參數(shù)資料
型號: GS1881-CDA
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): 4/14頁
文件大小: 279K
代理商: GS1881-CDA
4
520 - 23 - 03
Supply Voltage
4.5
5
13.2
V
Supply Current
Outputs at Logic 1 V
CC
= 5 V
V
CC
= 12 V
-
4.6
6.5
mA
-
5.0
7.0
mA
Video Input (Pin 2)
(a) Signal Level
V
CC
= 5 V
Charge
0.5
-
4
Vp-p
(b) Clamp Current
500
650
850
μ
A
μ
A
μ
A
μ
s
V
Discharge - normal
9
11
13
- Nosync flag raised
65
95
115
(c) Delay to raising of Nosync flag Video input held high
64
95
130
(d) Sync Tip Clamp Voltage
-
1.55
-
Sync Slice Level
Relative to sync tip clamp voltage
70
77
84
mV
R
SET
Pin Reference Voltage (Pin 6)
See Note 1
1.14
1.24
1.34
V
Composite Sync Out (Pin 1)
See Note 2
40
60
80
ns
Delay from Video
C
L
= 15p
C
L
= 15p
Back Porch Pulse Out (Pin 5)
(a) Delay from Rising
Edge of Sync
400
500
650
ns
(b) Pulse Width
2.0
2.5
3.2
μ
s
(c) Occurence Rate
H
H
H
Vertical Sync Out (Pin 3)
(a) Pulse Width
Serrations during vertical interval
197.7
197.7
197.7
μ
s
μ
s
(b) Default Starting Time
No serrations during the vertical interval
48
65
82
Horizontal Sync Out (Pin 7)
C
L
= 15p
(a) Delay from Video
90
190
290
ns
(b) Pulse Width
5.0
7.0
9.0
μ
s
kHz
Horizontal Scan Rate
Modified R
SET
15
-
130
Logic Outputs
(a) V
OH
I
OH
= 40
μ
A V
CC
= 5 V
V
CC
= 12 V
I
OH
= 1.6 mA V
CC
= 5 V
Note 3
V
CC
= 12 V
I
OL
= -1.6 mA
4.2
4.6
-
V
11.2
11.6
-
V
2.4
3.4
-
V
9.4
10.4
-
V
(b) V
OL
-
0.3
0.6
V
GS4981 ELECTRICAL CHARACTERISTICS
(V
CC
= 5 V, R
SET
= 680 k
, T
A
= 25
°
C, unless otherwise specified)
Note 1: When placing the R
SET
resistor and the 0.1
μ
F 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.
Note 3: Applies only to composite sync, vertical sync, and back porch outputs. Horizontal sync has a passive 10 k
pull-up to V
CC
.
PARAMETER
CONDITIONS MIN TYP MAX UNITS
ORDERING INFORMATION
Part Number Package Type Temperature Range
GS4981 - CDA
8 PDIP
0
°
to 70
°
C
GS4981 - CKA
8 SOIC
0
°
to 70
°
C
GS4981 - CTA
8 TAPE
0
°
to 70
°
C
GS4981 - IDA
8 PDIP
-25
°
to 85
°
C
GS4981 - IKA
8 SOIC
-25
°
to 85
°
C
GS4981 - ITA
8 TAPE
-25
°
to 85
°
C
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