Electronic Volume Controller
TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic
TC9235P,TC9235F
TC9235P/F
Electronic Volume Control IC
The...
Description
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...
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