video networks, backplane routing of serial data in network and video routers, and expansion of large crosspoint switch arrays.
The switch makes it possible to select from up to four high-speed input channels or to buffer output to as many as four 50-ohm lines. For multiport line cards, it can be configured as two independent 2 x 2 switch elements, saving component cost, board area and power dissipation.
A fully differential design is said to maximize signal fidelity and minimize adjacent-channel crosstalk and jitter. High-fidelity signal transmission can simplify board layout and, in some cases, eliminate the need to re-time the signal following the switch function.
The TQ8004 operates from a 3.3-volt power supply with low-voltage PECL interface levels. Integrated 50- ohms input terminations are said to eliminate the need for external termination resistors, which further simplifies board layout. Termination voltage can be externally set for either ac- or dc-coupled designs.
Packaged in a 28-pin TSSOP, the TQ8004 is priced at $19.90 each in lots of 1,000. It's in production now.
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EETInfo No. 613