www.DataSheet4U.com IS1, IS5, IS74 ISD1, ISD5, IS.
SC16IS741 - Single UART with I2C-bus/SPI interface
IS74 - HIGH DENSITY PHOTOTRANSISTOR OPTICALLY COUPLED ISOLATORS
SC16IS740 - Single UART with I2C-bus/SPI interface
SC16IS741A - Single UART
TIS74 - N-Channel General Purpose Amplifier