STV6412A
4 INPUT/OUTPUT GROUPS
Figure 7. Bottom Clamped Video Inputs
(Pins 2, 4, 6, 12, 14, 18, 21, 62, 64)
VCC 5 V
VCC 5 V
2 V + VD
Figure 10. Average Clamped Video Inputs
(Pin8)
VCC 5 V
VCC 5 V
IB
25 kΩ
25 kΩ
3V
15 kΩ
tri
Protected Pad
tri
Protected Pad
Figure 8. R/C Clamped Video Inputs (Pins 10,
60)
Figure 11. Cgate Logical Output (Pin 52)
VDD 5 V
VCCB1 5 V
R/C inputs may be configured either as a
bottom clamped input or as an average
clamped input. In either case, the simplified
input schematic is very close to one of the
graphics shown above.
Figure 9. Fast Blanking Inputs (Pins 50, 51)
VCCB1 5 V
18 kΩ
50 ohms
Protected Pad
Figure 12. Fast Blanking Output (Pin 49)
VCCB1 5 V
VCCB1 5 V
tri
Protected Pad
Protected Pad
19/24