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TEA0675T Datasheet

Dual Dolby* B-type noise reduction circuit for playback applications

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INTEGRATED CIRCUITS
DATA SHEET
TEA0675
Dual Dolby* B-type noise reduction
circuit for playback applications
Preliminary specification
Supersedes data of July 1993
File under Integrated Circuits, IC01
1996 Jun 07


NXP Semiconductors Electronic Components Datasheet

TEA0675T Datasheet

Dual Dolby* B-type noise reduction circuit for playback applications

No Preview Available !

Philips Semiconductors
Dual Dolby* B-type noise reduction circuit
for playback applications
Preliminary specification
TEA0675
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 mV
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.
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.
QUICK REFERENCE DATA
SYMBOL
VCC
ICC
S------N+-----N---
PARAMETER
supply voltage
supply current
signal plus noise-to-noise ratio
MIN.
7.6
78
TYP.
26
84
MAX.
12
31
UNIT
V
mA
dB
ORDERING INFORMATION
TYPE
NUMBER
TEA0675
TEA0675T
NAME
SDIP24
SO24
PACKAGE
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
2


Part Number TEA0675T
Description Dual Dolby* B-type noise reduction circuit for playback applications
Maker NXP
Total Page 30 Pages
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