MK1705ATR IDT, Integrated Device Technology Inc, MK1705ATR Datasheet

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MK1705ATR

Manufacturer Part Number
MK1705ATR
Description
IC CLK GEN ATI LOW EMI 8-SOIC
Manufacturer
IDT, Integrated Device Technology Inc
Type
Clock Generatorr
Datasheet

Specifications of MK1705ATR

Pll
Yes
Input
Clock
Output
CMOS
Number Of Circuits
1
Ratio - Input:output
1:1
Differential - Input:output
No/No
Frequency - Max
167MHz
Divider/multiplier
No/Yes
Voltage - Supply
3 V ~ 5.5 V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
8-SOIC
Frequency-max
167MHz
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
ATI LOW EMI CLOCK GENERATOR
Description
The MK1705A generates a low EMI output clock from a
clock or crystal input. The part is designed to dither the LCD
interface clock or other clocks for ATI’s flat panel graphics
controllers. The MK1705A uses IDT’s proprietary mixture of
analog and digital Phase Locked Loop (PLL) technology to
synthesize the frequency. It also uses IDT’s patented
technique to spread the frequency spectrum of the output,
thereby reducing the frequency amplitude peaks by several
dB.
The MK1705A is designed to have the output spread
centered around the input frequency. Refer to the MK1704A
for spreading down from the input frequency or the
MK1714-0x for a crystal input and the widest selection of
spread rates and multipliers.
IDT offers many other clocks for computers and computer
peripherals. Consult IDT when you need to remove crystals
and oscillators from your board.
Note: When changing input frequency, the LEE pin must be
set low for a minimum of 10 S to allow the PLL to lock to the
new frequency. Alternatively, the PD pin maybe be set low
while changing frequencies.
Block Diagram
IDT™ ATI LOW EMI CLOCK GENERATOR
Low EMI Enable
Power Down
Input Clock
S1:0
2
Buffer
Input
and Spread
PLL Clock
Synthesis
Spectrum
Circuitry
1
GND
VDD
Features
8-pin SOIC package
Provides a spread spectrum output clock
Supports ATI’s flat panel controllers
Accepts a clock input, provides same frequency dithered
output
Good for all VGA modes from 40 to 167 MHz
Peak reduction by 7 dB - 14 dB typical on 3rd - 19th odd
harmonics
Low EMI feature can be disabled
Operating voltage of 3.3 V or 5 V
Advanced, low power CMOS process
MK1705A
CLK
DATASHEET
MK1705A
REV E 101308

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MK1705ATR Summary of contents

Page 1

ATI LOW EMI CLOCK GENERATOR Description The MK1705A generates a low EMI output clock from a clock or crystal input. The part is designed to dither the LCD interface clock or other clocks for ATI’s flat panel graphics controllers. The ...

Page 2

MK1705A ATI LOW EMI CLOCK GENERATOR Pin Assignment ICLK 1 VDD 2 GND 3 CLK 4 8 pin (150 mil) SOIC Pin Descriptions Pin Pin Number Name 1 ICLK 2 VDD 3 GND 4 CLK 5 LEE ...

Page 3

MK1705A ATI LOW EMI CLOCK GENERATOR possible. No vias should be used between decoupling capacitor and VDD pin. The PCB trace to VDD pin should be kept as short as possible, as should the PCB trace to the ground via. ...

Page 4

MK1705A ATI LOW EMI CLOCK GENERATOR DC Electrical Characteristics Unless stated otherwise, VDD = 5 V, Ambient Temperature 0 to +70 C Parameter Operating Voltage Supply Current Input High Voltage Input Low Voltage Output High Voltage Output High Voltage Output ...

Page 5

... MK1705A MK1705ALF MK1705AL MK1705ATRLF MK1705AL Parts that are ordered with a “LF” suffix to the part number are the Pb-Free configuration and are RoHS compliant. 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 ...

Page 6

MK1705A ATI LOW EMI CLOCK GENERATOR 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 ...

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