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Miniaturized encoder/decoder eyes IrDA wireless comms

Posted: 13 Aug 2008 ?? ?Print Version ?Bookmark and Share

Keywords:encoder/decoder miniaturized? IrDA? wireless communications?

Vishay Intertechnology Inc. continues to broaden its optoelectronics portfolio with the release of a new miniaturized encoder/decoder for serial infrared (IrDA) wireless communication, the TOIM5232.

The new device provides proper pulse shaping of RS-232 data signals for serial infrared (SIR) IrDA transceivers and supports data rates from 1.2Kbit/s to 115.2Kbit/s. Offered in the QFN (quad flat no leads) package, which measures 4mm x 4mm x 0.75mm, the TOIM5232 features the same operation and performance as the TOIM4232 in a fraction of the space.

Typical applications for the TOIM5232 will include wirelessly enabled data loggers and utility meters; IrDA communication in mobile phones, notebook computers, PDAs, and other consumer electronics; and medical applications such as glucose meters and home diagnostic meters.

The TOIM5232 features an operating voltage range of 2.7-3.6V with 5V tolerant inputs. Maximum current consumption in standby mode is a very low 1?A. A programmable baud clock generator gives designers a choice of 13 baud rates from 1200Hz to 115kHz or an external clock may be used.

In transmit mode, the TOIM5232 shortens RS-232 output signals to IrDA-compatible electrical pulses to drive an infrared transmitter. In receive mode, the TOIM5232 stretches the received infrared pulses to the proper bit width, depending on the operating bit rate. The TOIM5232 is software programmable through the RS-232 port and needs no external wiring for the baud rate setting.

Samples and production quantities of the TOIM5232 are available now, with lead times of eight to 10 weeks for large orders.





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