Datasheet > MK2771-13STR

MK2771-13STR

更新时间： 2024-11-20 22:14:47

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	66K
描述
VCXO and Set-Top Clock Source

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数据手册

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MK2771-13STR 数据手册

MK2771-13

VCXO and Set-Top Clock Source

Description

Features

The MK2771-03 is a low cost, low jitter, high

performance VCXO and clock synthesizer

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 ICS/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, a selectable audio clock, a fixed 33.33 MHz

or 24.576 MHz, two low skew copies of the

27MHz, and a fixed 13.5 MHz. All clocks are

frequency locked to the 27.00MHz output (and to

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

be used as the VCXO output.

• Packaged in 20 pin SOIC

• Pin for pin and functional upgrade to MK2771-03

• Ideal for systems using Oak’s MPEG decoders

• On-chip patented VCXO with pull range

of 200ppm

• VCXO tuning voltage of 0 to 3V

• Processor frequency of 16.67 MHz, 20 MHz,

25 MHz, 32 MHz, 40 MHz, or 50 MHz

• Audio clocks of 8.192, 11.2896, and 12.288 MHz

• Zero ppm synthesis error in all clocks (all exactly

track 27MHz VCXO) - patented

• Uses an inexpensive 13.5 MHz crystal

• 25mA output drive capability at TTL levels

• Advanced, low power, sub-micron CMOS process

• 5V operating voltage

This chip directly replaces the MK2771-03 when a

13.5 MHz input crystal is substituted for the

14.31818 MHz used on the -03. Additionally, the

-13 adds 25 MHz to the processor clock selection,

and 24.576 MHz on the BCLK.

VDD GND

Block Diagram

Output

PCS1:0

ACS1:0

Processor Clock

Buffer

Output

Audio Clock

Buffer

Clock

Synthesis

Circuitry

BCS

VIN

Output

Buffer

33.3 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 2771-13 A

Revision 110298

Printed 11/16/00

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

12 3 4

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