Datasheet > MK3234

MK3234

更新时间： 2024-11-09 22:30:07

品牌	Logo	应用领域
矽成 - ICSI		便携式时钟
页数	文件大小	规格书
4页	71K
描述
Portable System Clock Synthesizer

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MK3234 数据手册

MK3234

Portable System Clock Synthesizer

_{ICR O}C_{LOC K}

Description

Features

• Input crystal frequency of 32.768 kHz

• Lowest power solution available

• Lowest profile clock solution where height is critical

• Output clock frequencies up to 50 MHz

• Three output clocks

The MK3234 is the smallest size, lowest power system

clock synthesizer available. It is the ideal way to

generate clocks for portable computers and other

devices where low power is required. Using analog

Phase-Locked Loop (PLL) techniques, the device

operates from a single 32.768 kHz crystal to produce

the 32.768kHz, CPU, and ISA bus (system) output

clocks.

• 3.3V or 5.0V operation

The device has an individual power down pin for the

CPU clock, and a power down pin for the entire device.

• Duty cycle of 45/55

• Eight selectable CPU frequencies

• CPU clock power down

The MK3234 can save board space and cost even if it

only replaces the 32kHz oscillator circuitry and one

additional surface mount crystal or oscillator. The

extremely low IDD, the ease of surface mounting, the

upgradeability of CPU frequencies, and the power

down capability are added benefits in using the part.

• Separate battery supply pin for 32 kHz runs to 2V

• IDD less than 4µA when 32 kHz running

• Packaged in 16 pin narrow (0.150”) SOIC

Block Diagram

VDD GND

CPUS0

CPUS1

CPUS2

CPU

Output

Buffer

Clock Synthesis

and Control

Circuitry

CPUCLK

PDCPU

System

Clock Synthesis

and Control

Circuitry

Output

Buffer

14.318 MHz

32.768 kHz

VDD32

32.768 kHz

crystal

Crystal

Oscillator

Output

Buffer

MDS 3234 C

Revision 022798

Printed 11/16/00

MicroClock Division of ICS•1271 Parkmoor Ave.•San Jose•CA•95126•(408)295-9800tel•(408)295-9818fax

12 3 4

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与MK3234相关器件

型号	品牌	获取价格	描述	数据表
MK3234-01S	ICSI	获取价格	Portable System Clock Synthesizer
MK3234-01STR	ICSI	获取价格	Portable System Clock Synthesizer
MK3235	ICSI	获取价格	Handheld System Clock Synthesizer
MK3235-01S	ICSI	获取价格	Handheld System Clock Synthesizer
MK3235-01SLF	IDT	获取价格	Clock Generator, 14.3MHz, PDSO16, SOIC-16
MK3235-01SLFTR	IDT	获取价格	Clock Generator, 14.3MHz, PDSO16, SOIC-16
MK3235-01STR	ICSI	获取价格	Handheld System Clock Synthesizer
MK3235-02S	ICSI	获取价格	Handheld System Clock Synthesizer
MK3235-02SLF	IDT	获取价格	Clock Generator, 14.3MHz, PDSO16, SOIC-16
MK3235-02STR	ICSI	获取价格	Handheld System Clock Synthesizer