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MK2014A の電気的特性と機能

MK2014AのメーカーはIntegrated Circuit Systemsです、この部品の機能は「Fast Ethernet Clock Source」です。


製品の詳細 ( Datasheet PDF )

部品番号 MK2014A
部品説明 Fast Ethernet Clock Source
メーカ Integrated Circuit Systems
ロゴ Integrated Circuit Systems ロゴ 




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MK2014A Datasheet, MK2014A PDF,ピン配置, 機能
I CR O C LOC K
MK2014A
Fast Ethernet Clock Source
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. 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.
Features
• Packaged in 8 pin SOIC
• Input crystal or clock frequency of 14.318 MHz
• Lowest jitter in the industry reliably clocks
sensitive Ethernet devices.
• Output clock frequencies of 20.00 MHz and
25.00 MHz
• Zero ppm synthesis error in the output clocks
• Full CMOS outputs with 25mA drive capability
at TTL levels
• 3.3V or 5V±10% supply voltage
• Advanced, low power CMOS process
• Insensitive to input clock duty cycle
Block Diagram
14.31818 MHz
crystal or clock
X1
X2
VDD GND
2
Clock Synthesis
and Control
Circuitry
Crystal
Oscillator
Output
Buffer
Output
Buffer
Output
Buffer
20 MHz
25 MHz
14.318 MHz
MDS 2014A B
1
Revision 121598
Printed 11/15/00
MicroClock Division of ICS • 525 Race Street • San Jose • CA • 95126•(408)295-9800tel•(408)295-9818fax

1 Page





MK2014A pdf, ピン配列
I CR O C LOC K
MK2014A
Fast Ethernet Clock Source
Electrical Specifications
Parameter
Conditions
ABSOLUTE MAXIMUM RATINGS (note 1)
Minimum Typical Maximum Units
Supply Voltage, VDD
Referenced to GND
7V
Inputs
Referenced to GND
-0.5
VDD+.5V
V
Clock Outputs
Referenced to GND
-0.5
VDD+.5V
V
Ambient Operating Temperature
0 70 °C
Soldering Temperature
Max of 20 seconds
260 °C
Storage temperature
DC CHARACTERISTICS (at 5.0V unless otherwise noted)
-65
150 °C
Operating Voltage, VDD
4.5 5.5 V
Input High Voltage, VIH, input clock only
Clock input
3.5 2.5
V
Input Low Voltage, VIL, input clock only
Clock input
2.5 1.5
V
Output High Voltage, VOH
IOH=-4mA
VDD-0.4
V
Output High Voltage, VOH
IOH=-25mA
2.4
V
Output Low Voltage, VOL
IOL=25mA
0.4 V
Operating Supply Current, IDD, 5V
No Load
19 mA
Operating Supply Current, IDD, 3.3V
No Load
10 mA
Input Capacitance
7 pF
Actual Mean Frequency versus Target, note 3
AC CHARACTERISTICS
With exact crystal
0 ppm
Input Clock or Crystal Frequency
14.31818
MHz
Input Crystal Accuracy
30 ppm
Input Clock Duty Cycle, 14.31818MHz
Time above 2.5V
20
80 %
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
Time above 1.5V
45 50 55 %
Absolute Clock Period Jitter, 14.318 MHz output
-400 250
400
ps
Absolute Clock Period Jitter, 20, 25 MHz outputs
-300 150
300
ps
One Sigma Clock Period Jitter
All outputs
70 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.
3. Provided an exact clock input or a properly tuned crystal is used as the reference.
MDS 2014A B
3
Revision 121598
Printed 11/15/00
MicroClock Division of ICS • 525 Race Street • San Jose • CA • 95126•(408)295-9800tel•(408)295-9818fax


3Pages





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部品番号部品説明メーカ
MK2014A

Fast Ethernet Clock Source

Integrated Circuit Systems
Integrated Circuit Systems


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