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ICS844256

FEMTOCLOCKS™ CRYSTAL-TO-LVDS FREQUENCY SYNTHESIZER W/INTEGRATED FANOUT BUFFER

Integrated Device Technology 

ICS844256

FEMTOCLOCKS™ CRYSTAL-TO-LVDS FREQUENCY SYNTHESIZER W/INTEGRATED FANOUT BUFFER PRELIMINARY

TABLE 6A. AC CHARACTERISTICS, VDD = VDDO = 3.3V±5%, TA = 0°C TO 70°C

Symbol Parameter

Test Conditions

Minimum Typical

FOUT

tjit(Ø)

tsk(o)

Output Frequency

RMS Phase Jitter (Random)

Output Skew; NOTE 1, 2

125MHz, Integration Range:

1.875MHz - 20MHz

53.125

0.48

TBD

tR / tF

Output Rise/Fall Time

20% to 80%

375

odc

Output Duty Cycle

50

tLOCK

PLL Lock Time

See Parameter Measurement Information section.

NOTE 1: Defined as skew between outputs at the same supply voltage and with equal load conditions.

Measured at the output differential crossing points.

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

Maximum

333.33

1

Units

MHz

ps

ps

ps

%

ms

TABLE 6B. AC CHARACTERISTICS, VDD = 3.3V±5%, VDDO = 2.5V±5%, TA = 0°C TO 70°C

Symbol Parameter

Test Conditions

Minimum Typical

FOUT

tjit(Ø)

tsk(o)

Output Frequency

RMS Phase Jitter (Random)

Output Skew; NOTE 1, 2

125MHz, Integration Range:

1.875MHz - 20MHz

53.125

0.44

TBD

tR / tF

Output Rise/Fall Time

20% to 80%

400

odc

Output Duty Cycle

50

tLOCK

PLL Lock Time

See Parameter Measurement Information section.

NOTE 1: Defined as skew between outputs at the same supply voltage and with equal load conditions.

Measured at the output differential crossing points.

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

Maximum

333.33

1

Units

MHz

ps

ps

ps

%

ms

IDT™ / ICS™ LVDS FREQUENCY SYNTHESIZER W/FANOUT BUFFER 6

ICS844256BG REV. B NOVEMBER 19, 2007

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