el4501 Intersil Corporation, el4501 Datasheet - Page 13

• Manufacturer Part Number: el4501
• Description: Video Front End
• Manufacturer: Intersil Corporation

Pin Descriptions
NUMBER
PIN
10
11
12
13
14
15
16
17
18
19
8
9
BACK PORCH
HORIZONTAL
SLICE MODE
COMPOSITE
ODD/EVEN
SYNC AMP
PIN NAME
VERTICAL
SYNC IN
FSEL
LOS
VSD
VS
PIN TYPE
Output
Output
Output
Output
13
Output
Output
Output
Input
Input
Input
Input
Input
Enable/bypass internal brick wall filter; a logic high is
used to enable the filter; a logic low to disable it
Input to the sync separator; connects to the video
source via a coupling capacitor or to a color burst input
filter
Loss of signal output; goes high if no input video signal
is detected
Composite sync output
Horizontal sync output
Vertical sync output
Odd/even field indicator output
Back porch output
Low = 50% slicing level; high = 70mV fixed slicing level Reference circuit 8
Amplitude of sync tip; can be used to control AGC
circuit
Digital power supply; nominally +5V
Analog power supply; nominally +5V
PIN DESCRIPTION
EL4501
Reference circuit 10
Reference circuit 8
Reference circuit 8
Reference circuit 8
Reference circuit 8
Reference circuit 8
V
SD
GND
GND
EQUIVALENT CIRCUIT
GND
V
S
CIRCUIT 10
CIRCUIT 6
CIRCUIT 7
CIRCUIT 8
CIRCUIT 9
GND
GND
V
S
V
D
V
D
V
S