Datasheet > 40002A01

40002A01

更新时间： 2022-09-19 00:08:56

品牌	Logo	应用领域
矽成 - ICSI		/
页数	文件大小	规格书
12页	197K
描述
FEMTOCLOCKS? CRYSTAL-TO LVCMOS/LVTTL FREQUENCY SYNTHESIZER

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40002A01 数据手册

ICS840002-01

FEMTOCLOCKS™ CRYSTAL-TO-

LVCMOS/LVTTL FREQUENCY SYNTHESIZER

Integrated

Circuit

Systems, Inc.

GENERAL DESCRIPTION

FEATURES

The ICS840002-01 is a 2 output LVCMOS/LVTTL • Two LVCMOS/LVTTL outputs @ 3.3V,

ICS

HiPerClockS™

Synthesizer optimized to generate Ethernet

reference clock frequencies and is a member of

the HiPerClocks^TMfamily of high performance

clock solutions from ICS. Using a 25MHz 18pF

17Ω typical output impedance

• Selectable crystal oscillator interface

or LVCMOS/LVTTL single-ended input

• Output frequency range: 56MHz - 175MHz

• VCO range: 560MHz - 700MHz

parallel resonant crystal, the following frequencies can be

generated based on the 2 frequency select pins (F_SEL1:0):

156.25MHz, 125MHz, and 62.5MHz.The ICS840002-01 uses

ICS’ 3^rdgeneration low phase noise VCO technology and can

achieve 1ps or lower typical random rms phase jitter, easily

meeting Ethernet jitter requirements. The ICS840002-01 is

packaged in a small 16-pin TSSOP package.

• Output skew: 12ps (maximum)

• RMS phase jitter at 156.25MHZ (1.875MHz - 20MHz):

0.47ps (typical)

Phase noise:

Offset

Noise Power

100Hz ............... -97.4 dBc/Hz

1kHz ..............-120.2 dBc/Hz

10kHz ..............-127.6 dBc/Hz

100kHz ..............-126.1 dBc/Hz

• Full 3.3V or 3.3V core/2.5V output supply mode

• -30°C to 85°C ambient operating temperature

• Available in both standard and lead-free RoHS compliant

packages

FREQUENCY SELECT FUNCTION TABLE

Inputs

Output Frequency

(25MHz Ref.)

F_SEL1 F_SEL0 M Divider Value N Divider Value

156.25

125

62.5

125

BLOCK DIAGRAM

PIN ASSIGNMENT

Pullup

F_SEL0

nXTAL_SEL

TEST_CLK

nPLL_SEL

V^DDA

F_SEL1

GND

V^DDO

XTAL_IN

XTAL_OUT

Pullup:Pullup

F_SEL1:0

Pulldown

nPLL_SEL

Pulldown

nXTAL_SEL

25MHz

XTAL_IN

VDD

F_SEL1:0

OSC

ICS840002-01

16-LeadTSSOP

4.4mm x 5.0mm x 0.92mm

package body

0 0 ÷4

XTAL_OUT

Pulldown

0 1 ÷5

1 0 ÷10

1 1 ÷5

Phase

Detector

TEST_CLK

VCO

G Package

Top View

M = ÷25 (fixed)

Pulldown

840002AG-01

www.icst.com/products/hiperclocks.html

REV.B JANUARY 13, 2006

12 3 4 5 6 7...12

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