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ICS840008AR-01

FEMTOCLOCKS™ CRYSTAL-TO-LVCMOS/LVTTL FREQUENCY SYNTHESIZER

Integrated Circuit Systems 

Integrated

Circuit

Systems, Inc.

PRELIMINARY

ICS840008-01

FEMTOCLOCKS™ CRYSTAL-TO-LVCMOS/LVTTL

FREQUENCY SYNTHESIZER

TABLE 3C. LVCMOS/LVTTL DC CHARACTERISTICS, TA = 0°C TO 70°C

Symbol Parameter

Test Conditions

Minimum Typical Maximum Units

VIH

Input High Voltage

OE, MR,

PLL_SEL

VDD = 3.3V ±10%

VDD = 2.5V ± 5%

2

1.7

VDD + 0.3

V

VDD + 0.3

V

VIL

Input Low Voltage

OE, MR,

PLL_SEL

VDD = 3.3V ±10%

-0.3

VDD = 2.5V ± 5%

-0.3

1.3

V

0.7

V

MR,

nPLL_SEL

IIH

Input High Current

OE

VDD = 3.3V ±10%

VDD = 2.5V ± 5%

VDD = 3.3V ±10%

VDD = 2.5V ± 5%

150

µA

150

µA

5

µA

5

µA

MR,

VDD = 3.3V ±10%

-5

µA

nPLL_SEL

IIL

Input Low Current

VDD = 2.5V ± 5%

V = 3.3V ±10%

-5

-150

µA

µA

OE

DD

VDD = 2.5V ± 5%

-150

µA

VDDO = 3.3V ± 10%

2.6

V

VOH

Output High Voltage; NOTE 1

VDDO = 2.5V ± 5%

1.8

V

VDDO = 1.8V ± 5%

1.5

V

V

Output Low Voltage: NOTE 1

OL

V = 3.3V±10% or 2.5V±5%

DDO

0.5

V

VDDO = 1.8V ± 5%

0.4

V

NOTE 1: Outputs terminated with 50Ω to VDDO/2. See Parameter Measurement section, "Load Test Circuit" diagrams.

TABLE 4. CRYSTAL CHARACTERISTICS

Parameter

Test Conditions

Mode of Oscillation

Frequency

Equivalent Series Resistance (ESR)

Shunt Capacitance

NOTE: Characterized using an 18pF parallel resonant crystal.

Minimum Typical Maximum

Fundamental

25

32

50

7

Units

MHz

MHz

Ω

pF

840001AR-01

www.icst.com/products/hiperclocks.html

4

REV. A APRIL 7, 2005

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