Datasheet > MK2771-12

MK2771-12

更新时间： 2024-11-20 22:46:15

品牌	Logo	应用领域
矽成 - ICSI		石英晶振压控振荡器时钟
页数	文件大小	规格书
4页	72K
描述
VCXO and Set-Top Clock Source

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MK2771-12 数据手册

MK2771-12

VCXO and Set-Top Clock Source

_{ICR O}C_{LOC K}

Description

Features

The MK2771-12 is a low cost, low jitter, high

performance VCXO and clock synthesizer

• Packaged in 20 pin SOIC

designed for set-top boxes. The on-chip Voltage

Controlled Crystal Oscillator accepts a 0 to 3V

input voltage to cause the output clocks to vary by

±100 ppm. Using MicroClock’s patented VCXO

and analog Phase-Locked Loop (PLL) techniques,

the device uses an inexpensive 13.5 MHz crystal

input to produce multiple output clocks including

a selectable processor clock, selectable UART and

audio clocks, a fixed 11.0592 MHz, and two low

skew copies of the 27 MHz. All clocks are

• Pin for pin and functional upgrade to MK2771-02

• Uses an inexpensive 13.5 MHz crystal

• On-chip patented VCXO with pull range

of 200 ppm

• VCXO tuning voltage of 0 to 3 V

• Processor frequency of 16.67 MHz, 20 MHz,

32 MHz, 40 MHz, or 50 MHz

frequency locked to the 27.00 MHz output (and

to each other) with zero ppm error, so any output

can be used as the VCXO output.

• Zero ppm synthesis error in all clocks (all exactly

track 27MHz VCXO) - patented

• 25 mA output drive capability at TTL levels

• Advanced, low power, sub-micron CMOS process

• 5 V operating voltage

This chip directly replaces the MK2771-02 when a

13.5 MHz input crystal is substituted for the

14.31818 MHz used on the -02. Additionally, the

-12 adds 24.576 MHz to the ACLK.

VDD GND

AVDD

Block Diagram

Output

Processor Clock

Buffer

PCS1:0

Output

11.0592 MHz

Buffer

UCS

ACS

Clock

Synthesis

Circuitry

Output

Buffer

3.6864 MHz

or 18.432 MHz

VIN

Output

Buffer

49.152 MHz

or 24.576 MHz

13.5 MHz

pullable

crystal

Output

Buffers

Voltage

Controlled

Crystal

27.000 MHz

13.500 MHz

Output

Buffer

÷ 2

Oscillator

MDS 2771-12 A

Revision 061699

Printed 11/16/00

MicroClock Division of ICS • 525 Race Street • San Jose • CA • 95126•(408)295-9800tel•(408)295-9818fax

12 3 4

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与MK2771-12相关器件

型号	品牌	获取价格	描述	数据表
MK2771-12S	ICSI	获取价格	VCXO and Set-Top Clock Source
MK2771-12STR	ICSI	获取价格	VCXO and Set-Top Clock Source
MK2771-13	ICSI	获取价格	VCXO and Set-Top Clock Source
MK2771-13S	ICSI	获取价格	VCXO and Set-Top Clock Source
MK2771-13STR	ICSI	获取价格	VCXO and Set-Top Clock Source
MK2771-15	ICSI	获取价格	VCXO and Set-Top Clock Source
MK2771-15R	ICSI	获取价格	VCXO and Set-Top Clock Source
MK2771-15RTR	ICSI	获取价格	VCXO and Set-Top Clock Source
MK2771-16	ICSI	获取价格	VCXO and Set-Top Clock Source
MK2771-16R	ICSI	获取价格	VCXO and Set-Top Clock Source