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NTE1728 Datasheet(PDF) 1 Page - NTE Electronics

Part No. NTE1728
Description  Integrated Circuit VIF & SIF Circuit for VCR
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Manufacturer  NTE [NTE Electronics]
Direct Link  http://www.nteinc.com
Logo NTE - NTE Electronics

NTE1728 Datasheet(HTML) 1 Page - NTE Electronics

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NTE1728
Integrated Circuit
VIF & SIF Circuit for VCR
Description:
The NTE1728 is an integrated circuit in a 30–Lead DIP type package containing the VIF section and
SIF on a single chip. Since this device is capable of performing video detection and sound detection
independently or simultaneously, it can be applied to various sets from popular type to high–grade
type according to the designer’s policy.
Features:
D High–Gain VIF Amp Requiring No Preamp
D High AGC Speed
D Provides Wide–Band Detection Characteristics and Meets Sound MPX Demodulation Requirements
because of FM Detection being Quadrature Detection.
D Possible to use Sound REC Pin (Pin2), AUX Pin (Pin3)
D Possible to Mute Video, Sound for VCR
D Pin7 GND: Muting of both Video and Sound
D Pin29 GND: Muting of Sound Only
Functions:
D VIF Section: VIF Amp Video Det, Peak IF AGC, B/W Noise–Canceller, RF AGC, AFT, SIF DET
D SIF Section: SIF Limiter Amp, FM Det, DC ATT, AF Driver
Operating Characteristics: (TA = +25°C, VCC = 12V, fp = 58.75MHz, fs = 54.25MHz (VIF),
fo = 4.5MHz (SIF) unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
VIH Section
Total Circuit Current
I23 + I24 DC
59
74
98
mA
Maximum RF AGC Voltage
VH13H
DC
8.5
8.9
9.2
V
Minimum RF AGC Voltage
V13L
DC
0
0.5
V
Quiescent Video Output Voltage
V22
DC
5.6
6.1
6.6
V
Quiescent AFT Output
V17
DC
4.5
6.5
7.5
V
Input Sensitivity
Vi
fm = 400Hz 40% AM, VO = 0.8Vpp
30
36
42
dB
µ
AGC Range
GR
fm = 15kHz 78% AM, VO = ±1dB
60
74
dB


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