NTE7049
Integrated Circuit
CMOS鈥揝ync Generator for TV & Video
Processing Systems
Description:
The NTE7049 is a CMOS LSI sync generator in a 24鈥揕ead DIP type package that produces all the timing sig-
nals required to drive a fully 2鈥搕o鈥? interlaced 525鈥搇ine 30鈥揻rame/second, or 625鈥搇ine 25鈥揻rame/second TV
camera or video processing system. A complete sync waveform is produced which begins each field with six
serrated vertical sync pulses, preceded and followed by six half鈥搘idth double frequency equalizing pulses.
The sync output is gated by the master clock to preserve horizontal phase continuity during the vertical interval.
The NTE7049 can be operated either in 鈥済enlock鈥?mode, in which it is synchronized with a reference sync pulse
train from another TV camera, or in 鈥渟tand鈥揳lone鈥?mode, in which it is synchronized with a local on鈥揷hip crystal
oscillator (the crystal and two passive components are off chip). Also, the circuit can sense the presence or
absence of a reference sync pulse train and automatically select the 鈥済enlock鈥?or 鈥渟tand鈥揳lone鈥?mode.
A frame sync pulse is produced at the beginning of every odd field. The vertical counter can be reset to either
the first equalizing pulse or the first vertical sync pulse of the vertical interval.
Features:
D
Interlaced Composite Sync Output
D
Automatic Genlock Capability
D
Crystal Oscillator Operation
D
525 or 625 Line Operation
D
Vertical Reset Option
D
Wide Power Supply Operating Voltage: 4V to 15V
Applications:
D
Cameras
D
Monitors and Displays
D
CATV
D
Teletext
D
Video Games
D
Sync Restorer
D
Video Service Instruments
Absolute Maximum Ratings:
DC Supply Voltage (Voltage referenced to V
SS
terminal), V
DD
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15V
Input Voltage Range (All Inputs), V
I
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V
SS
鈮?/div>
V
I
鈮?/div>
V
DD
DC Input Current (Any One Input), I
I
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
鹵10mA
Power Dissipation (T
A
= 鈥?0擄 to +60擄C), P
D
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500mW
Derate Linearly Above +60擄C to 200mW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12mW/擄C
Device Dissipation Per Output Transistor (T
A
= 鈥?0擄 to +85擄C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100mW
Operating Temperature Range, T
A
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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
鹵1/32
from case for 10sec), T
L
. . . . . . . . . . . . . . . . . . . . . . +265擄C
1
2
3
