MM1336

MITSUMI IC for Headphone Stereos (with volume-limiting circuit) MM1336 IC for Headphone Stereos (with volume-limiting circuit) Monolithic IC MM1336 Outline This IC was developed for use in 3V headphone stereos. In addition to the basic functions required by headphone stereos, it incorporates a circuit for limiting volume. In some parts of Europe hearing impairment caused by the high volumes of headphone stereos has become a problem, and there has been strong demand for functions for limiting loud volumes in the sets themselves. This trend is expected to gain momentum in the U.S. as well. This IC uses an internal ALC circuit to suppress headphone stereo output, avoiding the above problem. Features 1. Configuration: Pre-and power amps, ALC circuit, motor control 2. Internal tape selector: A selector switch allows the user to select between normal and metal tapes. 3. Internal OCL circuit: There is no need for a capacitor for high-volume output, so sets can be kept thin. 4. With preamp off pin while connected to radio 5. Designed for low shock noise Reduced noise occuring when the power supply is turned on and off Package SOP-28B (MM1336CF, MM1336DF) Pin Assignment 1 2 3 4 5 6 7 8 9 10 11 12 13 14 COM1 PIN1 PNF1 PBU1 POUT1 IN1 RECT AVNF OUT1 COM2 GND1 GND2 PCOUT PHASE 15 16 17 18 19 20 21 22 23 24 25 26 27 28 VS C VCC2 OUT2 VCC1 RF Pre OFF N/M IN2 POUT2 PBU2 PNF2 PIN2 GND3 28 27 26 25 24 23 22 21 20 19 18 17 16 15 1 2 3 4 5 6 7 8 9 10 11 12 13 14 SOP-28B Absolute Maximum...