TEA0675T Datasheet | NXP Semiconductors

FEATURES - Dual noise reduction (NR) channels - Head pre-amplifiers - Reverse head switching - Automatic Music Search (AMS) - Music scan - Equalization with electronically switched time constants - Dolby reference level = 387.5 m V - 24 pins - Improved EMC behaviour. GENERAL DESCRIPTION The TEA0675 is a bipolar integrated circuit that provides two channels of Dolby B noise reduction for playback applications in car radios. It includes head and equalization amplifiers with electronically switchable time constants. Furthermore it includes electronically switchable inputs for tape drivers with reverse heads. QUICK REFERENCE DATA SYMBOL VCC ICC S+N ------------N supply voltage supply current signal plus noise-to-noise ratio PARAMETER - 78 MIN. 7.6 - 26 84 TYP. TEA0675 This device also detects pauses of music in the Automatic Music Search (AMS) scan mode, for applications with an intelligent controlled tape driver, or AMS-latch mode, for applications with a simple controlled tape driver. For both modes, the delay time can be fixed externally by a resistor. The device operates with power supplies in the range of 7.6 to 12 V, output overload level increasing with increase in supply voltage. Current drain varies with the following variables: supply voltage noise reduction on/off AMS on/off. Because of this current drain variation it is advisable to use a regulated power supply or a supply with a long time constant. MAX. 12 31 - UNIT V m A d B ORDERING INFORMATION TYPE NUMBER TEA0675 TEA0675T PACKAGE NAME SDIP24 SO24 DESCRIPTION plastic shrink dual in-line package; 24 leads (400 mil) plastic small outline package; 24 leads; body width 7.5 mm VERSION SOT234-1 SOT137-1 Remark Dolby- : Available only to licensees of Dolby Laboratories Licensing Corporation, San Francisco, CA94111, USA, from whom licensing and application information must be obtained. Dolby is a registered trade-mark of Dolby Laboratories Licensing Corporation. 1996 Jun 07 1996 Jun 07 handbook, full...