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LM2467 bảng dữ liệu(PDF) 13 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
tên linh kiện LM2467
Giải thích chi tiết về linh kiện  150 MHz I2C Compatible RGB Preamplifier with Internal 254 Character OSD ROM, 512 Character RAM and 4 DACs
PDF  43 Pages
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nhà sản xuất  NSC [National Semiconductor (TI)]
Trang chủ  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM2467 bảng dữ liệu(HTML) 13 Page - National Semiconductor (TI)

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Pin Descriptions and Application Information (Continued)
Pin
No.
Pin Name
Schematic
Description
23
CLAMP
This pin accepts either TTL or CMOS logic
levels. The internal switching threshold is
approximately one-half of V
CC. An external
series resistor, R
31, of about 1K is recommended
to avoid overdriving the input devices. In any
event, R
EXT must be large enough to prevent the
voltage at pin 23 from going higher than V
CC or
below GND.
24
H Flyback
Proper operation requires current reversal. R
H
should be large enough to limit the peak current
at pin 24 to about +4 ma during blanking, and
−500 µA during scan. C
17 is usually needed for
logic level inputs and should be large enough to
make the time constant, R
HC17 significantly
larger than the horizontal period. R
34 and C8 are
typically 300
Ω and 330 pF when the flyback
waveform has ringing and needs filtering. C
18
may be needed to filter extraneous noise and
can be up to 100 pF.
www.national.com
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