GS1881 Datasheet, PDF (2/14 Pages) Gennum Corporation – Monolithic Video Sync Separators

GS1881 ELECTRICAL CHARACTERISTICS ^(V_CC^{= 5 V, R}_SET ^{= 680 kΩ, T}_A ^{= 25° C, unless otherwise specified)}
PARAMETER
CONDITIONS
Supply Voltage
Supply Current
Video Input (Pin 2)
Outputs at Logic 1
V_CC = 5 V
V_CC = 12 V
(a) Signal Level
(b) Clamp Current
V_CC = 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
R_SET 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
Vertical Sync Out (Pin 3)
(a) Pulse Width
(b) Default Starting Time
Horizontal Scan Rate
Logic Outputs
(a) V_OH
(b) V_OL
See Note 2
C_L = 15p
C_L = 15p
Serrations during vertical interval
No serrations during the vertical interval
Modified R_SET
I_OH = 40 µA
I_OH = 1.6 mA
I_OL = -1.6 mA
V_CC = 5 V
V_CC = 12 V
V_CC = 5 V
V_CC = 12 V
MIN
4.5
-
-
0.5
500
9
65
64
-
70
1.14
40
400
2.0
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
ns
2.5
3.2
µs
197.7 197.7
µs
65
82
µs
-
130
kHz
4.6
-
V
11.6
-
V
3.4
-
V
10.4
-
V
0.3
0.6
V
Note 1: When placing the R_SET 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
GS1881 - CDA
GS1881 - CKA
GS1881 - CTA
GS1881 - IDA
GS1881 - IKA
GS1881 - 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
520 - 23 - 03
2
CAUTION
ELECTROSTATIC
SENSITIVE DEVICES
DO NOT OPEN PACKAGES OR HANDLE
EXCEPT AT A STATIC-FREE WORKSTATION