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NTE1739

Part Number	NTE1739
Manufacturer	NTE
Published	May 9, 2005
Description	Integrated Circuit TV Horizontal/Vertical Countdown Digital Sync System
Datasheet	NTE1739 PDF File

Overview

NTE1739 Integrated Circuit TV Horizontal/Vertical Countdown Digital Sync System Features: D Horizontal Oscillator D Vertical Countdown D Composite Blanking Output D Burst–Gate Output D Horizontal Ramp Generator D Internal Shunt Regulator Description: The NTE1739 is a video sync system in a 16–Lead DIP type package designed for use in television, monitor or video display products.
The NTE1739 contains a horizontal phase–locked oscillator and vertical countdown.
It also features composite blanking and burst–gate outputs which, when externally summed, produce the sandcastle pulse necessary for the operation of most chroma/luma circuits.
The NTE1739 is intended for use in 525–line systems and operates with standard or nonstandard input signals.
An automatic mode–recognition circuit forces operation into the nonsynchronous mode for nonstandard sync input signals.
Absolute Maximum Ratings: DC Supply Current, Pin7 .
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50mA Input Voltage (All Inputs) .
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–1V to V+ + 1V Device Dissipation (TA ≤ +85°C) .
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900mW Derate Linearly Above 85°C .
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14mW/°C Operating Ambient Temperature Range .
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–40° to +85°C Storage Temperature Range .
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–65° to +150°C Lead Temperature (During Soldering, 1/16 ±1/32 in.
(1.
59 ± 0.
79mm) from case, 10s max) .
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+265°C Circuit Operation The master oscillator operates at 8 times the horizontal rate, fH, as determined by the external LC connected between Pin5 and Pin6.
The master oscillator is divided by 2, ...

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