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ML6430 Genlocking Sync Generator with Digital Audio Clock for NTSC, PAL & VGA
型号:   ML6430
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描述:   Genlocking Sync Generator with Digital Audio Clock for NTSC, PAL & VGA
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品牌   MICRO-LINEAR [ MICRO LINEAR CORPORATION ]
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December 1998
PRELIMINARY
ML6430/ML6431*
Genlocking Sync Generator with
Digital Audio Clock for NTSC, PAL & VGA
GENERAL DESCRIPTION
The ML6430/ML6431 are multi-standard single-chip
BiCMOS video Genlock ICs for NTSC, PAL and VGA.
They are designed to provide a stable clock from an
analog video signal, and to provide timing pulses for
clamping, decoding, blanking and processing video
signals. The ML6430/ML6431 handle VCR glitches and
variations created by head switching, tape dropouts,
missing sync pulses, freeze frames, high speed playback
and camcorder gyro errors. The ML6430/ML6431 are
designed for high noise immunity, insensitivity to varying
signal amplitudes, overmodulated color carriers, and sync
glitches. Advanced analog and digital clock synthesis
techniques provide multi-standard and non-standard
operation from a single crystal or external asynchronous
clock source. Pin selectable preset modes allow operation
for most video standards in simple stand-alone mode
without the necessity of using the serial bus. For more
demanding applications, a two wire serial control bus is
available for full control of all of the ML6430/ML6431
features.
The ML6430/ML6431 are ideal for clock generation in
MPEG encoders, high performance display timing, and
video editing.
FEATURES
s
s
s
s
s
s
s
s
s
s
s
s
Line locked scalable horizontal pixel clock for an
arbitrary number of pixels per line
Standard frequencies of 12.27, 13.5, 14.75MHz, or 4Fsc
4´/2´ or 2´/1´ clock outputs (54 and 27MHz, or 27 and
13.5MHz) and VGA clocks
Audio clocks: 32, 44.1, or 48kHz, locked to video
On-chip sync separator, VCO and pulse generator
Low clock jitter: Short Term: <200ps rms locked
Line to line: <600ps rms (2.2ns peak-to-peak) locked
Fast recovery from VCR head switch, stable for fast
shuttle speeds and pause
Single crystal or external frequency source
PAL, NTSC or VGA operation
2 wire serial control bus, or selectable presets for stand
alone operation
RS170A compatible
* This Part Is End Of Life As Of August 1, 2000
BLOCK DIAGRAM
4
9
21
29
C
VIN/
H
SYNC
6
V
CC
S
V
CC
A
V
CC
B
MUX
V
CC
D
C
SYNC
26
SYNC SEPARATOR
7
CV
REF
NOSIGNAL
SIGNAL DETECT
V
SYNC
14
8
ANALOG PLL
XTAL
IN
CRYSTAL
OSC.
XTAL
OUT
12
DIGITAL PLL
DIGITAL PHASE DET.
AND FILTERING
REF
VCO
DIGITAL PHASE
MOD.
HORIZ. PIXEL
COUNTER
VERT. LINE
COUNTER
DYNA. STATE MACH.
CONTROLLER
LOCKED
H
RESET
F
RESET
S
CLAMP
B
CLAMP
/BURST
1X CLOCK/4X CLOCK
2X CLOCK
H
BLANK
V
BLANK
15
23
22
28
27
19
18
11
÷M
PHASE
DETECTOR
÷N
31
32
1
2
P0
P1
P2/S DATA
P3/S CLK
SLEEP/54MHz
3
25
24
17
16
SERIAL CONTROL
AND PRESETS
FREERUN
13
PULSE AND AUDIO
CLOCK GENERATOR
GND S
5
FIELD ID
AUDIOCLK/PHERROUT*
GND D
*PHERROUT IS
ONLY AVAILABLE IN ML6431
30
GND A
10
GND B
20
1
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