XR-T6421 - Speakerphone Control IC
The XR-T6421 is a monolithic integrated circuit for use in high performance speakerphone systems.
It is designed to provide all control functions for the XR-T6420-1 or XR-T 6420-2 speakerphone audio circuit.
The XR-T6421 contains the level sensors and logic necessary to change the attenuation in 'th
XR-T6421 Features
* Low Current Background Noise Detection and Suppression External Control of Attach and Decay Time Constants Independent Control of Gain and Frequency Response Provides Three Level Control of Transmit & Receive Paths FUNCTIONAL BLOCK DIAGRAM VCON VOL MCR-IN MCA
* OUT NOISE TXA
* IN TXA
* OUT