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GS4881-IDA の電気的特性と機能

GS4881-IDAのメーカーはETCです、この部品の機能は「Monolithic Video Sync Separators」です。


製品の詳細 ( Datasheet PDF )

部品番号 GS4881-IDA
部品説明 Monolithic Video Sync Separators
メーカ ETC
ロゴ ETC ロゴ 




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GS4881-IDA Datasheet, GS4881-IDA PDF,ピン配置, 機能
GS1881, GS4881, GS4981
Monolithic Video Sync Separators
FEATURES
• 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
SELECTION CHART
APPLICATION
Direct LM1881 Replacement
with Improved Performance
New Applications
Substitution for LM1881
New Applications Requiring
Horizontal Sync Output
CHOOSE DEVICE:
GS1881
GS4881
GS4981
DATA SHEET
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.
PIN CONNECTIONS
GS1881, GS4881
GS4981
COMPOSITE
SYNC OUT
COMPOSITE
VIDEO IN
VERTICAL
SYNC OUT
GROUND
1
2
3
4
8 Vcc
7 ODD/EVEN
6 RSET
5 BACK PORCH
COMPOSITE
SYNC OUT
COMPOSITE
VIDEO IN
VERTICAL
SYNC OUT
GROUND
1
2
3
4
8 Vcc
7 HORIZONTAL
6 RSET
5 BACK PORCH
8 PIN DIP
8 PIN SOIC
Patent No. 5,432,559
Revision Date: October 1995
8 PIN DIP
8 PIN SOIC
Document No. 520 - 23 - 03
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

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GS4881-IDA pdf, ピン配列
GS4881 ELECTRICAL CHARACTERISTICS (VCC= 5 V, RSET = 680 k, TA = 25° C, unless otherwise specified)
PARAMETER
CONDITIONS
Supply Voltage
Supply Current
Video Input (Pin 2)
Outputs at Logic 1
VCC = 5 V
VCC = 12 V
(a) Signal Level
(b) Clamp Current
VCC = 5 V
Charge
Discharge - normal
- Nosync flag raised
(c) Delay to raising of Nosync flag Video input held high
(d) Sync Tip Clamp Voltage
Sync Slice Level
Relative to sync tip clamp voltage
RSET Pin Reference Voltage (Pin 6) See Note 1
Composite Sync Out (Pin 1)
Delay from Video
Back Porch Pulse Out (Pin 5)
(a) Delay from Rising
Edge of Sync
(b) Pulse Width
(c) Occurence Rate
Vertical Sync Out (Pin 3)
(a) Pulse Width
(b) Default Starting Time
Horizontal Scan Rate
Logic Outputs
(a) VOH
(b) VOL
See Note 2
CL = 15p
CL = 15p
Serrations during vertical interval
No serrations during the vertical interval
Modified RSET
IOH = 40 µA
IOH = 1.6 mA
IOL = -1.6 mA
VCC = 5 V
VCC = 12 V
VCC = 5 V
VCC = 12 V
MIN
4.5
-
-
0.5
500
9
65
64
-
70
1.14
40
400
2.0
H
197.7
48
15
4.2
11.2
2.4
9.4
-
TYP
5
4.6
5.0
MAX
13.2
6.5
7.0
UNITS
V
mA
mA
-
650
11
95
95
1.55
77
1.24
60
4
850
13
115
130
-
84
1.34
80
Vp-p
µA
µA
µA
µs
V
mV
V
ns
500 650
2.5 3.2
HH
ns
µs
197.7
65
-
197.7
82
130
µs
µs
kHz
4.6
11.6
3.4
10.4
0.3
-
-
-
-
0.6
V
V
V
V
V
Note 1: When placing the RSET resistor and the 0.1µF decoupling capacitor careful attention should be made to ensure that they are as close
as possible to pin 6. Care should also be taken to avoid parasitic capacitive coupling from any output pin (pins 1, 3, 5 and 7) to pin 6.
Note 2: Measured from slicing point of input falling edge to 50% point of composite sync falling edge.
ORDERING INFORMATION
Part Number
GS4881 - CDA
GS4881 - CKA
GS4881 - CTA
GS4881 - IDA
GS4881 - IKA
GS4881 - ITA
Package Type
8 PDIP
8 SOIC
8 TAPE
8 PDIP
8 SOIC
8 TAPE
Temperature Range
0° to 70° C
0° to 70° C
0° to 70° C
-25° to 85° C
-25° to 85° C
-25° to 85° C
3 520 - 23 - 03


3Pages


GS4881-IDA 電子部品, 半導体
TEMPERATURE CHARACTERISTICS (VS = 5V, RSET = 680 kunless otherwise shown)
Commercial Temperature Range (0 - 70 °C)
10
8
6
4
2
0
-2
-4
-6
-25 -15 -5
5 15 25 35 45 55 65 75 85
TEMPERATURE (°C)
Fig. 7 Composite Sync Delay Variation
vs Temperature
30
20
10
0
-10
-20
-25 -15 -5 5 15 25 35 45 55 65 75 85
TEMPERATURE (°C)
Fig. 9 Back Porch Delay Variation
vs Temperature
25
20
15
10
5
0
-5
-25 -15
520 - 23 - 03
-5 5 15 25 35 45 55 65 75
TEMPERATURE (°C)
Fig. 11 Horizontal Delay Variation
vs Temperature
85
6
850
740
650
550
450
350
-25 -15 -5
5 15 25 35 45 55
TEMPERATURE (°C)
65 75 85
Fig. 8 Clamping Current vs Temperature
125
100
75
50
25
0
-25
-50
-75
100
-125
-25 -15 -5
5 15 25 35 45 55 65 75 85
TEMPERATURE (°C)
Fig. 10 Back Porch Width Variation
vs Temperature
600
500
400
300
200
100
0
-100
-200
-300
-25 -15
-5 5 15 25 35 45 55 65 75
TEMPERATURE (°C)
Fig. 12 Horizontal Width Variation
vs Temperature
85

6 Page



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部品番号部品説明メーカ
GS4881-IDA

Monolithic Video Sync Separators

ETC
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