MK3721 Просмотр технического описания (PDF) - Integrated Circuit Systems

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MK3721

Low Cost 3.3 Volt VCXO

Integrated Circuit Systems 

I CR O C LOC K

MK3721

Low Cost 3.3 Volt VCXO

Electrical Specifications

Parameter

Conditions

ABSOLUTE MAXIMUM RATINGS (note 1)

Supply voltage, VDD

Referenced to GND

Inputs and Clock Outputs

Referenced to GND

Ambient Operating Temperature

Soldering Temperature

Max of 10 seconds

Storage temperature

DC CHARACTERISTICS (VDD = 3.3 V unless noted)

Operating Voltage, VDD

Output High Voltage, VOH

IOH=-12mA

Output Low Voltage, VOL

IOL=12mA

Output High Voltage, VOH, CMOS level

IOH=-4mA

Operating Supply Current, IDD

No Load

Short Circuit Current

VIN, VCXO control voltage

AC CHARACTERISTICS (VDD = 3.3 V unless noted)

Input Crystal Frequency

Input Crystal Accuracy

Output Clock Rise Time

0.8 to 2.0V

Output Clock Fall Time

2.0 to 0.8V

Output Clock Duty Cycle

At VDD/2

Maximum Absolute Jitter, short term

Output frequency pullability, note 2

0V ≤ VIN ≤ 3.3 V

Minimum Typical Maximum Units

7

V

-0.5

VDD+0.5 V

0

70

°C

260

°C

-65

150

°C

3.15

2.4

VDD-0.4

4

±50

0

3.45

V

V

0.4

V

V

mA

mA

3.3

V

16.2

28

MHz

±30

ppm

1.5

ns

1.5

ns

40

50

60

%

±55

ps

±100

ppm

Notes: 1. Stresses beyond those listed under Absolute Maximum Ratings could cause permanent damage to the device. Prolonged

exposure to levels above the operating limits but below the Absolute Maximums may affect device reliability.

2. With a ICS/MicroClock approved pullable crystal.

External Components

The MK3721 requires a minimum number of external components for proper operation. A decoupling

capacitor of 0.01µF should be connected between VDD and GND on pins 2 and 4, as close to the

MK3721 as possible. A series termination resistor of 33 Ω may be used for the clock output. The input

crystal must be connected as close to the chip as possible. The input crystal should be a parallel mode,

pullable, AT cut, with 14 pF load capacitance. See previous page for crystal specifications. Consult ICS for

recommended suppliers. IMPORTANT - read application note MAN05 before laying out the PCB.

MDS 3721 B

3

Revision 082800

Integrated Circuit Systems, Inc. • 525 Race Street • San Jose •CA • 95126• (408)295-9800tel • www.icst.com

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