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PDF MN6761S Data sheet ( Hoja de datos )
| Número de pieza | MN6761S | |
| Descripción | External Synchronization Control LSI for Color Video Cameras | |
| Fabricantes | Panasonic | |
| Logotipo |  |
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For Video Equipment
MN6761S
External Synchronization Control LSI for Color Video Cameras
Overview
The MN6761S is an external synchronization control
LSI for color video cameras.
When used in combination with a synchronizing signal
generator (MN67601NS or MN67602PS), it provides
external synchronization control for NTSC and PAL video
systems.
Features
Synchronization of both the video camera and the
VCR
External synchronization inputs:
Composite synchronizing signal and burst
subcarrier
External synchronization techniques
• Horizontal synchronization: phase-locked loop
• Vertical synchronization: reset technique
• Subcarrier synchronization: phase-locked loop
Support for both NTSC and PAL systems
Built-in feature for automatically switching between
external and internal synchronization
Built-in horizontal phase adjustment circuit
Applications
Color video cameras
Pin Assignment
SCPSW1
SCPSW2
WHD
N/P
BGP
GLBSC
VSS2
VDD2
GLSYNC
TEST2
fHP
HPCO
XfHOSCI
XfHOSCO
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28 4fSC
27 4fSCOSCO
26 4fSCOSCI
25 SOPCO
24 SC1
23 VDD1
22 VSS1
21 TEST1
20 HBLK
19 EXT/INT
18 LSWCONT
17 LSW
16 VR
15 XfH
(TOP VIEW)
SOP028-P-0375
1 page  
For Video Equipment
Timing Chart
MN6761S
1. Horizontal synchronization block
This block compares the phases of the HSYNC signal derived by separating off the horizontal component of
the GLSYNC input and the WHD signal from the synchronizing signal generator after it has passed through
the monostable multivibrator. It is thus possible to adjust the horizontal phase by adjusting the CR integral
circuit's time constant.
GLSYNC
HSYNC
WHD
DELAY
WHD
Timing chart for horizontal pulse phase comparison
2. Vertical synchronization block
This block detects the V-SERATION interval in the GLSYNC input and generates a vertical reset (VR) pulse
with 0.5 H of the start of that interval. It then issues no pulses for 256 H (NTSC) or 304 H (PAL) after this
VR pulse.
GLSYNC
VR
14.0µs (NTSC)
11.2µs (PAL)
2.2µs (NTSC)
1.8µs (PAL)
Vertical reset pulse timing chart
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet MN6761S.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| MN6761S | External Synchronization Control LSI for Color Video Cameras | Panasonic |
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