XR-T6420-1
XR-T6420-1 is Speakerphone Audio Circuit manufactured by Exar.
DESCRIPTION
The XR-T6420-1 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-T6420-1 contains the audio paths prising the following: Two variable gain cells, a microphone amplifier, a transmitting amplifier, a receive amplifier, and a speaker amplifier.
FUNCTIONAL BLOCK DIAGRAM
SPC SPO Li LJ~--VEE
RVO RXC RVI_ _--'-,YI RVO
FEATURES
Two Matched Variable Gai A Cells Internal Microphone Amplifier Independent Control of Transmitting and Receiving Levels External Control of Gains and Freq- uency Response
TXO TXI TXC TVO
RX+ RX-
~VV~-------fl~MC+
MCMCO
APPLICATIONS
Speakerphones Inters Voltage Controlled Amplifiers
ABSOLUTE MAXIMUM RATINGSI
Power Supply (VCC
- VEE) Power Dissipation
Derate Above +25°C Operating Temperature Any Input Voltage Storage Temperature
+20 V l W
7 m Wt C a Oc to 70°C
VCC...
