Datasheet MK2716STR, MK2716S Datasheet (ICST)

MK2716

ICRO

C

LOCK

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.

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 V±10% 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

SEL

27 MHz
crystal or
clock

X1

X2

VDD GND

2

Clock
Buffer

Clock Synthesis

and Control

Circuitry

Output

Buffer

Output

Buffer

CLK

74.17582418 MHz or

74.2500 MHz

27.0000 MHz

MDS 2716 B 1 Revision 062599 Printed 11/16/00

MicroClock Division of ICS • 525 Race Street • San Jose • CA • 95126•[phone]tel•[phone]fax

MK2716

Pin Assignment

ICLK/X1

VDD

GND

CLK

1 8

2
3
4

8 pin SOIC

Pin Descriptions

ICRO

C

7
6

5

LOCK

X2

27M
SEL
GND

HDTV Clock Synthesizer

Frequency Select Table (MHz)

SEL CLK

0 74.17582418
1 74.25

Number Name Type Description

1 ICLK/X1 XI Input clock connection. Connect to a 27 MHz clock input or 27 MHz fundamental crystal.
2 VDD P Connect to +3.3V or +5V.
3 GND P Connect to ground.
4 CLK O 74.17582418 MHz or 74.25 MHz clock output (see table above).
5 GND P Connect to ground.
6 SEL I Select pin determines value of CLK per table above.
7 27M O 27 MHz buffered clock or crystal oscillator output.
8 X2 XO 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 0.1µF 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 Ω 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.

MDS 2716 B 2 Revision 062599 Printed 11/16/00

MicroClock Division of ICS • 525 Race Street • San Jose • CA • 95126•[phone]tel•[phone]fax

MK2716

ABSOLUTE MAXIMUM RATINGS (Note 1)

DC CHARACTERISTICS (VDD = 5V unless noted)

AC CHARACTERISTICS (VDD = 5V unless noted)

ICRO

C

LOCK

HDTV Clock Synthesizer

Electrical Specifications

Parameter Conditions Minimum Typical Maximum Units

Supply voltage, VDD Referenced to GND 7 V
Inputs and Clock Outputs Referenced to GND -0.5 VDD+0.5 V
Ambient Operating Temperature 0 70 °C
Soldering Temperature Max of 10 seconds 260 °C
Storage temperature -65 150 °C

Operating Voltage, VDD 3.0 5 5.5 V
Input High Voltage, VIH 2 V
Input Low Voltage, VIL 0.8 V
Output High Voltage, VOH IOH=-4mA VDD-0.4 V
Output Low Voltage, VOL IOL=25mA 0.4 V
Operating Supply Current, IDD, 5.0V No Load 30 mA
Short Circuit Current Each output ±50 mA
Input Capacitance 7 pF

Input Frequency 27.000 MHz
Frequency Error, output clock 0 ppm
Output Clock Rise Time 0.8 to 2.0V 1.5 ns
Output Clock Fall Time 2.0 to 0.8V 1.5 ns
Output Clock Duty Cycle At 1.4V 40 50 60 %
Maximum Absolute Jitter, short term 200 ps

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 25°C.

MDS 2716 B 3 Revision 062599 Printed 11/16/00

MicroClock Division of ICS • 525 Race Street • San Jose • CA • 95126•[phone]tel•[phone]fax

MK2716

Inches

Millimeters

ICRO

C

LOCK

Package Outline and Package Dimensions

8 pin SOIC

E H

Pin 1

h x 45°

c

Q

D

e

b

HDTV Clock Synthesizer

Symbol Min Max Min Max

A 0.055 0.068 1.397 1.7272
b 0.013 0.019 0.330 0.483

D 0.185 0.200 4.699 5.080

E 0.150 0.160 3.810 4.064

H 0.225 0.245 5.715 6.223

e
h 0.015 0.381
L 0.016 0.035 0.406 0.889

Q 0.004 0.01 0.102 0.254

A

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.

MDS 2716 B 4 Revision 062599 Printed 11/16/00

MicroClock Division of ICS • 525 Race Street • San Jose • CA • 95126•[phone]tel•[phone]fax

Ordering Information

Part/Order Number Marking Package Temperature Std Qty

MK2716S MK2716S 8 pin narrow SOIC 0-70°C -

MK2716STR MK2716S 8 pin SOIC on tape and reel 0-70°C 2500 pieces