mk2014a ETC-unknow, mk2014a Datasheet

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mk2014a

Manufacturer Part Number
mk2014a
Description
Fast Ethernet Clock Source
Manufacturer
ETC-unknow
Datasheet
Block Diagram
MDS 2014A B
MicroClock Division of ICS • 525 Race Street • San Jose • CA • 95126•(408)295-9800tel•(408)295-9818fax
The MK2014A is the ideal way to generate clocks
for Fast Ethernet cards or systems. It provides
20MHz and 25MHz clocks from an inexpensive
14.31818 MHz crystal or clock. In an 8 pin SOIC,
the MK2014A can save component count, board
space, and cost over surface mount crystals and
oscillators, and increase reliability by eliminating
mechanical devices from the board.
The MK2014A is a functionally identical update
of the MK2014 and should be used in all designs.
The only change is in crystal load capacitance as
stated on page 2.
MicroClock offers many other clocks for
computers and computer peripherals. Consult your
MicroClock representative when you need to
remove crystals and oscillators from your board.
Description
14.31818 MHz
crystal or clock
X2
X1
I C R O
VDD GND
Oscillator
Crystal
C
LOC K
2
Clock Synthesis
and Control
Circuitry
1
Features
• Packaged in 8 pin SOIC
• Input crystal or clock frequency of 14.318 MHz
• Lowest jitter in the industry reliably clocks
• Output clock frequencies of 20.00 MHz and
• Zero ppm synthesis error in the output clocks
• Full CMOS outputs with 25mA drive capability
• 3.3V or 5V±10% supply voltage
• Advanced, low power CMOS process
• Insensitive to input clock duty cycle
sensitive Ethernet devices.
at TTL levels
25.00 MHz
Fast Ethernet Clock Source
Output
Output
Output
Buffer
Buffer
Buffer
Revision 121598
20 MHz
25 MHz
14.318 MHz
MK2014A
Printed 11/15/00

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mk2014a Summary of contents

Page 1

... Description The MK2014A is the ideal way to generate clocks for Fast Ethernet cards or systems. It provides 20MHz and 25MHz clocks from an inexpensive 14.31818 MHz crystal or clock pin SOIC, the MK2014A can save component count, board space, and cost over surface mount crystals and oscillators, and increase reliability by eliminating mechanical devices from the board ...

Page 2

... MHz buffered crystal clock output. Crystal Connection to a 14.31818 MHz crystal, or leave unconnected for clock input. 2 Fast Ethernet Clock Source 14.3 MHz in (crystal caps not shown) Pin (optional (optional terminating resistors Revision 121598 MK2014A 14.3MHz out 20MHz out Printed 11/15/00 ...

Page 3

... Referenced to GND Referenced to GND Max of 20 seconds Clock input Clock input IOH=-4mA IOH=-25mA IOL=25mA No Load No Load With exact crystal Time above 2.5V 0.8 to 2.0V 2.0 to 0.8V Time above 1.5V All outputs 3 MK2014A Fast Ethernet Clock Source Minimum Typical Maximum 7 -0.5 VDD+.5V -0.5 VDD+. 260 -65 150 4.5 5.5 3 ...

Page 4

... MicroClock Division of ICS • 525 Race Street • San Jose • CA • 95126•(408)295-9800tel•(408)295-9818fax C LOC 45° Marking Package MK2014A 8 pin SOIC MK2014A Add tape and reel 4 MK2014A Fast Ethernet Clock Source Inches Inches Millimeters Millimeters Symbol Min Max Min A 0.055 0.070 1.397 b ...

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