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Chip maker launches single-chip level translators for mobile phones

Geneva—Housed in tiny 3-mm x 3mm µTFBGA25 packaging, STMicroelectronics' 6-bit level translators are designed to interface the 1.8- or 2.5-V signals of mobile phones and other products with the nominal 3.3V levels used by plug-in memory cards.

The ST6G3238E includes ESD protection circuits that provide up to 8-kV protection on the memory port, enabling direct connection to the external card slot.

An integrated 40-Ohm series resistor on each card-side input aids EMI noise reduction, while on-chip pull-up resistors are provided on the card detect and write protect detection inputs. ESD protection on the microprocessor port is 2-kV.

High memory density, physically small memory cards, such as the SD, Mini-SD and MMC formats, are increasingly common features of mobile phones, set-top boxes and PDAs. The ST6G3238E is a compact, high-speed device for building the interface to an external card, with contact ESD protection and card detection. Propagation delay is 4.4-ns (max) for 2.3-V/3.0-V translation, and quiescent current is 20-µA (max) on each side of the interface.

Controlled by a command line and with clock synchronization, the level translators are designed to support two-way asynchronous communication of up to 3+1 bits of bi-directional data between the different voltage systems. Input/output protection is provided when the device is powered down.

The ST6G3238E is available in volume now in a 0.5mm-ball-pitch TFBGA25 package. Pricing for the device is US$0.90 in quantities of 10,000 pieces.

Further information is available at www.st.com/level-translators

STMicroelectronics, 1-602-485-6100, www.st.com

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