EL4581C Elantec Semiconductor, Inc. (acquired by Intersil), EL4581C Datasheet - Page 3

• Manufacturer Part Number: EL4581C
• Description: Video SYNC Separator
• Manufacturer: Elantec Semiconductor, Inc. (acquired by Intersil)

Dynamic Characteristics
V
Note 3 C S Vertical and Burst outputs are all active low
Note 4 Attenuation is a function of Rset (PIN6)
Note 5 Typical min is 0 3 V
Note 6 Refers to threshold level of sync tip to back porch amplitude
Pin Descriptions
Note R
Pin No
DD
Vertical Sync Width t
Burst Back Porch Width t
Vertical Sync Default Delay t
Filter Attenuation
Composite Sync Prop Delay
Input Dynamic Range
Slice Level
1
2
3
4
5
6
7
8
e
SET
5V I
Composite Sync Out
Composite Video in
Vertical Sync Out
GND
Burst Back Porch Output
R
Odd Even Output
V
must be a 1% resistor
V
Parameter
DD
SET
pk-pk video T
5V
Pin Name
VS
P-P
A
B
e
VSD
25 C C
Composite sync pulse output Sync pulses start on a falling edge and end on a rising edge
AC coupled composite video input Sync tip must be at the lowest potential (Positive
picture phase)
Vertical sync pulse output The falling edge of Vert Sync is the start of the vertical period
Supply ground
Burst Back porch output Low during burst portion of composite video
An external resistor to ground sets all internal timing 681k 1% resistor will provide correct
timing for NTSC signals
Odd Even field output Low during odd fields high during even fields Transitions occur at
start of Vert Sync pulse
Positive supply (5V)
(Note 3)
(Note 3)
F
V
(Note 3)
p-p NTSC Signal
(Note 5)
Input Voltage
(Note 6)
L
IN
IN
e
b
e
15 pF I
Description
Composite Sync
3 4 MHz (Note 4)
Sync Separator 50% Slice S-H Filter
OH
e
e b
1V
b
P-P
V
1 6 mA I
OH
3
e
2 4V V
Temp
OL
25 C
25 C
25 C
25 C
25 C
25 C
25 C
Full
e
OL
1 6 mA Signal voltages are peak to peak
Function
e
Min
40%
40%
190
2 5
0 5
40
0 8V
Typ
50%
50%
230
260
3 5
55
24
EL4581C
Max
60%
60%
300
400
4 5
70
2
Level
Test
IV
V
I
I
I
I
I
I
Units
dB
ns
V
s
s
s