參數(shù)資料
型號(hào)： TEA0675T-T
廠商： NXP SEMICONDUCTORS
元件分類： 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
文件頁數(shù)： 28/32頁
文件大小： 225K
代理商： TEA0675T-T
1996 Jun 07
5
Philips Semiconductors
Preliminary specication
Dual Dolby* B-type noise reduction circuit
for playback applications
TEA0675
FUNCTIONAL DESCRIPTION
Noise Reduction (NR) is enabled when pin HPB is
open-circuit and disabled when connected to GND via an
1.5 k
resistor.
Dolby B noise reduction only operates correctly if 0 dB
Dolby level is adjusted at 387.5 mV.
Automatic Music Search (AMS) scan mode is enabled
when pin HPA is connected to VCC via an 1.5 k resistor
and disabled when pin HPA is open-circuit. Switching AMS
on, internally NR is switched OFF simultaneously
(see Figs 5 and 6 for principle timing in AMS-scan mode).
AMS-latch mode is enabled when pin HPA is connected
to GND via an 1.5 k
resistor and disabled when pin HPA
is open-circuit. Switching AMS on, NR is switched off
internally. In this mode the device detects a pause level
signal, when a music level signal has appeared first
(see Figs 7 and 8 for principle timing). Furthermore a
longer rise time constant is supplied for suppressing the
detection of plops on tape. The output signal at pin
AMSEQ in this mode may be applied to drive a tape driver
logic circuit.
Equalization time constant switching (70
s or 120 s)
is achieved when pin AMSEQ is connected to GND via an
18 k
resistor (120 s), or left open-circuit (70 s).
This does not affect the AMS output signal during AMS
mode (see Fig.1).
Head switching is achieved when pin HS is connected
(input IN2 active) to GND via a 27 k
resistor, or left
open-circuit (input IN1 active). The 10
F capacitor at pin
HS sets the time constants for smooth switching.
In AMS mode the signals of both channels are rectified and
then added. This means, even if one channel signal
appears inverted to the other channel, the normal AMS
function is ensured. Pins HPB and HPA perform the
function of a logic input for AMS, respectively NR mode
switching in both channels and provide the frequency
dependent feedback of the control chain amplifier in the
corresponding channel. Thus it is important that no voltage
is applied to pins HPB and HPA during NR on/AMS off
mode, otherwise this will cause irregular NR
characteristics.
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 134).
Notes
1. Human body model (1.5 k
, 100 pF).
2. Machine model (0
, 200 pF).
SYMBOL
PARAMETER
CONDITIONS
MIN.
MAX.
UNIT
VCC
supply voltage
0
14
V
Vi
input voltage (except pin 11)
0.3
+VCC
V
tshort
pin 11 (Vref) to VCC short-circuiting duration
5s
Tstg
storage temperature
55
+150
°C
Tamb
operating ambient temperature
40
+85
°C
Ves
electrostatic handling voltage for all pins
note 1
2+2
kV
note 2
500
+500
V
相關(guān)PDF資料
PDF描述
TEA0678T-T B Type, DOLBY NOISE REDUCTION IC, PDSO32
TEA1101TD-T BATTERY CHARGE CONTROLLER, 100 kHz SWITCHING FREQ-MAX, PDSO16
TEA1104T-T 2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8
TEA1401T-T 1 A SWITCHING REGULATOR, 150 kHz SWITCHING FREQ-MAX, PDSO20
TEA1506AP/N1,112 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDIP8
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TEA0676 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Dual pre-amplifier and equalizer for reverse tape decks
TEA0676T 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Dual pre-amplifier and equalizer for reverse tape decks
TEA0677 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Dual pre-amplifier and equalizer for reverse tape decks
TEA0677T 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Dual pre-amplifier and equalizer for reverse tape decks
TEA0678 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Dual Dolby* B-type noise reduction circuit, automatic music search, with differential outputs and mute
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購

我的聯(lián)系方式

*
*
*