Datasheet > MK2771-15RTR

MK2771-15RTR

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	67K
描述
VCXO and Set-Top Clock Source

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MK2771-15RTR 数据手册

MK2771-15

VCXO and Set-Top Clock Source

Description

Features

The MK2771-15 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 pullable crystal input to produce

multiple output clocks including two selectable

processor clocks, a selectable audio clock, two

communications clocks, and three fixed clocks. 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 28 pin SSOP (QSOP)

• Ideal for systems using Oak’s MPEG decoders

• On-chip patented VCXO with pull range

of 200ppm

• VCXO tuning voltage of 0 to 3 V

• Processor frequencies include 33.3, 40, 50, 66.6,

81, and 100 MHz

• Audio clocks of 8.192 MHz, 11.2896 MHz,

12.288 MHz and 18.432 MHz

• Zero ppm synthesis error in all clocks (all exactly

track 27 MHz VCXO)

• Uses an inexpensive 13.5 MHz pullable crystal

• Full CMOS output swings with 25 mA output

drive capability at TTL levels

• Advanced, low power, sub-micron CMOS process

• 5 V operating voltage with 3.3 V capable I/O

VDD GND

Block Diagram

VDDIO

Output

Buffers

Processor Clocks

Audio Clock

PCS2:0

ACS1:0

Output

Buffer

Clock

Synthesis

Circuitry

Output

Buffers

Comm. Clocks

VIN

Output

Buffer

54.00 MHz

13.5 MHz

pullable

crystal

Output

Buffer

Voltage

Controlled

Crystal

÷ 2

27.000 MHz

Output

Buffer

Oscillator

13.500 MHz

MDS 2771-15 E

Revision 122899

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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