Overview
The LC75347E is a 6-channel 97-step electronic volume control system IC that provides a 2-channel input selector, bass and treble tone controls, external output ports, and a zero-cross volume switching function.
Functions
⢠Volume: 0 to â95 dB (in 1 dB steps) and ââ, for a total of 97 positions. Each of the six input channels can be controlled independently.
⢠Bass and treble: Each band can be controlled over a ±12 dB range in 2 dB steps. The bass control provides peaking characteristics and the treble control provides shelving characteristics.
⢠Selector: 2-channel input selector
⢠Zero cross: Provides independent zero-cross detection for each of the 6 channels and a timer overflow detection circuit.
⢠External muting: Mute in/mute out function using zero cross detection and dedicated pins.
⢠External output ports: Provides 4 n-channel transistor open-drain outputs.
Features
⢠Built-in buffer amplifiers reduce the number of external components to a minimum.
⢠Fabricated in a silicon-gate CMOS process for minimal noise generation from internal switches
⢠Built-in analog ground reference voltage generator circuit
⢠All settings are controlled by serial data transmitted over a CCB interface.
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