LM1276 National Semiconductor Corporation, LM1276 Datasheet - Page 14

• Manufacturer Part Number: LM1276
• Description: 150 Mhz I2c Compatible Rgb Preamplifier With Internal 512 Character Osd Rom, 512 Character Ram And 4 Dacs
• Manufacturer: National Semiconductor Corporation

www.national.com
Pin
No.
10
11
14
12
13
15
16
17
Pin Descriptions and Application Information
Digital Ground
Digital Ground
Digital V
Digital V
Pin Name
PLL V
H Sync
SCL
SDA
CC
CC
CC
Schematic
14
(Continued)
The ground pin should be connected to the rest
of the circuit ground by a short but independent
PCB trace to prevent contamination by
extraneous signals. The PLL V
isolated from the rest of the V
bead and bypassed to pin 8 with an electrolytic
capacitor and a high frequency ceramic.
Ground pin and power supply pin for the digital
portion of the LM1276. Note the recommended
charge storage and high frequency capacitors,
which should be as close to pins 11 and 14 as
possible.
The I
of about 2.2 kΩ should be connected between
this pin and V
should be connected in series with the clock line
for additional ESD protection.
The I
of about 2.2 kΩ should be connected between
this pin and V
should be connected in series with the data line
for additional ESD protection.
Logic level horizontal sync signal received from
the MCU or sync stripper circuit. This input can
also be derived from the clamp input as long as
it is a logic level signal.
Ground pin and power supply pin for the digital
portion of the LM1276. Note the recommended
charge storage and high frequency capacitors,
which should be as close to pins 16 and 17 as
possible.
2
2
C compatible clock line. A pull-up resistor
C compatible data line. A pull-up resistor
CC
CC
. A resistor of at least 100Ω
. A resistor of at least 100Ω
Description
CC
CC
line by a ferrite
pin should be