TC9235F

TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic TC9235P,TC9235F TC9235P/F Electronic Volume Control IC The TC9235P/F is an electronic volume control IC developed for use in audio equipment such as car stereo and portable stereo system. Features Attenuation can be controlled from 0dB to −78dB by up, down input. This IC have 20dB tap for loudness circuit. This IC features a built-in DC output circuit (7 level) for volume level meter. Polysilicon resistors enables low-distortion, high-performance volume systems. Volume level remains in backup mode with low current consumption. Package is DIP16 and SOP16. Pin Assignment TC9235P TC9235F Weight DIP16-P-300-2.54A: 1.0 g (typ.) SOP16-P-300-1.27: 0.16 g (typ.) Block Diagram 1 2003-06-24 Pin Function TC9235P/F Pin No. Symbol 1 VSS 16 VDD 2 OUT-1 15 OUT-2 3 IN-1 14 IN-2 4 TP-1 13 TP-2 5 GND-1 12 GND-2 6 UP 7 DN 8 OSC 9 INT 10 INH 11 DC-OUT Pin Name Negative power supply pin Positive power supply pin Function and Operation Power supply terminal Volume output pins Volume circuit Note  Volume input pins Tap output pins for loudness  Analog ground pins Volume up input pin Volume up, down control input pin. Volume down input pin The 1 step/1 push volume is controlled by pushing the Built-in pull-up resistor Up or Down key. If the key has been pushed continuously, the continuous volume control. Oscillation pin Oscillation pin. Oscillator circuit consist of C･R connection.  Oscillation is execu...