MK2727

Low Cost 27 MHz VCXO

MDS 2727 B

3

Revision 111600

Printed 11/16/00

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

Parameter

Conditions

Minimum

Typical

Maximum

Units

ABSOLUTE MAXIMUM RATINGS (note 1)

ABSOLUTE MAXIMUM RATINGS (note 1)

Supply voltage, VDD

Referenced to GND

7

V

Inputs and Clock Outputs

Referenced to GND

-0.5

VDD+0.5

V

Ambient Operating Temperature

0

70

°C

Soldering Temperature

Max of 10 seconds

260

°C

Storage temperature

-65

150

°C

DC CHARACTERISTICS (VDD = 5.0V unless noted)

DC CHARACTERISTICS (VDD = 5.0V unless noted)

Operating Voltage, VDD

4.75

5.25

V

Output High Voltage, VOH

IOH=-25mA

2.4

V

Output Low Voltage, VOL

IOL=25mA

0.4

V

Output High Voltage, VOH, CMOS level

IOH=-8mA

VDD-0.4

V

Operating Supply Current, IDD

No Load

20

mA

Short Circuit Current

±100

mA

VIN, VCXO control voltage

0

3

V

AC CHARACTERISTICS (VDD = 5.0V unless noted)

AC CHARACTERISTICS (VDD = 5.0V unless noted)

Input Crystal Frequency

13.50000

MHz

Input Crystal Accuracy

±30

ppm

Output Clock Rise Time

0.8 to 2.0V

1.5

ns

Output Clock Fall Time

2.0 to 0.8V

1.5

ns

Output Clock Duty Cycle

At 1.4V

40

50

60

%

Maximum Absolute Jitter, short term

200

ps

27 MHz output pullability, note 2

0V

≤ VIN ≤ 3V

±100

ppm

Electrical Specifications

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 MicroClock approved pullable crystal.

External Components

The MK2727 requires a minimum number of external components for proper operation. A decoupling

capacitor of 0.1µF should be connected between VDD and GND on pins 2 and 4, as close to the MK2727

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,

13.5MHz, with 14pF load capacitance. Consult MicroClock for recommended suppliers. IMPORTANT -

read application note MAN05 before laying out the PCB.