Datasheet > 1A31

1A31

更新时间： 2024-11-01 07:20:11

品牌	Logo	应用领域
矽成 - ICSI		/
页数	文件大小	规格书
9页	162K
描述
FEMTOCLOCKS-TM CRYSTAL -TO LVCMOS/LVTTL FREQUENCY SYNTHESIZER

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数据手册

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1A31 数据手册

PRELIMINARY

ICS840001-31

Integrated

Circuit

Systems, Inc.

FEMTOCLOCKS™ CRYSTAL-TO-

LVCMOS/LVTTL FREQUENCY SYNTHESIZER

GENERAL DESCRIPTION

FEATURES

The ICS840001-31 is a two output LVCMOS/ • (2) LVCMOS/LVTTL outputs, 20Ω typical output impedence

ICS

LVTTL Synthesizer and a member of the

HiPerClocks^TMfamily of high performance

devices from ICS. One output is the LVCMOS/

LVTTL main synthesized clock output (Q) and one

(1) Main clock output (Q)

(1) Three-state reference clock output (REF_CLK)

HiPerClockS™

• Crystal oscillator interface can accept 26.5625MHz or

40MHz 18pF parallel resonant crystals

output is a three-state LVCMOS/LVTTL reference clock

(REF_CLK) output at the frequency of the crystal oscillator.

The device can accept 26.5625MHz and 40MHz crystals and

can synthesize 106.25MHz or 100MHz outputs. The

ICS840001-31 has excellent <1ps phase jitter performance

over the 637kHz – 10MHz integration range.The ICS840001-

31 is packaged in a 3mm x 3mm 16-pin VFQFN, making it

ideal for use on space constrained boards.

• Output frequency range: 106.25MHz or 100MHz

• VCO range: 490MHz to 640MHz

• RMS phase jitter @ 106.25MHz, using a 26.5625MHz crystal

(637kHz - 10MHz): 0.38ps (typical)

• 3.3V operating supply

• 0°C to 70°C ambient operating temperature

FUNCTION TABLE

Inputs

Outputs

Application

Fibre Channel

VCO

REF_CLK

Crystal

(MHz)

637.5

600

Frequency (MHz) Frequency (MHz)

26.5625

106.25

100

High-Z

1 (or Floating) 1 (or Floating)

Serial Attached (SCSI)

BLOCK DIAGRAM

PIN ASSIGNMENT

(Pullup)

REF_CLK

16 15 14 13

XTAL_IN

11 V^DDO

10 GND

XTAL_IN

OSC

XTAL_OUT

VCO

Phase

Detector

XTAL_OUT

÷6

490MHz - 640MHz

V^DD

1 = ÷15 (default)

0 = ÷24

ICS840001-31

16-LeadVFQFN

(Pullup)

3mm x 3mm x 0.95 package body

K Package

TopView

The Preliminary Information presented herein represents a product in prototyping or pre-production.The noted characteristics are based on initial

product characterization. Integrated Circuit Systems, Incorporated (ICS) reserves the right to change any circuitry or specifications without notice.

840001AK-31

www.icst.com/products/hiperclocks.html

REV. A MAY 4, 2005

12 3 4 5 6 7...9

中文翻译

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