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MK1442-02S の電気的特性と機能

MK1442-02SのメーカーはIntegrated Circuit Systemsです、この部品の機能は「SCSI and Ethernet Clock Source」です。


製品の詳細 ( Datasheet PDF )

部品番号 MK1442-02S
部品説明 SCSI and Ethernet Clock Source
メーカ Integrated Circuit Systems
ロゴ Integrated Circuit Systems ロゴ 




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MK1442-02S Datasheet, MK1442-02S PDF,ピン配置, 機能
MK1442/MK1443
SCSI and Ethernet Clock Source
Description
Features
The MK1442/3 are the ideal way to generate
clocks for desktop computer motherboards and
LAN workstations. Using analog Phase-Locked
Loop (PLL) techniques, the devices accept a
14.318 MHz crystal input to produce multiple
output clocks up to 100 MHz. They provide
2XCPU, CPU, floppy controller, keyboard,
system, SCSI and Ethernet clocks. The MK1442/3
are perfect for new Pentium™ Processor, PCI bus
and 486 systems. The devices can operate at 5V or
3.3V up to and including 80MHz on the CPU
clock.
The devices are identical except the MK1442 has
an Output Enable (OE) pin that tri-states all
outputs when taken low, and the MK1443 has an
extra 14.318 MHz clock.
Block Diagram
VDD GND
• Provides exact frequency Ethernet and SCSI clocks
• 5V or 3.3V (up to 80MHz) operation
• Output clock frequencies up to 100 MHz
• Pentium™ Processor compatible timing
• 486 compatible smooth frequency transitions
• Seven or eight output clocks
• Compatible with X86 and 680X0 CPUs
• Skew controlled 2X and 1X CPU to within 250ps
• Packaged in 16 pin skinny SOIC or PDIP
• Duty cycle of 47.5/52.5 up to 66.66 MHz
• Duty cycle of 45/55 up to 100 MHz
• Total of 15 different selectable CPU frequencies
• Tri-state outputs for board level testing
• 25mA drive capability at TTL levels
• Keyboard frequencies of 12MHz (-01),
8MHz (-02), or 16MHz (-03)
• Advanced, low power CMOS process
• MK1442 - output enable
• MK1443 - two 14.318 MHz outputs
CPUS0
CPUS1
14.318 MHz
crystal
X1
X2
Crystal
Oscillator
Clock Synthesis
and Control
Circuitry
Output
Buffer
÷2
Output
Buffer
Output
Buffer
Output
Buffer
Output
Buffer
Output
Buffer
Output
Buffer
Output
Buffer
2XCPU
CPU
8.00, 12.00,
or 16.00 MHz
24.00 MHz
40.000 MHz
20.000 MHz
14.318 MHz
(MK1443 only)
14.318 MHz
OE (all outputs, MK1442 only)
MDS 1442/3 E
1
Revision 111500
Printed 11/15/00
Integrated Circuit Systems, Inc. • 525 Race Street • San Jose • CA • 95126 •(408)297-1201tel • www.icst.com

1 Page





MK1442-02S pdf, ピン配列
MK1442/MK1443
SCSI and Ethernet Clock Source
Electrical Specifications
Parameter
Conditions
ABSOLUTE MAXIMUM RATINGS (note 1)
Minimum Typical Maximum Units
Supply voltage, VDD
Referenced to GND
7V
Inputs and Clock Outputs
Referenced to GND
-0.5
VDD+0.5 V
Ambient Operating Temperature
0 70 °C
Soldering Temperature
Max of 20 seconds
260 °C
Storage Temperature
DC CHARACTERISTICS (VDD = 5V unless noted)
-65
150 °C
Operating Voltage, VDD
3.0 5.5 V
Input High Voltage, VIH
OE (pin 10)
2.0
V
Input Low Voltage, VIL
OE (pin 10)
0.8 V
Input High Voltage, VIH
CPUS0,1 (pins 1,16)
VDD-0.5
V
Input Mid-level Voltage
CPUS0,1 (pins 1,16) Leave pin unconnected or tri-stated
V
Input Low Voltage, VIL
CPUS0,1 (pins 1,16)
0.5 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
Input High Voltage, VIH
VDD=3.3V, OE pin
1.9
V
Input Low Voltage, VIL
VDD=3.3V, OE pin
0.4 V
Output High Voltage, VOH
VDD=3.3V, IOH=-8mA
2.4
V
Output Low Voltage, VOL
VDD=3.3V, IOL=8mA
0.4 V
Operating Supply Current, IDD
No Load, 80 MHz
35 mA
Short Circuit Current
Each output
±100
mA
On-Chip Pull-up Resistor
250 k
Input Capacitance
7 pF
Frequency Accuracy of 20.000 MHz clock
0-70°C, note 2
AC CHARACTERISTICS (VDD = 5V unless noted)
-1
1 ppm
Input Frequency
14.31818
MHz
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, CPU and 2XCPU 1.5V, up to 67MHz
47.5
49 to 51
52.5
%
Output Clock Duty Cycle
At 1.5V
45
49 to 51
55
%
Cycle to Cycle Jitter
50-80 MHz clocks
250 ps
Skew of 2XCPU with respect to CPU
Rising edges at 1.5V
-250
0 250 ps
Transition time, 8MHz to 100MHz
VDD=3.3 or 5V
4 ms
Transition time, 100MHz to 8MHz
VDD=3.3 or 5V
2.5 ms
Output Enable Time, OE high to output on
VDD=3.3 or 5V
50 ns
Output Disable Time, OE low to tri-state
VDD=3.3 or 5V
3 µs
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. Provided proper crystal and capacitor components are used - consult MicroClock.
MDS 1442/3 E
3
Revision 111500
Printed 11/15/00
Integrated Circuit Systems, Inc. • 525 Race Street • San Jose • CA • 95126 •(408)297-1201tel • www.icst.com


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部品番号部品説明メーカ
MK1442-02S

SCSI and Ethernet Clock Source

Integrated Circuit Systems
Integrated Circuit Systems


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