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MK1432S の電気的特性と機能

MK1432SのメーカーはIntegrated Circuit Systemsです、この部品の機能は「Green PC and Local Bus Clock Source」です。


製品の詳細 ( Datasheet PDF )

部品番号 MK1432S
部品説明 Green PC and Local Bus Clock Source
メーカ Integrated Circuit Systems
ロゴ Integrated Circuit Systems ロゴ 




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MK1432S Datasheet, MK1432S PDF,ピン配置, 機能
MK1432/MK1434
Green PC and Local Bus Clock Source
Description
The MK1432 and MK1434 are low cost, high
performance triple clock synthesizers for green PC and
local bus desktop and notebook applications. 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
selectable 2XCPU and CPU, selectable local bus clock,
ISA clock, and one fixed peripheral clock. The chips
support PCI and VL buses. The fixed clock is either
24MHz or 40MHz. The devices can operate at 5V or
3.3V up to and including 80MHz on the 2XCPU clock.
The Power Saving pin causes the CPU clocks to
smoothly transition to 33.33 MHz for Pentiums, and
16.67 MHz for 486DX4. In addition, a single pin can be
made to slow DX2s to 8 MHz.
Features
• Packaged in 16 pin narrow (150 mil) SOIC
• Supports all PentiumProcessor timing specs
• Supports synchronous and asynchronous local bus
• Selectable local bus frequencies of 25, 33, or
50MHz
• SCSI or VL bus 40MHz clock on MK1434
• Floppy or super I/O clock on MK1432
• Single Power Saving pin switches to low power
mode (for 486 and Pentium)
• 5V or 3.3V (up to 80MHz) operation
• Smooth transitions for Pentium and 486 based
Green PC
• Low skew (<250ps) Pentium compatible
2X and 1X outputs
• Duty cycle of 45/55 up to 100 MHz
• 25mA output drive capability at TTL levels
• Compatible with all popular microprocessors
• Packaged in 16 pin narrow SOIC
• For Early Clock support, consult MicroClock
Block Diagram
FS0
FS1
FS2
PS
VDD GND
CPU
Clocks
Output
Buffer
÷2 Output
Buffer
2XCPU
CPU
BCLKS
14.318 MHz
crystal
X1
X2
Crystal
Oscillator
Local
Bus
Clock
Fixed
Clock
Output
Buffer
Output
Buffer
Output
Buffer
BCLK
40.00 (MK1434)
or 24.00 MHz
(MK1432)
14.318 MHz
MDS 1432 G
1 Revision 060101
Integrated Circuit Systems, Inc. • 525 Race Street • San Jose • CA • 95126 • (408)295-9800 • www.icst.com

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MK1432S pdf, ピン配列
MK1432/MK1434
Green PC and Local Bus Clock Source
Electrical Specifications
Parameter
Conditions
Minimum Typical Maximum Units
ABSOLUTE MAXIMUM RATINGS (note 1)
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
-65 150 °C
DC CHARACTERISTICS (VDD = 5V unless noted)
Operating Voltage, VDD
3.0 5.5 V
Input High Voltage, VIH
2V
Input Low Voltage, VIL
0.8 V
Mid-level pin Input High Voltage, VIH
Pin 9 only
VDD-0.5
V
Mid-level pin Input Low Voltage, VIL
Pin 9 only
0.5 V
Output High Voltage, VOH
IOH=-25mA
2.4
V
Output Low Voltage, VOL
IOL=25mA
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, note 2
40 mA
Operating Supply Current, IDDPS
No Load, PS=0
27 mA
Short Circuit Current
Each output (except X2)
±100
mA
On-Chip Pull-up Resistor
Pins 1, 8, 10, 16
250 k
Input Capacitance
7 pF
AC CHARACTERISTICS (VDD = 5V unless noted)
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
At VDD/2
45
49 to 51
55
%
Cycle to Cycle Jitter, CPU Clocks
1000
ps
Absolute Clock Period Jitter
14-40 MHz clocks
-500
500 ps
Skew of 2XCPU with respect to CPU
Rising edges at 1.5V
-250
0 250 ps
Transition time, 33.3MHz to 66.6MHz
VDD=3.3 or 5V
3 ms
Transition time, 66.6MHz to 33.3MHz
VDD=3.3 or 5V
2 ms
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. With 2XCPU clock at 66.66MHz, and BCLK at 33.33MHz
External Components
The MK1432/4 requires a minimum number of external components for proper operation. Decoupling capacitors of
0.1µF should be connected between VDD and GND, as close to the MK1432/4 as possible. A series termination
resistor of 33may be used for each clock output. The device does not require (nor do we recommend) capacitors
connected to the crystal pins. The 14.31818 MHz crystal must be connected as close to the chip as possible.
Recommended load capacitance for the crystal is 12pF.
MDS 1432 G
3 Revision 060101
Integrated Circuit Systems, Inc. • 525 Race Street • San Jose • CA • 95126 • (408)295-9800 • www.icst.com


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共有リンク

Link :


部品番号部品説明メーカ
MK1432

Green PC and Local Bus Clock Source

Integrated Circuit Systems
Integrated Circuit Systems
MK1432S

Green PC and Local Bus Clock Source

Integrated Circuit Systems
Integrated Circuit Systems
MK1432STR

Green PC and Local Bus Clock Source

Integrated Circuit Systems
Integrated Circuit Systems


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