MK2745-21S IDT, Integrated Device Technology Inc, MK2745-21S Datasheet

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MK2745-21S

Manufacturer Part Number
MK2745-21S
Description
IC CLK SOURCE DVD/MPEG 16-SOIC
Manufacturer
IDT, Integrated Device Technology Inc
Type
Clock/Frequency Synthesizerr
Datasheet

Specifications of MK2745-21S

Pll
Yes
Input
Clock, Crystal
Output
CMOS
Number Of Circuits
1
Ratio - Input:output
2:5
Differential - Input:output
No/No
Frequency - Max
80MHz
Divider/multiplier
Yes/No
Voltage - Supply
3 V ~ 5.5 V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
16-SOIC
Frequency-max
80MHz
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
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MK2745-21S
Manufacturer:
MICROCL
Quantity:
20 000
Part Number:
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Manufacturer:
NJR
Quantity:
1 194
Part Number:
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15
DVD/MPEG CLOCK SOURCE
Description
The MK2745-21 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, the processor clock divided by
two, 27 MHz, 24.576 MHz, and a selectable audio clock.
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
multimedia clock synthesizers for all applications. Consult
IDT to eliminate crystals and oscillators from your board.
Block Diagram
IDT™ DVD/MPEG CLOCK SOURCE
27 MHz crystal
or clock
X2
X1
AS2:0
PS1:0
Clock Buffer/
2
3
Ocsillator
Crystal
Synthesis and
Circuitry
Control
Clock
VDD
GND
1
2
2
Features
Packaged in a 16-pin narrow (150 mil) SOIC
Ideal for LuxSonor’s DVD solutions
3.3 V upgrade to the MK2744
Patented zero ppm audio clock error for 256x and 384x
sampling rates
Selectable audio sampling frequencies support 32, 44.1,
and 48 kHz in most DACs
27 MHz fundamental crystal or clock input
Eight selectable processor frequencies
Fixed clocks of 27 and 24.576 MHz
Zero ppm in all clocks
25 mA output drive capability at TTL levels
Advanced, low-power, sub-micron CMOS process
Operating voltage of 3.0 V to 5.5 V
See also the MK2712 for NTSC/PAL clocks
/2
Audio Clock
24.576 MHz
Processor Clock
PCLK/2
27 MHz
MK2745-21
DATASHEET
MK2745-21
REV F 051310

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MK2745-21S Summary of contents

Page 1

... DVD/MPEG CLOCK SOURCE Description The MK2745- 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, the processor clock divided by two, 27 MHz, 24 ...

Page 2

... Audio clock Select 1. Selects audio clock on pin 6 per table above. Connect to +3 Must be same as other VDD. 2 VCXO AND SYNTHESIZER ACLK 0 0 12.288 0 1 11.2896 1 0 8.192 1 1 24.576 0 0 8.192 0 1 16.9344 1 0 18.432 1 1 11.2896 PCLK PCLK/2 0 66.66 33. MK2745-21 REV F 051310 ...

Page 3

... The MK2745-21 requires a minimum number of external components for proper operation. Decoupling capacitors of 0.1µF should be connected between VDD and GND, as close to the MK2745-21 as possible. A series termination resistor of 33 may be used for each clock output clock input is not used, the 27 MHz crystal must be connected as close to the chip as possible ...

Page 4

... VCXO AND SYNTHESIZER Typ. Max. Units +70 C +5.5 V Typ. Max. Units 3.0 5.5 (VDD/2)-1 2 0.8 2.4 0 ±100 Min. Typ. Max. Units 27 MHz 1 ppm 200 ps Min. Typ. Max. Units 120 C/W 115 C/W 105 C/W 58 C/W MK2745- REV F 051310 ...

Page 5

... Part / Order Number Marking MK2745-21SLF 2745-21SLF MK2745-21SLFTR 2745-21SLF “LF” denotes Pb (lead) free package While the information presented herein has been checked for both accuracy and reliability, Integrated Device Technology (IDT) assumes no responsibility for either its use or for the infringement of any patents or other rights of third parties, which would result from its use. No other circuits, patents, or licenses are implied ...

Page 6

... MK2745-21 DVD/MPEG CLOCK SOURCE Innovate with IDT and accelerate your future networks. Contact: www.IDT.com For Sales 800-345-7015 408-284-8200 Fax: 408-284-2775 Corporate Headquarters Integrated Device Technology, Inc. www.idt.com © 2006 Integrated Device Technology, Inc. All rights reserved. Product specifications subject to change without notice. IDT and the IDT logo are trademarks of Integrated Device Technology, Inc ...

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