GS1881_09 Datasheet, PDF (4/29 Pages) Gennum Corporation – Monolithic Video Sync Separators

2. Electrical Characteristics
2.1 GS1881 Electrical Characteristics
Table 2-1 shows the electrical characteristics of the GS1881 where conditions are
V_CC = 5V, R_SET = 680kΩ, T_A =25°C, unless otherwise shown.
Table 2-1: GS1881 Electrical Characteristics
Parameter
Conditions
Supply Voltage
–
Supply Current
Outputs at
Logic 1
V_CC = 5V
V_CC = 12V
Video Input (Pin 2)
(a) Signal Level
V_CC = 5V
(b) Clamp Current
Charge
Discharge - normal
Discharge - 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
See Note 2.
C_L = 15p
Back Porch Pulse Out (Pin 5)
(a) Delay from Rising Edge of Sync
(b) Pulse Width
C_L = 15p
Vertical Sync Out (Pin 3)
(a) Pulse Width
Serrations during vertical interval
(b) Default Starting Time
No serrations during vertical interval
Horizontal Scan Rate
Modified R_SET
Logic Outputs
(a) V_OH
Ι _OH = 40μA
V_CC = 5V
V_CC = 12V
Ι _OH =
1.6mA
V_CC = 5V
V_CC = 12V
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
–
650
11
95
95
1.55
77
1.24
60
500
2.5
197.7
65
–
4.6
11.6
3.4
10.4
Max
13.2
30
6.5
4
850
13
115
130
–
84
1.34
80
650
3.2
197.7
82
130
–
–
–
–
Units
V
mA
mA
Vp-p
μA
μA
μA
μs
V
mV
V
ns
ns
μs
μs
μs
kHz
V
V
V
V
GS1881, GS4881, GS4981 Monolithic Video Sync
Separators
Data Sheet
6926 - 5
November 2009
4 of 29
Proprietary & Confidential