DESCRIPTION
The SA1140 is an IF system IC designed for FM car stereo receivers. It features  versatile  muting  characteristics  which  can  be  varied  with external parts.

FEATURES
*  Muting characteristics
a)   Muting operation is performed under weak signal strength.
b)  Maximum  muting  attenuation  can  be  selected  to  be approximately 6 to 40 dB.
c) Input signal strength level which actuates the muting circuit can be set freely.
* High limiting sensitivity
* High S/N (78 dB typ.)
* Good AMR
* Signal meter drive output proportional to the input signal strength in dB (suitable to  control multiplex IC SA3370).

APPLICATIONS
* FM car stereo  receivers, FM home radio