ML6430 Datasheet, PDF (1/33 Pages) Micro Linear Corporation – Genlocking Sync Generator with Digital Audio Clock for NTSC, PAL & VGA

December 1998
PRELIMINARY
ML6430/ML6431*
Genlocking Sync Generator with
Digital Audio Clock for NTSC, PAL & VGA
GENERAL DESCRIPTION
FEATURES
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.
s Line locked scalable horizontal pixel clock for an
arbitrary number of pixels per line
s Standard frequencies of 12.27, 13.5, 14.75MHz, or 4Fsc
s 4´/2´ or 2´/1´ clock outputs (54 and 27MHz, or 27 and
13.5MHz) and VGA clocks
s Audio clocks: 32, 44.1, or 48kHz, locked to video
s On-chip sync separator, VCO and pulse generator
s Low clock jitter: Short Term: <200ps rms locked
s Line to line: <600ps rms (2.2ns peak-to-peak) locked
s Fast recovery from VCR head switch, stable for fast
shuttle speeds and pause
s Single crystal or external frequency source
s PAL, NTSC or VGA operation
s 2 wire serial control bus, or selectable presets for stand
alone operation
s RS170A compatible
* This Part Is End Of Life As Of August 1, 2000
BLOCK DIAGRAM
CVIN/
HSYNC
6
CVREF
7
SYNC SEPARATOR
VSYNC
8
XTALIN
11
XTALOUT
12
ANALOG PLL
CRYSTAL
OSC.
÷M
PHASE
DETECTOR
÷N
P0
31 _P1
32
P2/S DATA
1
P3/S CLK
2
SERIAL CONTROL
AND PRESETS
SLEEP/54MHz
3
FREERUN
13
4
VCC S
9
VCC A
21
VCC B
29
VCC D
MUX
CSYNC
26
REF
VCO
SIGNAL DETECT
NOSIGNAL
14
DIGITAL PLL
DIGITAL PHASE DET.
AND FILTERING
DYNA. STATE MACH.
CONTROLLER
DIGITAL PHASE
MOD.
HORIZ. PIXEL
COUNTER
VERT. LINE
COUNTER
PULSE AND AUDIO
CLOCK GENERATOR
GND S GND A GND B GND D
5
10
20
30
LOCKED
15
HRESET
23
FRESET
22
SCLAMP
28
BCLAMP/BURST
27
1X CLOCK/4X CLOCK
19
2X CLOCK
18
HBLANK
VBLANK ²⁵
FIELD ID ²⁴
AUDIOCLK/PHERROUT* ¹⁷
16
*PHERROUT IS
ONLY AVAILABLE IN ML6431
1