ICS844002I-01

FEMTOCLOCKS™ CRYSTAL-TO-LVDS FREQUENCY SYNTHESIZER

IDT™ / ICS™ LVDS FREQUENCY SYNTHESIZER

4

ICS844002AGI-01 REV. C SEPTEMBER 28, 2007

Table 4. Crystal Characteristics

AC Electrical Characteristics

NOTE 2: This parameter is defined in accordance with JEDEC Standard 65.

NOTE 3: Please refer to the Phase Noise Plot.

Symbol

Parameter

Test Conditions

Minimum

Typical

Maximum

Units

Differential Output Voltage

240

550

mV

∆V

OD

40

mV

Offset Voltage

0.7

1.1

1.5

V

∆V

OS

50

mV

Parameter

Test Conditions

Minimum

Typical

Maximum

Units

Mode of Oscillation

Fundamental

Frequency

22.4

25

27.2

MHz

Equivalent Series Resistance (ESR)

50

Ω

Shunt Capacitance

7pF

Drive Level

1mW

Parameter

Symbol

Test Conditions

Minimum

Typical

Maximum

Units

Output Frequency

FSEL[1:0] = 00

140

170

MHz

FSEL[1:0] = 01

112

136

MHz

FSEL[1:0] = 10

56

68

MHz

tsk(o)

Output Skew; NOTE 1, 2

5

20

ps

tjit(Ø)

RMS Phase Jitter, (Random);

NOTE 3

156.25MHz, (1.875MHz – 20MHz)

0.41

ps

125MHz, (1.875MHz – 20MHz)

0.44

ps

62.5MHz, (1.875MHz – 20MHz)

0.47

ps

Output Rise/Fall Time

20% to 80%

250

550

ps

odc

Output Duty Cycle

48

52

%