DATASHEET
MK2716
HDTV CLOCK SYNTHESIZER
Description
Features
The MK2716 is a low-cost, low jitter, high-performance PLL
clock synthesizer designed to produce the 74.176 MHz and
74.25 MHz clocks necessary for HDTV systems. Using
IDT’s patented analog Phase-Locked Loop (PLL)
techniques, the device accepts a 27 MHz crystal or clock
input. The zero ppm synthesis error exactly locks the
display to the digital stream.
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IDT manufactures the largest variety multimedia clock
synthesizers for all applications. Consult IDT to eliminate
crystals and oscillators from your board.
For applications that require lower jitter, such as SDI and
pixel clocks, use the ICS664.
Packaged in 8-pin SOIC
Pb (lead) free package
Input frequency of 27 MHz
Zero ppm synthesis error in output clock
3.3 V or 5 V ±10% operating supply
Ideal for HDTV applications and oscillator manufacturers
25 mA output drive capability at TTL levels
Advanced, low power, sub-micron CMOS process
Operating voltage of 3.3 V or 5 V
Block Diagram
VDD
Clock
Synthesis
and Control
Circuitry
SEL
27 MHz
crystal or
clock input
X1
Clock
Buffer
CLK
74.17582418 MHz or
74.2500 MHz
27.0000 MHz
X2
2
GND
IDT™ HDTV CLOCK SYNTHESIZER
1
MK2716
REV G 051310
MK2716
HDTV CLOCK SYNTHESIZER
CLOCK SYNTHESIZER
Pin Assignment
FREQUENCY SELECT TABLE
ICLK/X1
1
8
X2
VDD
2
7
27M
GND
3
6
SEL
CLK
4
5
GND
SEL
CLK (MHz)
0
74.17582418
1
74.25
Pin Descriptions
Pin
Number
Pin
Name
Pin
Type
Pin Description
1
ICLK/X1
XI
2
VDD
Power
Connect to +3.3 V or +5 V.
3
GND
Power
Connect to ground.
4
27M
Output
74.17582418 MHZ or 74.25 MHz clock output (see table above).
5
GND
Power
Connect to ground.
6
SEL
Input
Select pin determines value of CLK per table above.
7
27M
Output
8
X2
XO
Crystal connection. Connect to a 27 MHz fundamental crystal or clock.
27 MHz buffered clock or crystal oscillator output.
Crystal connection. Connect to a 27 MHz crystal, or leave unconnected
for clock input.
External Components
Decoupling Capacitor
should be used. The device crystal connections should
include pads for small capacitors from X1 to ground and
from X2 to ground. These capacitors are used to adjust the
stray capacitance of the board to match the nominally
required crystal load capacitance. Because load
capacitance can only be increased in this trimming process,
it is important to keep stray capacitance to a minimum by
using very short PCB traces (and no vias) between the
crystal and device. Crystal capacitors, if needed, must be
connected from each of the pins X1 and X2 to ground.
As with any high performance mixed-signal IC, the MK2716
must be isolated from system power supply noise to perform
optimally.
A decoupling capacitor of 0.01µF must be connected
between VDD and GND on pins 2 and 3. It must be
connected close to the MK2716 to minimize lead
inductance. Pin 5 can be connected to pin 3. No external
power supply filtering is required for the MK2716.
The value (in pF) of these crystal caps should equal (CL -16
pF)*2. In this equation, CL= crystal load capacitance in pF.
Example: For a crystal with an 18 pF load capacitance, each
crystal capacitor would be 4 pF [(18-16) x 2] = 4.
Series Termination Resistor
A 33Ω terminating resistor can be used next to the clock
outputs for trace lengths over one inch.
Crystal Load Capacitors
The total on-chip capacitance is approximately 18 pF. A
parallel resonant, fundamental mode, AT cut 27 MHz crystal
IDT™ HDTV CLOCK SYNTHESIZER
2
MK2716
REV G 051310
MK2716
HDTV CLOCK SYNTHESIZER
CLOCK SYNTHESIZER
Absolute Maximum Ratings
Stresses above the ratings listed below can cause permanent damage to the MK2716. These ratings, which are
standard values for IDT 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.
Item
Rating
Supply Voltage, VDD
7V
All Inputs and Outputs
-0.5 V to VDD+0.5 V
Ambient Operating Temperature
0 to +70° C
Storage Temperature
-65 to +150° C
Soldering Temperature
260° C
Recommended Operation Conditions
Parameter
Min.
Max.
Units
0
+70
°C
+3.0
+5.5
V
Ambient Operating Temperature
Power Supply Voltage (measured in respect to GND)
Typ.
DC Electrical Characteristics
VDD=5 V unless otherwise noted, Ambient temperature 0 to +70° C
Parameter
Symbol
Conditions
Min.
Typ.
Max.
Units
5
5.5
V
Operating Voltage
VDD
3.0
Input High Voltage
VIH
2.0
Input Low Voltage
VIL
Output High Voltage
VOH
IOH = -4 mA
Output Low Voltage
VOL
IOL = 16 mA
Operating Supply Current
IDD
No load
30
mA
Each output
+50
mA
S0, S1 pins
7
pF
Short Circuit Current
Input Capacitance
IDT™ HDTV CLOCK SYNTHESIZER
CIN
V
0.8
3
VDD-0.4
V
V
0.4
MK2716
V
REV G 051310
MK2716
HDTV CLOCK SYNTHESIZER
CLOCK SYNTHESIZER
AC Electrical Characteristics
VDD = 5 V unless otherwise noted, Ambient Temperature 0 to +70° C
Parameter
Symbol
Input Frequency
Conditions
Min.
FIN
Typ.
Max. Units
27
Frequency Error, Output Clock
MHz
0
ppm
Output Clock Rise Time
tOR
0.8 to 2.0 V
1.5
ns
Output Clock Fall Time
tOF
2.0 to 8.0 V
1.5
ns
60
%
Output Clock Duty Cycle
at 1.4 V
Maximum Absolute Jitter, short term
tja
40
Deviation from mean
50
200
ps
Thermal Characteristics
Parameter
Thermal Resistance Junction to
Ambient
Thermal Resistance Junction to Case
Symbol
Conditions
Min.
Typ.
Max. Units
θJA
Still air
150
° C/W
θJA
1 m/s air flow
140
° C/W
θJA
3 m/s air flow
120
° C/W
40
° C/W
θJC
Marking Diagram (Pb free)
8
5
MK2716SL
######
YYWW
1
4
Notes:
1. ###### is the lot number.
2. YYWW is the last two digits of the year and week that the part was assembled.
3. “LF” or “L” denotes Pb (lead) free package.
4. Bottom marking: (origin)
Origin = country of origin if not USA
IDT™ HDTV CLOCK SYNTHESIZER
4
MK2716
REV G 051310
MK2716
HDTV CLOCK SYNTHESIZER
CLOCK SYNTHESIZER
Package Outline and Package Dimensions (8-pin SOIC, 150 Mil. Narrow Body)
Package dimensions are kept current with JEDEC Publication No. 95
Millimeters
Inches
8
Symbol
E
A
A1
B
C
D
E
e
H
h
L
α
H
INDEX
AREA
1 2
D
A
Min
Max
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°
Min
Max
.0532
.0688
.0040
.0098
.013
.020
.0075
.0098
.1890
.1968
.1497
.1574
0.050 BASIC
.2284
.2440
.010
.020
.016
.050
0°
8°
h x 45
A1
C
-Ce
B
SEATING
PLANE
L
.10 (.004)
C
Ordering Information
Part / Order Number
Marking
Shipping Packaging
Package
Temperature
MK2716SLF
MK2716SLFTR
MK2716SL
MK2716SL
Tubes
Tape and Reel
8-pin SOIC
8-pin SOIC
0 to +70° C
0 to +70° C
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. 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 IDT. IDT reserves the right to change any circuitry or specifications without notice. IDT
does not authorize or warrant any IDT product for use in life support devices or critical medical instruments.
IDT™ HDTV CLOCK SYNTHESIZER
5
MK2716
REV G 051310
MK2716
HDTV CLOCK SYNTHESIZER
CLOCK SYNTHESIZER
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For Tech Support
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408-284-8200
Fax: 408-284-2775
www.idt.com/go/clockhelp
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Integrated Device Technology, Inc.
www.idt.com
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