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Fairchild devices provide space-efficient level translation

Posted: 05 Aug 2004 ?? ?Print Version ?Bookmark and Share

Keywords:fairchild semiconductor? fxl4t245bqx? fxl5t244bqx? logic-level translator? fxl series?

Fairchild Semiconductor unveiled its FXL4T245BQX (4-bit bidirectional) and FXL5T244BQX (5-bit unidirectional) low-voltage logic-level translators that provide space-efficient level translation between the 2.5V to 3.3V I/Os of 3-, 4-, and 5-bit memory modules.

Designed for cellphones, notebooks and other battery-powered portable devices, the CMOS-based FXL series enable interconnection between a lower voltage microprocessor and higher voltage ASIC functions. Both translators feature configurable voltage supplies (VCCA and VCCB) for the inputs and outputs, allowing translation in either direction, between typical logic levels of 1.2-, 1.5-, 1.8-, 2.5- and 3.3V. Power consumption is kept low by a maximum quiescent current specification of 20?A.

"The FXL series devices give designers the flexibility to match I/Os of existing microprocessors to higher voltage functions such as panel display and peripherals," explained Ken Murphy, marketing manager for logic products. "A significant attribute is the device's DQFN packaging that supports the miniaturization trend in portables."

Both devices are offered in the new 14-terminal DQFN leadless package that measures 2.5-by-3-by-0.8mm and requires 30 percent of the board area of TSSOP. Additionally, the DQFN package's MSL-1 (moisture sensitivity level) rating eliminates the need for dry bag storage prior to use on the production line.

Other features of the logic-level translators include low noise buffered interface with up to 24mA drive, non-preferential power-up sequencing, power-off overvoltage protection of I/Os and control pins, and a minimum of 4kV HBM (Human Body Model) ESD protection and 8kV HBM I/O-to-ground protection.

The Pb-free FXL4T245BQX and FXL5T244BQX devices can withstand end user lead-free PCB attachment processes up to 250C. They are priced at 35 cents in 10,000-piece quantities.

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