NS741

www.DataSheet4U.com Engineering Division TEL:+81-3-3437-3570 FAX:+81-3-3437-5622 http://www.niigata-s.co.jp 06/09/25 P. 1/2 NS741 Catalog NS741 is the low-power FM band transmitter with which the left and right audio signals can be modulated in FM with stereo multiplexing. Features: Chip Description: NS741 is the low-power FM band transmitter which enables the RDS (Radio Data System) data transmission. It is manufactured by full CMOS process. The built-in DSP realizes stable stereo signal generation and RDS data attachment. The direct modulation (the modulation by directly providing the audio signal to the MOS varactor which constitutes the resonant circuit of the local oscillation circuit) is employed. I2C or 3-wire can be applied to the interface with CPU. Transmitting frequency coverage: 76.1 to 108.0 MHz Stereo modulation Direct Frequency Modulation RDS transmission, available ALC (Automatic Level Control) function in Analog input Less external components Crystal oscillator: 32.768kHz External reference frequency input, available (19.2 and 32.768 kHz) Built-in MOS Varactor for local oscillator Modulation index, adjustable by MPU I2C bus or 3-wire serial interface with MPU Easy control of software programming Operating Voltage: 2.7 to3.6V (3.0V typ.) Low Power Consumption: 17mA (typ.) Operating Temperature: -30 to +85 degC Package: 35-pin Wafer Level Package and 36-pin QFN Package Full CMOS process RF output program, variable (APC) Applications: Wireless microphone Po...