Datasheet > MK1432

MK1432

更新时间： 2024-11-30 22:30:07

品牌	Logo	应用领域
矽成 - ICSI		PC 时钟
页数	文件大小	规格书
4页	65K
描述
Green PC and Local Bus Clock Source

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数据手册

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MK1432 数据手册

MK1432/MK1434

Green PC and Local Bus Clock Source

Features

Description

The MK1432 and MK1434 are low cost, high

• Packaged in 16 pin narrow (150 mil) SOIC

• Supports all Pentium™ Processor 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)

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.

• 5V or 3.3V (up to 80MHz) operation

• Smooth transitions for Pentium and 486 based

Green PC

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.

• 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

VDD GND

Output

2XCPU

Buffer

FS0

FS1

FS2

CPU

Clocks

Output

Buffer

÷2

CPU

BCLKS

Local

Bus

Clock

Output

Buffer

BCLK

40.00 (MK1434)

or 24.00 MHz

(MK1432)

Fixed

Clock

Output

Buffer

Crystal

Oscillator

14.318 MHz

crystal

Output

Buffer

14.318 MHz

MDS 1432 G

Revision 060101

Integrated Circuit Systems, Inc. • 525 Race Street • San Jose • CA • 95126 • (408)295-9800 • www.icst.com

12 3 4

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MK1432FE-R52	OHMITE	获取价格	RES 14.3K OHM 1/4W 1% AXIAL
MK1432S	ICSI	获取价格	Green PC and Local Bus Clock Source
MK1432SLF	IDT	获取价格	Processor Specific Clock Generator, 100MHz, PDSO16, 0.150 INCH, SOIC-16
MK1432STR	ICSI	获取价格	Green PC and Local Bus Clock Source
MK1432STRLF	IDT	获取价格	Processor Specific Clock Generator, 100MHz, PDSO16, 0.150 INCH, SOIC-16
MK1433FE-R52	OHMITE	获取价格	RES 143K OHM 1/4W 1% AXIAL
MK1434S	ICSI	获取价格	Green PC and Local Bus Clock Source
MK1434STR	ICSI	获取价格	Green PC and Local Bus Clock Source
MK1434STRLF	IDT	获取价格	Processor Specific Clock Generator, 100MHz, PDSO16, 0.150 INCH, SOIC-16
MK1442	ICSI	获取价格	SCSI and Ethernet Clock Source