View MK1709_230873.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

MK1709
Low EMI Clock Generator
Description
The MK1709 generates a low EMI output clock from a clock input. The part is designed to dither the LCD interface clock for flat panel graphics controllers. The device uses ICS' proprietary mix of analog and digital Phase Locked Loop (PLL) technology to spread the frequency spectrum of the output, thereby reducing the frequency amplitude peaks by several dB. The MK1709 offers centered spread from a high speed clock input. Refer to the MK1714-01/02 for a crystal input and the widest selection of input frequencies and multipliers. ICS offers many other clocks for computers and computer peripherals. Consult us when you need to remove crystals and oscillators from your board.
Features
* Packaged in 8-pin SOIC (MK1709S) and in 8-pin
TSSOP (MK1709AG)
* * * * *
8-pin TSSOP available in lead (Pb) free package Provides a spread spectrum output clock Supports flat panel controllers Guaranteed to +85C operation Accepts a clock input, provides same frequency dithered output
* Good for all VGA modes from 80 to 167 MHz * Peak reduction by 7dB - 14dB typical on 3rd - 19th
odd harmonics
* * * *
Low EMI feature can be disabled Includes power-down Operating voltage of 3.3 V Advanced, low-power CMOS process
Block Diagram
VDD
S0 S1 S2 Low EMI Enable PLL Clock Synthesis and Spread Spectrum Circuitry Input Buffer
Clock Out
ICLK
GND
MDS 1709 E Integrated Circuit Systems, Inc.
1
525 Race Street, San Jose, CA 95126
Revision 051305 tel (408) 297-1201
www.icst.com
MK1709 Low EMI Clock Generator
Pin Assignment
ICLK VDD GND CLK 1 2 3 4 8 7 6 5 S2 S1 S0 LEE
Spread Percentage and Direction Select Table
S2 Pin 8 (1709S) Pin 6 (1709AG) 0 0 0 S1 Pin 7 (1709S) Pin 5 (1709AG) 0 0 0 S0 Pin 6 (1709S) Pin 4 (1709AG) 0 M 1 Frequency Spread Range Percentage (%)
8-pin SOIC (MK1709S)
40-50 40-50 40-50 (MK1709S) 25-50 (MK1709AG) 40-50 (MK1709S) 25-50 (MK1709AG) 40-50 50 -100 50 -100 50 -100 Power Down 50 -100 50 -100 100-165 100-165 100-165 100-165 100-165 100-165 Power Down
0.9 0.7 0.8
GND CLK LEE S0
1 2 3 4
8 7 6 5
VDD ICLK S2 S1
0
M
0
0.6
8-pin TSSOP (MK1709AG)
0 0 0 0 0 1 1 1 1 1 1 1 1 1
M M 1 1 1 0 0 0 M M M 1 1 1
M 1 0 M 1 0 M 1 0 M 1 0 M 1
1.1 0.6 0.7 0.8 -- 0.9 1.1 0.7 0.6 1.1 1.35 0.8 0.9 --
0 = connect to GND M = unconnected (floating) has internal Pull up resistor to VDD and is considered as a 1 state 1 = connect directly to VDD
MDS 1709 E Integrated Circuit Systems, Inc.
2
525 Race Street, San Jose, CA 95126
Revision 051305 tel (408) 297-1201
www.icst.com
MK1709 Low EMI Clock Generator
Pin Descriptions (MK1709S)
Pin Number Pin Name Pin Type Pin Description
1 2 3 4 5 6 7 8
ICLK VDD GND CLK LEE S0 S1 S2
Input Power Power Output Input Input Input Input
Connect to graphics input clock. Connect to +3.3 V. Connect to ground. Spread spectrum clock output per table above. Low EMI enable. Turns on spread spectrum when high. Internal pull-up resistor. Function select 0 input. Selects spread amount and direction per table above. Internal mid-level. Function select 1 input. Selects spread amount and direction per table above. Internal mid-level. Function select 2 input. Selects spread amount and direction per table above.
Pin Descriptions (MK1709AG)
Pin Number Pin Name Pin Type Pin Description
1 2 3 4 5 6 7 8
GND CLK LEE S0 S1 S2 ICLK VDD
Power Output Input Input Input Input Input Power
Connect to ground. Spread spectrum clock output per table above. Low EMI enable. Turns on spread spectrum when high. Internal pull-up resistor. Function select 0 input. Selects spread amount and direction per table above. Internal mid-level. Function select 1 input. Selects spread amount and direction per table above. Internal mid-level. Function select 2 input. Selects spread amount and direction per table above. Connect to graphics input clock. Connect to +3.3 V.
MDS 1709 E Integrated Circuit Systems, Inc.
3
525 Race Street, San Jose, CA 95126
Revision 051305 tel (408) 297-1201
www.icst.com
MK1709 Low EMI Clock Generator
External Components
The MK1709 requires a minimum number of external components for proper operation.
PCB layout Recommendations
For optimum device performance and lowest output phase noise, the following guidelines should be observed. 1) The 0.01F decoupling capacitor should be mounted on the component side of the board as close to the VDD pin as possible. No vias should be used between the 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. 2) Place a 33 series termination resistor (if needed) close to the clock output to minimize EMI. 3) An optimum layout is one with all components on the same side of the board, minimizing vias through other signal layers. Other signal traces should be routed away from the MK1709. This includes signal traces just underneath the device, or on layers adjacent to the ground plane layer used by the device.
Decoupling Capacitor
A decoupling capacitor of 0.01F must be connected between VDD and GND on pins 2 and 3 for the MK1709S, or pins 1 and 8 for the MK1709AG. Place the capacitor as close to these pins as possible. For optimum device performance, the decoupling capacitor should be mounted on the component side of the PCB. Avoid the use of vias in the decoupling circuit.
Series Termination Resistor
When the PCB trace between the clock output and the load is over 1 inch, series termination should be used. To series terminate a 50 trace (a commonly used trace impedance), place a 33 resistor in series with the clock line, as close to the clock output pin as possible. The nominal impedance of the clock output is 20.
Select Pin Operation
The S1, S0 select pins are 2-level, meaning they have three separate states to make the selections shown in the table on page 2.
MDS 1709 E Integrated Circuit Systems, Inc.
4
525 Race Street, San Jose, CA 95126
Revision 051305 tel (408) 297-1201
www.icst.com
MK1709 Low EMI Clock Generator
Absolute Maximum Ratings
Stresses above the ratings listed below can cause permanent damage to the MK1709. These ratings, which are standard values for ICS commercially rated parts, are stress ratings only. Functional operation of the device at these or any other conditions above those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods can affect product reliability. Electrical parameters are guaranteed only over the recommended operating temperature range. Typical values are at 25C.
Item
Supply Voltage, VDD (referenced to GND) All Inputs and Outputs (referenced to GND) Ambient Operating Temperature Storage Temperature Soldering Temperature (maximum of 10 seconds) 5V
Rating
-0.5 V to VDD+0.5 V 0 to +85C -65 to +150C 260C
Recommended Operation Conditions
Parameter
Ambient Operating Temperature Power Supply Voltage (measured in respect to GND)
Min.
0 +3.135
Typ.
Max.
+85 +3.6
Units
C V
DC Electrical Characteristics
Unless stated otherwise, VDD = 3.3 V, Ambient Temperature 0 to +85C
Parameter
Operating Voltage Supply Current (MK1709S) Supply Current (MK1709AG) Input High Voltage (ICLK) Input High Voltage (S1, S0) Input High Voltage (other inputs) Input Low Voltage (ICLK) Input Low Voltage Output High Voltage (CMOS) Output High Voltage Output Low Voltage Input Capacitance
Symbol
VDD IDD IDD IDD VIH VIH VIH VIL VIL VOH VOH VOL CIN
Conditions
No load, at 3.3 V No load, 50M No load, 150M
Min.
3.135
Typ.
20 13 23
Max.
3.465
Units
V mA A V V V
(VDD/2)+1 VDD-0.5 2
VDD/2
VDD/2 IOH = -4mA IOH = -12 mA IOL = 12 mA S0, S1, S2, LEE pins 7 VDD-0.4 2.4
(VDD/2)-1 0.5
V V V V
0.4
V pF
MDS 1709 E Integrated Circuit Systems, Inc.
5
525 Race Street, San Jose, CA 95126
Revision 051305 tel (408) 297-1201
www.icst.com
MK1709 Low EMI Clock Generator
AC Electrical Characteristics (MK1709S)
Unless stated otherwise, VDD = 3.3 V, Ambient Temperature 0 to +85 C
Parameter
Input/Output Clock Frequency Input Clock Duty Cycle Output Clock Duty Cycle Output Clock Rise Time Output Clock Fall Time EMI Peak Frequency Reduction
Symbol
Conditions
Time above VDD/2 Time above 1.5 V
Min.
80 20 40
Typ.
Max. Units
167 80 MHz % % ns ns dB
50 1.5 1.5 7 to 14
60
tOR tOF
0.8 to 2.0V 2.0 to 0.8V 3rd - 19th odd harmonics
AC Electrical Characteristics (MK1709AG)
Unless stated otherwise, VDD = 3.3 V, Ambient Temperature 0 to +85 C
Parameter
Input/Output Clock Frequency Input Clock Duty Cycle Output Clock Duty Cycle
Symbol
Conditions
Time above VDD/2 Time above 1.5 V, 40 MHz - 100 MHz Time above 1.5 V, 100 MHz - 150 MHz Time above 1.5 V, >150 MHz
Min.
25 20 40
Typ.
Max. Units
165 80 MHz % % % % 1.5 1.5 ns ns dB
50 45 35
55
Output Clock Rise Time Output Clock Fall Time EMI Peak Frequency Reduction
tOR tOF
0.8 to 2.0V 2.0 to 0.8V 3rd - 19th odd harmonics 7 to 14
Spread Spectrum Modulation Rate
For 40 to 50 MHz selections, modulation rate = input frequency/1028; for 50 to 100 MHz selections, modulation rate = input frequency/2056; for 100 to 165 MHz selections, modulation rate = input frequency/4112.
MDS 1709 E Integrated Circuit Systems, Inc.
6
525 Race Street, San Jose, CA 95126
Revision 051305 tel (408) 297-1201
www.icst.com
MK1709 Low EMI Clock Generator
Marking Diagrams
8 5
Marking for lead (Pb) free device
MK1709S YYWW ######
1 4
1
4
MK1709AG YYWWLF ######
8
5
Package Outline and Package Dimensions (8-pin SOIC, 150 Mil. Body)
Package dimensions are kept current with JEDEC Publication No. 95
8
Millimeters Symbol Min Max
Inches Min Max
E INDEX AREA
H
12 D
A A1 B C D E e H h L
h x 45
1.35 1.75 0.10 0.25 0.33 0.51 0.19 0.25 4.80 5.00 3.80 4.00 1.27 BASIC 5.80 6.20 0.25 0.50 0.40 1.27 0 8
.0532 .0688 .0040 .0098 .013 .020 .0075 .0098 .1890 .1968 .1497 .1574 0.050 BASIC .2284 .2440 .010 .020 .016 .050 0 8
A A1
C
-Ce
B SEATING PLANE L
.10 (.004)
C
MDS 1709 E Integrated Circuit Systems, Inc.
7
525 Race Street, San Jose, CA 95126
Revision 051305 tel (408) 297-1201
www.icst.com
MK1709
Low EMI Clock Generator
Package Outline and Package Dimensions (8-pin TSSOP, 173 Mil. Body)
Package dimensions are kept current with JEDEC Publication No. 95
Millimeters Symbol Min Max Inches Min Max
8
E1 IN D EX AR EA
E
1
2
D
A A1 A2 b C D E E1 e L aaa
-1.20 0.05 0.15 0.80 1.05 0.19 0.30 0.09 0.20 3.90 3.10 6.40 BASIC 4.30 4.50 0.65 Basic 0.45 0.75 0 8 0.10
-0.047 0.002 0.006 0.032 0.041 0.007 0.012 0.0035 0.008 0.114 0.122 0.252 BASIC 0.169 0.177 0.0256 Basic 0.018 0.030 0 8 0.004
A 2 A 1
A
c
-Ce
b S E A T IN G P LA N E L
aaa
C
MDS 1709 E Integrated Circuit Systems, Inc.
8
525 Race Street, San Jose, CA 95126
Revision 051305 tel (408) 297-1201
www.icst.com
MK1709
Low EMI Clock Generator
Ordering Information
Part / Order Number
MK1709S MK1709STR MK1709AG MK1709AGTR MK1709AGLF MK1709AGLFTR
Marking
Shipping packaging
Tubes Tape and Reel Tubes Tape and Reel Tubes Tape and Reel
Package
8-pin SOIC 8-pin SOIC 8-pin TSSOP 8-pin TSSOP 8-pin TSSOP 8-pin TSSOP
Temperature
0 to +85 C 0 to +85 C 0 to +85 C 0 to +85 C 0 to +85 C 0 to +85 C
(see page 7)
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 Circuit Systems (ICS) 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. This product is intended for use in normal commercial applications. Any other applications such as those requiring extended temperature range, high reliability, or other extraordinary environmental requirements are not recommended without additional processing by ICS. ICS reserves the right to change any circuitry or specifications without notice. ICS does not authorize or warrant any ICS product for use in life support devices or critical medical instruments.
MDS 1709 E Integrated Circuit Systems, Inc.
9
525 Race Street, San Jose, CA 95126
Revision 051305 tel (408) 297-1201
www.icst.com

▲Up To Search▲

Price & Availability of MK1709

	To Download MK1709 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .