TEA0675T PHILIPS [NXP Semiconductors], TEA0675T Datasheet - Page 2

• Manufacturer Part Number: TEA0675T
• Description: Dual Dolby* B-type noise reduction circuit for playback applications
• Manufacturer: PHILIPS [NXP Semiconductors]

Philips Semiconductors
FEATURES
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
ORDERING INFORMATION
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
V
I
TEA0675
TEA0675T
S
------------- -
CC
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.
CC
NUMBER
Dual Dolby* B-type noise reduction circuit
for playback applications
SYMBOL
N
+
TYPE
N
supply voltage
supply current
signal plus noise-to-noise ratio
SDIP24
NAME
SO24
plastic shrink dual in-line package; 24 leads (400 mil)
plastic small outline package; 24 leads; body width 7.5 mm
PARAMETER
DESCRIPTION
2
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:
Because of this current drain variation it is advisable to use
a regulated power supply or a supply with a long time
constant.
PACKAGE
supply voltage
noise reduction on/off
AMS on/off.
7.6
78
MIN.
26
84
Preliminary specification
TYP.
12
31
TEA0675
MAX.
SOT234-1
SOT137-1
VERSION
V
mA
dB
UNIT