The NTE843 is a linear IC synchronous detector employing a phase鈥搇ocked oscillator to demodulate
the 45.75MHz video IF signals in color鈥揟V receivers. The NTE843 features AFT voltage for DC con-
trol of the tuner; an adjustment for the zero鈥揷arrier DC level at the video output terminal; an amplifier
arrangement for inverting noise impulses toward the black level; and a separate output terminal (non鈥?/div>
inverting) for the sound IF.
The NTE843 is supplied in a 16鈥搇ead plastic 鈥減ower鈥搒lab鈥?dual鈥搃n鈥搇ine package.
The 鈥減ower鈥搒lab鈥?package has an inherently low junction鈥搕o鈥揷ase (slab) thermal resistance and
lends itself to a wide variety of heat鈥搒ink methods, depending on the application requirements.
Features:
D
PLL Carrier Oscillator with Wide Pull鈥揑n and Hold鈥揑n Range
D
Excellent Low鈥揕evel Detector Linearity
D
Noise Inversion at Video Output
D
Wide Range, Variable Zero鈥揅arrier Level Adjustment
D
Automatic Fine Tuning (AFT) Detector
D
Separate Output for Sound Take鈥揙ff
D
12V Power Supply
Absolute Maximum Ratings:
Power Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15V
Power Supply Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100mA
Input Signal Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1V
rms
Device Dissipation (Up to T
A
= +45擄C), P
D
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.4W
Derate Above T
A
= +45擄C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.3mW/擄C
Thermal Resistance, Junction鈥搕o鈥揂mbient, R
thJA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75擄C/W
Operating Ambient Temperature Range, T
opr
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 鈥?0擄 to +85擄C
Storage Temperature Range, T
stg
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 鈥?5擄 to +150擄C
Lead Temperature (During Soldering, 1/16鈥?from case, 10sec max), T
L
. . . . . . . . . . . . . . . . . +265擄C
1
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