XR-T6420-2

XR-T6420-2 Speakerphone Audio Circuit GENERAL DESCRIPTION The XR-T6420-2 is a monolithic integrated circuit for use in high performance speakerphone systems. It is designed to be used with the XR-T6421 Speakerphone Control Circuit. The XR-T6420-2 contains the audio paths comprising the following: Two variable gain cells, a microphone amplifier, a transmitting amplifier, a receive amplifier, and a speaker amplifier. Mute and enable control logic of the variable gains cells is provided internally. FEATURES Two Matched Variable Gain Cells Internal Microphone Amplifier Independent Control of Transmitting and Receiving Levels External Control of Gains and Frequency Response Enable and Mute Logic Pins APPLICATIONS Speakerphones Intercoms Voltage Controlled Amplifiers ABSOLUTE MAXIMUM RATINGS Power Supply (VCC - VEE) Power Dissipation Derate Above +25°C Operating Temperature Any Input Voltage Storage Temperature +30 V lW 7 mWtC O°Cto 70°C VCC - 0.5 V to VEE + 0.5 V -55°C to +150°C ...