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I C R O C LOC K
Description
The MK2716 is a low cost, low jitter, high performance clock synthesizer designed to produce the 74.176 MHz and 74.25 MHz clocks necessary for HDTV systems. Using analog PhaseLocked Loop (PLL) techniques, the device accepts a 27 MHz clock or fundamental crystal input. The zero ppm synthesis error exactly locks the display to the digital stream. MicroClock offers a wide variety of clock synthesizers for desktop and portable computers, and multimedia systems. Consult MicroClock to eliminate crystals and oscillators from your board.
MK2716 HDTV Clock Synthesizer
Features
* Packaged as 8 pin SOIC or die * Input frequency of 27 MHz * Zero ppm synthesis error in output clock * 3.3 V or 5.0 V10% operating supply * 25 mA drive capability at TTL levels * Ideal for HDTV applications and oscillator manufacturers * Advanced, low power CMOS process * Custom masks easily and quickly made
Block Diagram
VDD GND 2
SEL 27 MHz crystal or X1 clock Clock Buffer
X2
Clock Synthesis and Control Circuitry
Output Buffer
CLK 74.17582418 MHz or 74.2500 MHz
Output Buffer
27.0000 MHz
1 Revision 062599 Printed 11/16/00 MicroClock Division of ICS * 525 Race Street * San Jose * CA * 95126*(408)295-9800tel*(408)295-9818fax
MDS 2716 B
I C R O C LOC K
MK2716 HDTV Clock Synthesizer
Pin Assignment
ICLK/X1 VDD GND CLK 1 2 3 4 8 7 6 5 X2 27M SEL GND Frequency Select Table (MHz) SEL CLK 0 74.17582418 1 74.25
8 pin SOIC
Pin Descriptions
Number 1 2 3 4 5 6 7 8 Name ICLK/X1 VDD GND CLK GND SEL 27M X2 Type XI P P O P I O XO Description Input clock connection. Connect to a 27 MHz clock input or 27 MHz fundamental crystal. Connect to +3.3V or +5V. Connect to ground. 74.17582418 MHz or 74.25 MHz clock output (see table above). Connect to ground. Select pin determines value of CLK per table above. 27 MHz buffered clock or crystal oscillator output. Connect to 27 MHz crystal, or leave unconnected for clock input.
Type: I = Input; O = output; P = power supply connection; XI, XO = crystal connections
Decoupling and External Components
The MK2716 requires a 0.1F decoupling capacitor to be connected between VDD and GND on pins 2 and 3. It must be connected close to the MK2716. Pin 5 can be connected to pin 3. A 33 terminating resistor should be placed close to pin 4, and pin 7. If using a crystal input, it should be a 27.00 MHz, parallel resonant, fundamental mode, with load (correlation) capacitance of 18 pF. If the crystal has a load capacitance of 20 pF, connect 4 pF capacitors from X1 and X2 to ground.
2 Revision 062599 Printed 11/16/00 MicroClock Division of ICS * 525 Race Street * San Jose * CA * 95126*(408)295-9800tel*(408)295-9818fax
MDS 2716 B
I C R O C LOC K
Electrical Specifications
Parameter Supply voltage, VDD Inputs and Clock Outputs Ambient Operating Temperature Soldering Temperature Storage temperature Operating Voltage, VDD Input High Voltage, VIH Input Low Voltage, VIL Output High Voltage, VOH Output Low Voltage, VOL Operating Supply Current, IDD, 5.0V Short Circuit Current Input Capacitance Input Frequency Frequency Error, output clock Output Clock Rise Time Output Clock Fall Time Output Clock Duty Cycle Maximum Absolute Jitter, short term Conditions Referenced to GND Referenced to GND Max of 10 seconds
MK2716 HDTV Clock Synthesizer
Minimum
Typical
Maximum 7 VDD+0.5 70 260 150
Units V V C C C V V V V V mA mA pF MHz ppm ns ns % ps
ABSOLUTE MAXIMUM RATINGS (Note 1)
-0.5 0 -65 3.0 2 IOH=-4mA IOL=25mA No Load Each output VDD-0.4 0.4 30 50 7 27.000 0.8 to 2.0V 2.0 to 0.8V At 1.4V 0 1.5 1.5 60 5
DC CHARACTERISTICS (VDD = 5V unless noted)
5.5 0.8
AC CHARACTERISTICS (VDD = 5V unless noted)
40
50 200
Notes:
1. Stresses beyond those listed under Absolute Maximum Ratings could cause permanent damage to the device. Prolonged exposure to levels above the operating limits but below the Absolute Maximums may affect device reliability. 2. Typical values are at 25C.
3 Revision 062599 Printed 11/16/00 MicroClock Division of ICS * 525 Race Street * San Jose * CA * 95126*(408)295-9800tel*(408)295-9818fax
MDS 2716 B
I C R O C LOC K
Package Outline and Package Dimensions 8 pin SOIC
MK2716 HDTV Clock Synthesizer
E Pin 1
H
D Q e b c
h x 45 A
Symbol A b D E H e h L Q
Inches Min Max 0.055 0.068 0.013 0.019 0.185 0.200 0.150 0.160 0.225 0.245 .050 BSC 0.015 0.016 0.035 0.004 0.01
Millimeters Min Max 1.397 1.7272 0.330 0.483 4.699 5.080 3.810 4.064 5.715 6.223 1.27 BSC 0.381 0.406 0.889 0.102 0.254
Ordering Information
Part/Order Number MK2716S MK2716STR Marking MK2716S MK2716S Package 8 pin narrow SOIC 8 pin SOIC on tape and reel Temperature 0-70C 0-70C Std Qty 2500 pieces
While the information presented herein has been checked for both accuracy and reliability, Integrated Circuit Systems, Incorporated (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.
4 Revision 062599 Printed 11/16/00 MicroClock Division of ICS * 525 Race Street * San Jose * CA * 95126*(408)295-9800tel*(408)295-9818fax
MDS 2716 B

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