EL4501CU ELANTEC [Elantec Semiconductor], EL4501CU Datasheet - Page 7

• Manufacturer Part Number: EL4501CU
• Description: Video Front End
• Manufacturer: ELANTEC [Elantec Semiconductor]

Pin Description
Number
Pin
10
12
13
14
15
17
18
19
20
21
22
23
24
11
1
2
3
4
5
6
7
8
9
VFB
VIDEO_IN
DS_MODE
DS_ENAB
GND
GND
R
FSEL
SYNC_IN
LOS
COMPOSITE
HORIZONTAL
VERTICAL
ODD/EVEN
BACK_PORCH
SYNC_AMP
V
V
REF-OUT
REF_IN
DS_REF
DS_OUT
VIDEO_OUT
FREQ
SD
S
Pin Name
D
Input
Input
Input
Input
Input
Input
Input
Input
Input
Output
Output
Output
Output
Output
Output
Output
Input
Input
Output
Input
Input
Output
Output
Pin Type
Connection for gain and feedback resistors, R
Input to DC restore amplifier. Input coupling capacitor connects from here to video source.
Sets the mode of the DS comparator. Logic high selects a standard logic output. Logic low selects an open
drain/collector.
Enables the output of the comparator. A logic high enables the comparator. A logic low tri-states it.
Analog ground.
Digital ground
Connection for bias resistor that sets the overall timing.
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.
Amplitude of sync tip. Can be used to control AGC circuit.
Digital power supply. Nominally +5V
Analog power supply. Nominally +5V.
Voltage reference for use as blanking level in low cost system
Dc voltage on this pin sets the DC restore voltage and output blanking level.
Sets the slicing level or reference level for the comparator.
Output of the data slicing comparator. The output is either open drain/collector or standard symmetrical logic
depending on the DS_MODE pin.
Output of DC restore amplifier.
7
EL4501C - Preliminary
F
and R
Pin Description
G
.
Video Front End