M66242FP

MITSUBISHI MITSUBISHI 〈DIGITAL 〈DIGITAL ASSP ASSP 〉 〉 M66242P/FP M66242P/FP 4-CH 12-BIT PWM GENERATOR 4-CH 12-BIT PWM GENERATOR DESCRIPTION M66242 Integrated Circuit has four 12-bit PWM (pulse width modulation) circuits which are built by using the CMOS (complementary metal oxide semiconductor) process. This IC controls PWM waveform by adjusting the “H” width according to serial data sent from MCU (micro controller unit) or other device. Each channel can be independently controlled. High-resolution digital-analog converter can be formed easily by connecting a low-pass filter circuit to the output pins of this circuit. FEATURES Built-in four 12-bit high-resolution pulse width modulation circuits Easy digital-analog conversion – Quick output waveform smoothing Control by 1.22mV possible per step (VCC =5V) Serial data input “H” level width setting type 4 independently controlled channels All 4 channels reset by reset input (R) High-impedance status after reset All 4 channels controlled by output control input (OC) Settings take effect after ongoing cycle is completed Input: TTL level Output: CMOS 3-state output Output current IO = ±4mA VCC =5V ± 10% BLOCK DIAGRAM (EACH CHANNEL) PIN CONFIGURATION (TOP VIEW) CHIP SELECT CS R RESET WRITE CONTROL WR SERIAL DATA INPUT SIN WRITE CLOCK SCLK OUTPUT CONTROL OC GND 1 2 3 4 5 6 7 14 13 12 11 10 9 8 VCC PWM1 PWM2 OUTPUT PWM3 PWM4 XOUT CLOCK OUTPUT XIN CLOCK INPUT Outline 14P4 14P2N-A APPLICATION Analog signa...