MK2716STR IDT, Integrated Device Technology Inc, MK2716STR Datasheet - Page 2

• Manufacturer Part Number: MK2716STR
• Description: IC CLK SYNTHESIZER HDTV 8-SOIC
• Manufacturer: IDT, Integrated Device Technology Inc
• Type: Clock Synthesizer - Videor

Specifications of MK2716STR

• Pll: No
• Input: Clock, Crystal
• Output: CMOS
• Number Of Circuits: 1
• Ratio - Input:output: 1:2
• Differential - Input:output: No/No
• Frequency - Max: 74.25MHz
• Divider/multiplier: No/No
• Voltage - Supply: 3 V ~ 5.5 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC
• Frequency-max: 74.25MHz
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Pin Assignment
Pin Descriptions
External Components
Decoupling Capacitor
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.
Series Termination Resistor
A 33 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
MK2716
HDTV CLOCK SYNTHESIZER
ICLK/X1
Number
GND
VDD
CLK
Pin
1
2
3
4
5
6
7
8
1
2
3
4
ICLK/X1
Name
GND
GND
VDD
27M
27M
SEL
Pin
X2
Output
Output
Power
Power
Power
Type
Input
Pin
XO
XI
8
7
6
5
Crystal connection. Connect to a 27 MHz fundamental crystal or clock.
74.17582418 MHZ or 74.25 MHz clock output (see table above).
27 MHz buffered clock or crystal oscillator output.
Crystal connection. Connect to a 27 MHz crystal, or leave unconnected
for clock input.
Connect to +3.3 V or +5 V.
Connect to ground.
Connect to ground.
Select pin determines value of CLK per table above.
X2
27M
SEL
GND
2
F
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.
The value (in pF) of these crystal caps should equal (C
pF)*2. In this equation, C
Example: For a crystal with an 18 pF load capacitance, each
crystal capacitor would be 4 pF [(18-16) x 2] = 4.
REQUENCY
Pin Description
SEL
0
1
S
ELECT
74.17582418
CLK (MHz)
74.25
L
= crystal load capacitance in pF.
T
ABLE
CLOCK SYNTHESIZER
MK2716
REV G 051310
L
-16