M66238FP Datasheet, PDF (1/15 Pages) Mitsubishi Electric Semiconductor – STANDARD CLOCK GENERATOR WITH PLL FREQUENCY SYNTHESIZER

M66238FP
Standard Clock Generator with PLL Frequency Synthesizer
REJ03F0268-0200
Rev.2.00
Mar 18, 2008
Description
The M66238 is a LSI that incorporates a PLL synthesizer and a sync clock generator in it. The PLL synthesizer covers
the range of 25 MHz to 50 MHz at the minimum steps of 3 kHz.
The sync circuit outputs a clock and a one-shot pulse which are synchronized with an external trigger signal. Setting a
dividing ratio allows acquisition of sync clock outputs within the range of 0.78 MHz to 25 MHz.
Features
• Sync clock output frequency range: 1/1, 1/2, 1/4, 1/8, 1/16, 1/32 of 25 to 50 MHz
• Sync accuracy (jitter): ±3 ns
• Trigger input: Polarity selectable
• One-shot pulse output: Polarity and width selectable
• 5 V power supply
Application
Pixel clock generator
Block Diagram
Chip select input
CS 3
Serial data input SIN 4
Serial clock input SCLK 5
Clock input XIN 7
Clock output XOUT 6
Reset input RESET 2
Trigger input
TR 17
Serial
write
control
circuit
Command
register
12
Command control
circuit
15
Crystal
oscillator circuit
fin
12-bit
divider
15-bit counter
Phase
comparator
VCO
25 MHz
fvco
to
50 MHz
Charge
pump
21
20
24
26
29
UP DOWN CPOUT CPIN RV
Test pin
Filter connect pin
Filter connect pin
VCO load output
Sync/divider
circuit
Sync clock
generator
10 TCKI
11 TCKO
Test pin
12
CKO/
PLLO
13 CKOB
PLL output
Clock output
14 PULSE One-shot pulse output
REJ03F0268-0200 Rev.2.00 Mar 18, 2008
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