TOIM3232

TOIM3000/3232 Infrared IrDA Integrated Interface Circuits ULC-Technology: High-performance gate array package using dual metal layer CMOS technology, featuring sub-micronic channel length (0.8 mm) Description The TOIM3xxx series ICs provide proper timing for the front end infrared transceiver TFDS3000, as specified by the IrDA standard. In the transmit mode, the TOIM3xxx provides IrDA-compatible electrical pulses to the infrared transceiver TFDS3000 on logic LOW electrical input. In the receive mode, the TOIM3xxx stretches received infrared pulses to the proper bit width at the operating bit rate. The IrDA bit rate varies from 2.4 to 115.2 kbit/s. rate. The output pulses are fixed at 1.627 ms or 3/16 of bit time. D For the RS232 interface, the TOIM3232 uses an external crystal clock 3.6864 MHz for its pulse stretching and shortening. The TOIM3232 is programmable to operate from 1200 bit/s to 115.2 kbit/s by the communication software through the RS232 port. Output pulses are software-programmable as either 1.627 ms or 3/16 of bit time. The typical power consumption of both circuits is very low with about 10 mW in operational state. It is in the order of magnitude of microwatts in standby mode. D For the UART interface, the TOIM3000 uses the 1.8432 MHz clock input as the fast clock and the baud clock output from the UART to do the pulse stretching and shortening. The baud clock is 16 times the baud Features TOIM3000 D Pulse shaping function (shortening and stretching) used...