Datasheet > MK2772-01S

MK2772-01S

更新时间： 2024-11-24 22:21:55

品牌	Logo	应用领域
矽成 - ICSI		晶体外围集成电路石英晶振压控振荡器光电二极管时钟
页数	文件大小	规格书
4页	68K
描述
VCXO and Set-Top Clock Source

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数据手册

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MK2772-01S 数据手册

MK2772-01

VCXO and Set-Top Clock Source

_{ICR O}C_{LOC K}

Description

Features

• Packaged in 20 pin SOIC

The MK2772-01 is a low cost, low jitter, high

performance VCXO and clock synthesizer 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. All clocks are

frequency locked to the 27.00MHz output (and to

each other) with zero ppm error. The MK2772

includes a glitch-free multiplexer to switch input

sources during operation.

• Uses an inexpensive 13.5 MHz crystal

• On-chip VCXO (patented) with pull range

of 200ppm (minimum)

• Ability to switch input sources “on-the-fly”

• VCXO tuning voltage of 0 to 3V

• Zero ppm synthesis error (patented) in all

clocks. All exactly track 27MHz VCXO

• All clocks are frequency locked. All will vary the

same amount (in ppm) as the VCXO

MicroClock manufactures the largest variety of

Set-Top Box and multimedia clock synthesizers

for all applications. Consult MicroClock to

eliminate VCXOs, crystals and oscillators from

your board.

• Selectable Audio clock for 256x, 384x, and 512x.

• 25mA output drive capability at TTL levels

• Advanced, low power, sub-micron CMOS process

• 5V operating voltage

Block Diagram

GND

VDD

Output

Audio Clock

Buffer

ACS1:0

Output

Buffer

Clock

Synthesis

Circuitry

16.6667 MHz

11.0592 MHz

INMUXSEL

Output

Buffer

EXTCLKIN

VIN

Output

Buffer

3.6864 MHz

27.000 MHz

13.5 MHz

Voltage Controlled

Crystal Oscillator

and x2 PLL

pullable

crystal

Output

Buffers

deglitched

mux

MDS 2772-01 B

Revision 012098

Printed 11/16/00

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

12 3 4

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