1
FN7019
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143
|
Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2002. All Rights Reserved. Elantec is a registered trademark of Elantec Semiconductor, Inc.
All other trademarks mentioned are the property of their respective owners.
EL1882C
Sync Separator w/50% Slice, AGC
The EL1882C video sync separator is
manufactured using Elantec's high
performance analog CMOS process.
This device extracts sync timing information from both
standard and non-standard video input. It provides
composite sync, vertical sync, burst/back porch timing and
odd/even field detection. 50% sync tip slicing provides
precise sync edge detection when the video input level is
between 0.5V
P-P
and 2V
P-P
(sync tip amplitude 143mV to
572mV). A single external resistor sets all internal timing to
adjust for various video standards. The composite sync
output follows video in sync pulses, and a vertical sync
pulse is output on the rising edge of the first vertical serration
following the vertical pre-equalizing string. For non-standard
vertical inputs, a default vertical pulse is output when the
vertical signal stays low for longer than the vertical sync
default delay time. The odd/even output indicates field
polarity detected during the vertical blanking interval. The
EL1882C is plug-in compatible with the industry standard
LM1881 and can be substituted for that part in 5V
applications with improved 50% slicing and lower required
supply current.
Features
NTSC, PAL, SECAM, non-standard video sync separation
Precision 50% slicing of video input levels from 0.5V
P-P
to
2V
P-P
Low supply current - 1.5mA typ.
Single +5V supply
Composite, vertical sync output
Odd/Even field output
Burst/Back porch output
Plug-in compatible with industry standard LM1881 in 5V
applications
Available in 8-pin DIP and SO package
Applications
Video special effects
Video test equipment
Video distribution
Displays
Imaging
Video data capture
Video triggers
Demo Board
A dedicated demo board is not available. However, this
device can be placed on the EL4584/5 demo board.
Pinout
EL1882C
(8-PIN PDIP, SO)
TOP VIEW
Ordering Information
PART NO.
TEMP. RANGE
PACKAGE
PKG. NO.
EL1882CN
-40C to +85C
8-pin DIP
MDP0031
EL1882CS
-40C to +85C
8-lead SO
MDP0027
COMPOSITE SYNC OUT
COMPOSITE VIDEO IN
VERTICAL SYNC OUT
GND
V
DD
5V
ODD/EVEN OUTPUT
R
SET
BURST/BACK
PORCH OUTPUT
1
2
3
4
8
7
6
5
Data Sheet
January 1996, Rev A
2
MPORTANT NOTE: All parameters having Min/Max specifications are guaranteed. Typical values are for information purposes only. Unless otherwise noted, all tests
are at the specified temperature and are pulsed tests, therefore: T
J
= T
C
= T
A
Absolute Maximum Ratings
(T
A
= 25C)
V
CC
Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7V
Storage Temperature. . . . . . . . . . . . . . . . . . . . . . . .-65C to +150C
Lead Temperature (5 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260C
Pin Voltages. . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to V
CC
+0.5V
Operating Ambient Temperature Range . . . . . . . . . .-40C to +85C
Operating Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . 125C
Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .400mW
CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress only rating and operation of the
device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
DC Electrical Specifications
V
DD
= 5V, T
A
= 25C, R
SET
= 680k
, unless otherwise specified.
PARAMETER
DESCRIPTION
MIN
TYP
MAX
UNIT
I
DD
, Quiescent
V
DD
= 5V
0.75
1.5
3.0
mA
Clamp Voltage
Pin 2, Unloaded
1.35
1.5
1.65
V
Clamp Discharge Current
Pin 2 = 2V
3.2
12
16
A
Clamp Charge Current
Pin 2 = 1V
-2.0
-1.5
-0.8
mA
R
SET
Pin Reference Voltage
Pin 6
1.20
1.31
1.40
V
V
OL
Output Low Voltage
I
OL
= 1.6mA
0.4
0.8
V
V
OH
Output High Voltage
I
OH
= -40A
4
4.8
V
I
OH
= -1.6mA
2.4
3.5
Dynamic Specifications
PARAMETER
DESCRIPTION
MIN
TYP
MAX
UNIT
Comp Sync Prop Delay, t
CS
See Figure 2
10
25
40
ns
Vertical Sync Width, t
VS
Normal or Default Trigger, 50%-50%
190
270
350
s
Vertical Sync Default Delay, t
VSD
See Figure 3
35
65
85
s
Burst/Back Porch Delay, t
BD
See Figure 2
250
450
650
ns
Burst/Back Porch Width, t
B
See Figure 2
2.5
3.6
4.5
s
Input Dynamic Range
Video Input Amplitude to Maintain 50% Slice Spec
0.5
2
V
P-P
Slice Level
V
SLICE
/V
CLAMP
40
50
60
%
EL1882C
3
Pin Descriptions
PIN NUMBER
PIN NAME
FUNCTION
1
Composite Sync Out
Composite sync pulse output; sync pulses start on a falling edge and end on a rising edge.
2
Composite Video In
AC coupled composite video input; sync tip must be at the lowest potential (positive picture phase).
3
Vertical Sync Out
Vertical sync pulse output; the falling edge of vert sync is the start of the vertical period.
4
GND
Supply ground.
5
Burst/Back Porch Output Burst/back porch output; low during burst portion of composite video.
6
R
SET
(Note 1)
An external resistor to ground sets all internal timing; a 681k 1% resistor will provide correct timing for
NTSC signals.
7
Odd/Even Output
Odd/even field output; high during odd fields, low during even fields; transitions occur at start of vert
sync pulse.
8
V
DD
5V
Positive supply (5V).
NOTE:
1. R
SET
must be a 1% resistor.
EL1882C
4
Typical Performance Curves
Supply Current, Quiescent
R
SET
= 681k
I
DD
vs V
DD
R
SET
= 681k
Clamp Discharge Current
R
SET
= 681k
Clamp Charge Current
R
SET
= 681k
V
RSET
R
SET
= 681k
V
CLAMP
Voltage
R
SET
= 681k
EL1882C
5
Typical Performance Curves
(Continued)
Burst/Back Porch Width vs R
SET
V
DD
= 5V, T = 25C
Burst/Back Porch Delay vs R
SET
V
DD
= 5V, T = 25C
R
SET
vs Horizontal Frequency
Vertical Sync Width vs R
SET
V
DD
= 5V, T = 25C
Vertical Default Delay vs R
SET
V
DD
= 5V, T = 25C
EL1882C
PDF 
ZIP