參數(shù)資料
型號(hào)： TEA0675T-T
廠商： NXP SEMICONDUCTORS
元件分類(lèi)： 噪聲抑制
英文描述： B Type, DOLBY NOISE REDUCTION IC, PDSO24
封裝： 7.50 MM, PLASTIC, MS-013AD, SOT-137-1, SOP-24
文件頁(yè)數(shù)： 12/32頁(yè)
文件大?。?/td> 225K
代理商： TEA0675T-T
1996 Jun 07
2
Philips Semiconductors
Preliminary specication
Dual Dolby* B-type noise reduction circuit
for playback applications
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
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.
SYMBOL
PARAMETER
MIN.
TYP.
MAX.
UNIT
VCC
supply voltage
7.6
12
V
ICC
supply current
26
31
mA
signal plus noise-to-noise ratio
78
84
dB
TYPE
NUMBER
PACKAGE
NAME
DESCRIPTION
VERSION
TEA0675
SDIP24
plastic shrink dual in-line package; 24 leads (400 mil)
SOT234-1
TEA0675T
SO24
plastic small outline package; 24 leads; body width 7.5 mm
SOT137-1
SN
+
N
--------------
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