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Semtech chip with low propagation delay dispersions

Posted: 01 Apr 2005 ?? ?Print Version ?Bookmark and Share

Keywords:semtech international? e7804? bicmos? electronics ic?

A low power, four channel BiCMOS pin electronics IC designed to bring high-end features to low-cost logic, memory or mixed signal automated test equipment (ATE) systems was recently unveiled by Semtech International AG.

The new E7804 tri-statable drivers operate up to 133MHz at 3V with low propagation delay dispersions (250mW/channel typical and 500mW maximum over all temperature and driving frequencies) due in part to on-chip self-calibrating output impedance circuitry to match the driven loads. This new product can generate high quality signals over a range of -0.2V to 5.2V, and includes a 4,000V ESD protection.

Each channel on the device has a window comparator that is well matched in performance to the drivers for dispersion stability and high speed tracking. Each channel also has its own programmable continuity test circuit (CTC) that allows for rapid, concurrent testing of continuity, shorts and opens on the device under test (DUT). With CTC functionality on all channels, all active pins may be tested at the same time, increasing overall throughput for ATE applications, added Semtech.

"The highly integrated, BiCMOS-based design of the E7804 gives our customers the features and performance they need to compete in an evolving yet cost-driven market," commented Tim Wilhelm, marketing director for test & measurement products. "Not only is the feature set robust, but it is carefully chosen to yield the best cost per channel with important throughput enhancements for ATE systems."

The E7804 features timing accuracy that can eliminate the need for systems to employ additional timing measurement and deskew circuitry. Timing accuracies are specified over the entire range of process, voltage and temperature and all specifications are fully defined and guaranteed.

For rapid programming via serial data bus, the new product supports a PinCast methodology, which increases the throughput of testers by cutting down the time needed for individually programming all the hundreds to thousands of pin channels in a system. Any channel on the device can be independently assigned to any one, none or all of the eight possible sets. Subsequently, a single Set instruction can broadcast to all devices, and all pin channels assigned to that Set will program accordingly in unison.

The E7804 is available in production quantities and is priced at $37.22 per 1,000-piece lot. It is housed in a 128-pin MQFP package, with the ordering code of E7804AHF. An evaluation board is also available with the ordering code of E7804EVM.

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