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參數(shù)資料
| 型號(hào)： | GS4981-ITA |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Monolithic Video Sync Separators |
| 中文描述： | 單片視頻同步分離器 |
| 文件頁數(shù)： | 1/14頁 |
| 文件大?。?/td> | 279K |
| 代理商： | GS4981-ITA |
Document No. 520 - 23 - 03
DATA SHEET
GENNUM CORPORATION P.O. Box 489, Stn A, Burlington, Ontario, Canada L7R 3Y3 tel. (905) 632-2996 fax: (905) 632-2055
Japan Branch: A-302 Miyamae Village, 2-10-42 Miyamae, Suginami-ku, Tokyo 168, Japan tel. (03) 3247-8838 fax (03) 3247-8839
FEATURES
GS1881, GS4881, GS4981
Monolithic Video Sync Separators
DESCRIPTION
The GS1881, GS4881 and GS4981 are general purpose sync
separators for use in a wide variety of video applications. The
devices extract the timing information from composite video
signals with scan rates from 15 to 130 kHz.
The GS1881 is a drop-in replacement for the industry standard
LM1881 with much improved performance. The device
generates composite sync, vertical sync, back porch and
odd/even field signals. The GS4881 is identical to the GS1881
but features a noise immune back porch pulse which maintains
a constant H rate during the vertical interval. The GS4981 is
identical to the GS4881, except that it provides horizontal sync
in place of the odd/even output.
All three devices feature a self-adjusting windowing circuit for
noise immunity, which synchronizes to H rate. This
windowing circuit determines the odd or even field
in the GS1881 and GS4881, gates the back porch pulse in
the GS4881 and GS4981, and generates the horizontal sync
output in the GS4981.
The devices feature an improved input stage which ensures
that the input signal is sliced at a predictable point due to
well-controlled input clamp discharge current and sync
slicing level. A missing pulse detector enables the devices to
recover quickly from impulse noise disturbances by temporarily
increasing the clamp discharge current by roughly ten times.
The input stage will operate with signals from 0.5 to 4 volts
peak to peak with a 5 volt supply.
The GS1881, GS4881 and GS4981 also feature a predictable
vertical output pulse width with a default trigger for non-standard
video signals. All three are available in commercial and
industrial temperature ranges and are packaged in both DIP
and SOIC.
noise tolerant odd/even flag, back porch and
horizontal sync pulse
fast recovery from impulse noise
excellent temperature stability
0.5 V to 4 Vpp input signal amplitude with 5 V
supply
well-controlled clamp discharge current and
slicing level
programmable horizontal scan rate (up to 130 kHz)
composite, vertical, back porch, odd/even
(GS1881, GS4881), horizontal (GS4981) outputs
predictable vertical output pulse width with
default trigger for non-standard video signals
5 V to 12 V supply voltage range
pin compatible with LM1881 sync separator
APPLICATION CHOOSE DEVICE:
Direct LM1881 Replacement
with Improved Performance
GS1881
New Applications
Substitution for LM1881
GS4881
New Applications Requiring
Horizontal Sync Output
GS4981
SELECTION CHART
R
SET
BACK PORCH
ODD/EVEN
GROUND
V
cc
8 PIN DIP
8 PIN SOIC
COMPOSITE
SYNC OUT
COMPOSITE
VIDEO IN
VERTICAL
SYNC OUT
1
2
3
4
8
7
6
5
R
SET
BACK PORCH
GROUND
V
cc
8 PIN DIP
8 PIN SOIC
GS4981
COMPOSITE
SYNC OUT
COMPOSITE
VIDEO IN
VERTICAL
SYNC OUT
1
2
3
4
8
7
6
5
HORIZONTAL
GS1881, GS4881
PIN CONNECTIONS
Revision Date: October 1995
Patent No. 5,432,559
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PDF描述 |
|---|---|
| GS1881 | Monolithic Video Sync Separators |
| GS1881-CDA | Monolithic Video Sync Separators |
| GS1881-CKA | Monolithic Video Sync Separators |
| GS1881-CTA | Monolithic Video Sync Separators |
| GS1881-IDA | Monolithic Video Sync Separators |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| GS4981-ITAE3 | 制造商:Semtech Corporation 功能描述:TAPE & REEL Sync Separators |
| GS4982 | 制造商:GENNUM 制造商全稱:GENNUM 功能描述:Video Sync Separators with 50% Sync Slicing |
| GS4982-CDA | 制造商:Rochester Electronics LLC 功能描述: 制造商:Gennum Corporation 功能描述: |
| GS4982-CKA | 制造商:GENNUM 制造商全稱:GENNUM 功能描述:Video Sync Separators with 50% Sync Slicing |
| GS4982-CKAE3 | 制造商:Gennum Corporation 功能描述:Video Sync Separator 8-Pin SOIC |
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