ICS0004AI01L datasheet(1/16 Pages) IDT

部件名	ICS0004AI01L

功能描述	FEMTOCLOCKS??CRYSTAL-TOLVCMOS/LVTTL FREQUENCY SYNTHESIZER

PDF	16 Pages

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制造商	IDT [Integrated Device Technology]

网页	http://www.idt.com

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1 / 16 page

840004AGI-01

1

REV. A OCTOBER 22, 2007

ICS840004I-01

FEMTOCLOCKS™ CRYSTAL-TO-

LVCMOS/LVTTL FREQUENCY SYNTHESIZER

GENERAL DESCRIPTION

The ICS840004I-01 is a 4 output LVCMOS/LVTTL

Synthesizer optimized to generate Ethernet

reference clock frequencies and is a member of

the HiPerClocksTM family of high performance

clock solutions from I

DT. Using a 25MHz, 18pF

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 ICS840004I-01 uses

I

DT’s 3rd generation low phase noise VCO technology and can

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

meeting Ethernet jitter requirements. The ICS840004I-01 is

packaged in a small 20-pin TSSOP package.

HiPerClockS™

ICS

BLOCK DIAGRAM

FEATURES

• Four LVCMOS/LVTTL outputs,

17

Ω typical output impedance

• Selectable crystal oscillator interface

or LVCMOS single-ended input

• Supports the following output frequencies: 156.25MHz,

125MHz and 62.5MHz

• VCO range: 560MHz - 700MHz

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

0.52ps (typical)

• Output supply modes:

Core/Output

3.3V/3.3V

3.3V/2.5V

2.5V/2.5V

• -40°C to 85°C ambient operating temperature

• Available in both standard (RoHS 5) and lead-free RoHS

(6) packages

Q0

Q1

Q2

Q3

OE

F_SEL1:0

nPLL_SEL

nXTAL_SEL

XTAL_IN

XTAL_OUT

REF_CLK

MR

OSC

Phase

Detector

VCO

M = ÷25 (fixed)

F_SEL1:0

0 0 ÷4

0 1 ÷5

1 0 ÷10

1 1 ÷5 (default)

0

1

0

2

N

25MHz

Pullup

Pulldown

Pullup:Pullup

Pulldown

FREQUENCY SELECT FUNCTION TABLE

PIN ASSIGNMENT

ICS840004I-01

20-Lead TSSOP

6.5mm x 4.4mm x 0.92mm

package body

G Package

Top View

F_SEL0

nc

nXTAL_SEL

REF_CLK

OE

MR

nPLL_SEL

VDDA

nc

VDD

1

2

3

4

5

6

7

8

9

10

20

19

18

17

16

15

14

13

12

11

F_SEL1

GND

Q0

Q1

VDDO

Q2

Q3

GND

XTAL_IN

XTAL_OUT

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类似零件编号 - ICS0004AI01L

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类似说明 - ICS0004AI01L

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