Vishay Intertechnology Inc. (Malvern, PA) announced a new pulse-shaping integrated circuit (IC) for IrDA data transmission implementations that will act as a pin-to-pin compatible successor to the popular TOIM3232 serial infrared (SIR) interface IC. Built on an advanced CMOS technology with sub-micron channel lengths of 0.35µm, and featuring a lower supply voltage of 3.3V in an unchanged logical design, the new Vishay Telefunken TOIM4232 lowers power consumption for the pulse-shaping function in UART-related IrDA SIR applications. Target end products for the new device will include dongles, PDAs, infrared bar code readers, and other infrared-enabled portable computing and communications systems.
The TOIM4232 IC provides pulse shaping for front-end IR transceivers in Vishay’s 4000 Series as specified by the IrDA standard, acting as a direct interface between the 4000 Series SIR receiver and a UART or an added level shifter RS232 port. In transmit mode, the new integrated circuit shortens the UART/RS232 output signal to IrDA-compatible pulses of 1.6µs or 3/16 of the bit duration required to drive the IR transmitter. In receive mode, the TOIM4232 stretches IR pulses to bit widths appropriate to the current operating bit rate, which may range from 1.2kbit/s to 115.2kbit/s, including all IrDA-SIR bit rates.
The TOIM4232 features 5V tolerant inputs and a very low typical power consumption of 10mW, which drops to just a few microwatts in standby mode. The TOIM4232 is designed in an SO-16 package.
Samples and production quantities of the Vishay Telefunken TOIM4232 are available now with lead times of 10 weeks for larger orders.
