DATASHEET
DVD/MPEG CLOCK SOURCE MK2745-24
IDT™
DVD/MPEG CLOCK SOURCE 1
MK2745-24 REV E 122109
Description
The MK2745-24 is a low-cost, low-jitter, high-performance
clock synthesizer for DVD and other MPEG 2-based
applications. Using analog Phase-Locked Loop (PLL)
techniques, the device accepts a 27 MHz fundamental
mode crystal or clock input to produce multiple audio output
clocks, a processor clock, and two 27 MHz clocks. The
audio clocks are frequency-locked to the 27 MHz using our
patented zero ppm error techniques. This allows audio and
video to track exactly, thereby eliminating the need for large
buffer memory.
IDT manufactures a large variety of DVD, Set-top Box, and
multiimedia clock synthesizers for all applications. Consult
IDT to eliminate crystals and oscillators from your board.
Features
• Packaged in a 16-pin narrow (150 mil) SOIC
• Ideal for AuraVision’s notebook DVD solutions
• Patented zero ppm audio clock error for exact audio clock
sampling rates, plus 32x and 256x clocks of the sampling
frequencies
• Selectable audio sampling frequencies support 32, 44.1,
and 96 kHz in most DACs
• 27 MHz fundamental crystal or clock input
• Selectable processor frequencies
• Two clocks of 27 MHz
• Zero ppm in all clocks
• 25 mA output drive capability at TTL levels
• Advanced, low-power, sub-micron CMOS process
• Operating voltage of 3.3 V to 5 V
• See also the MK2712 for NTSC/PAL clocks
NOTE: EOL for non-green parts to occur on 5/13/10
per PDN U-09-01
Block Diagram
CLKA4
CLKB1
CLKA3
CLKB2
CLKB3
CLKA2
CLKA1
CLKB4
Control
Logic
S2, S1
2
PLL
FBIN
CLKIN
/2
VDD
2
GND
2
BANK
A
BANK
B
