ICS84025中文资料

元器件交易网

PRELIMINARY

IntegratedCircuit

Systems, Inc.

CRYSTAL-TO-LVCMOS / LVTTL

FREQUENCY SYNTHESIZER WITH FANOUT BUFFER

FEATURES

6 LVCMOS/LVTTL outputs Crystal oscillator interface

Output frequency range: 53.125MHz to 125MHz Crystal input frequency: 25MHz and 25.5MHz RMS phase jitter at 106.25, using a 25.5MHz crystal(637KHz to 10MHz): 3.25ps Phase noise:100Hz.................-100 dBc/Hz1KHz.................-115 dBc/Hz10KHz.................-125 dBc/Hz100KHz.................-127 dBc/Hz

3.3V core, outputs may either be 3.3V, 2.5V or 1.8V 0°C to 70°C ambient operating temperature

Industrial temperature information available upon request

ICS84025

GENERAL DESCRIPTION

The ICS84025 is a Crystal-to-LVCMOS/LVTTLFrequency Synthesizer with Fanout Buffer and

a member of the HiPerClockS family of HighPerformance Clock Solutions from ICS. TheVCO frequency is programmed in steps equal

to the value of the crystal frequency. The VCO andoutput frequency can be programmed using the feedback andoutput frequency select pins. The low phase noise character-istics of the ICS84025 make it an ideal clock source for FibreChannel 1 and Gigabit Ethernet applications.

FUNCTION TABLE

Inputs

MR10000

F_SEL1X0011

F_SEL0X0101

25.5MHz25.5MHz25MHz25MHzXTAL

OutputFrequency

F_OUTLOW53.125MHz106.25MHz62.5MHz125MHz

BLOCK DIAGRAMPIN ASSIGNMENT

VDDOQ0GNDQ1VDDOQ2GNDQ3VDDOQ4GNDQ5

123456789101112

242322212019181716151413

F_SEL0F_SEL1MRXTAL1XTAL2GNDVDDAVDD

PLL_SELGNDncVDDO

24-Lead, 300-MIL SOIC

7.5mm x 15.33mm x 2.3mm body package

M PackageTop View

F_SEL1

PLL_SEL

MR

F_SEL0

ICS84025

The Preliminary Information presented herein represents a product in prototyping or pre-production. The noted characteristics are based on initialproduct characterization. Integrated Circuit Systems, Incorporated (ICS) reserves the right to change any circuitry or specifications without notice.

84025EM

/products/hiperclocks.html

1

REV. A APRIL 16, 2003

百度搜索“77cn”或“免费范文网”即可找到本站免费阅读全部范文。收藏本站方便下次阅读，免费范文网，提供经典小说教育文库ICS84025中文资料在线全文阅读。