Exar Corporation XR-T6421
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 'the transmitting or receiving path in order to avoid acoustic feedback.| Part No. | XR-T6421 |
|---|---|
| Datasheet | XR-T6421 Download |
| Manufacturer |  Exar Corporation |
| Description | Speakerphone Control IC |
| Buy | Stock & Price |
GENERAL DESCRIPTION
Circuitry is included to detect bacground noise level and provide a preset amount of attenuation in each path when no voice is present.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 CMPBTHB CMPB+ SIGNAL CMPA+ THA A●OUT VAEF AXA●OUT AXA●IN HPF●OUT HPF●IN A●IN ORDERING INFORMATION Part Number XR-T6421CN XR-T6421
