83904A02 datasheet(1/15 Pages) ICST

Part #	83904A02

Description	LOW SKEW, 1-TO-4 CRYSTAL-TO-LVCMOS/LVTTL FANOUT BUFFER

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Manufacturer	ICST [Integrated Circuit Systems]

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Integrated

Circuit

Systems, Inc.

83904AG-02

www.icst.com/products/hiperclocks.html

REV. A JULY 8, 2005

1

ICS83904-02

LOW SKEW, 1-TO-4

CRYSTAL-TO-LVCMOS/LVTTL FANOUT BUFFER

PRELIMINARY

FEATURES

• Four LVCMOS/LVTTL outputs,

19

Ω typical output impedance

• Two Crystal oscillator input pairs

One LVCMOS/LVTTL clock input

• Crystal input frequencry range: 10MHz - 40MHz

• Output frequency: 200MHz (typical)

• Output Skew: TBD

• Part to Part Skew: TBD

• RMS phase jitter @ 25MHz output, using a 25MHz crystal

(100Hz - 1MHz): 0.16ps (typical) @ V

DD = VDDO = 3.3V

• RMS phase noise at 25MHz:

Offset

Noise Power

100Hz .............. -118.4 dBc/Hz

1kHz .............. -141.5 dBc/Hz

10kHz .............. -157.2 dBc/Hz

100kHz .............. -157.2 dBc/Hz

• Supply Voltage Modes:

(Core/Output)

3.3V/3.3V

3.3V/2.5V

3.3V/1.8V

2.5V/2.5V

2.5V/1.8V

• 0°C to 70°C ambient operating temperature

• Industrial temperature available upon request

GENERAL DESCRIPTION

The ICS83904-02 is a low skew, high perfor-

mance 1-to-4 Crystal Oscillator/Crystal-to-

LVCMOS Fanout Buffer and a member of the

HiPerClockS™ family of High Performance Clock

Solutions from ICS. The ICS83904-02 has

selectable single ended clock or two crystal-oscillator inputs.

There is an output enable to disable the outputs by placing them

into a high-impedance state.

Guaranteed output and part-to-part skew characteristics

make the ICS83904-02 ideal for those applications demanding

well defined performance and repeatability.

HiPerClockS™

ICS

BLOCK DIAGRAM

OE

CLK_SEL0

CLK_SEL1

CLK

Q0

Q3

OSC

0 0

0 1

1 0

1 1

Pullup

ICS83904-02

16-LeadTSSOP

4.4mm x 5.0mm x 0.92mm

package body

G Package

Top View

Pulldown

XTAL_IN0

XTAL_OUT0

XTAL_IN1

XTAL_OUT1

Pulldown

4 LVCMOS Outputs

CLK_SEL0

XTAL_OUT0

XTAL_IN0

VDD

XTAL_IN1

XTAL_OUT1

CLK_SEL1

CLK

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

VDDO

Q0

Q1

GND

Q2

Q3

VDDO

OE

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.

PIN ASSIGNMENT

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