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www.pericom.com

PI6C49018

Rev. A

12/10/2014

PI6C49018

Low Power Networking Clock Generator

Electrical Characteristics - 100MHz Differential HCSL Outputs

Unless otherwise specified, V

Parameter

Symbol

Conditions

Min Typ Max Units

Output Frequency

100

MHz

Cycle-to-Cycle Jitter

T

CC/Jitter

150

ps

Peak-to-Peak Phase Jitter

T

Jø

PCIe Gen1 filter function

86

Spread Range

-0.5

0

%

Spread Rate

32

0

kHz

Duty Cycle

T

DC

45

50

55

%

Clock Stabilization from Power Up

3.5

ms

Rising Edge Rate

Note3, 4

0.6

4.0

V/ns

Falling Edge Rate

Note3, 4

0.6

4.0

V/ns

Rise-Fall Matching

Note3, 11

20%

Output Skew

T

OSKEW

V

old), Intra-pair skew

50

ps

V

old), Inter-pair skew

200

ps

Clock Source DC

Impedance(Zo)

Z

C-DC

17

Ω

High-Level Output

Voltage

V

OH

Note2 (Rs = 33ohm)

0.65

0.71

0.85

V

Low-Level Output Voltage

V

OL

-0.20

0

0.05

V

Absolute Crossing Point Voltage

V

CROSS

Note2, 5, 6

0.25

0.55

V

Variation of V

V

CROSS

Delta

Note2, 5, 8

140

mV

Average Clock Period Accuracy

T

PERIOD

AVG

Note3, 9, 10

-300

2800

ppm

Absolute Period (including jitter and spread spectrum)

T

PERIOD

ABS

Note3, 7

9.847

10.203

ns

NOTE:1.Measured at the end of an 8-inch trace with a 5pF load.

2.Measurement taken from a single-ended waveform.

3.Measurement taken from a differential waveform.

4.Measured from -150 mV to +150 mV on the differential waveform. The signal is monotonic through the measurement region for rise and fall time. The 300 mV

measurement window is centered on the differential zero crossing.

5.Measured at crossing point where the instantaneous voltage value of the rising edge of 100M+ equals the falling edge 100M-.

6.Refers to the total variation from the lowest crossing point to the highest, regardless of which edge is crossing. Refers to all crossing points for this measurement.

7.Defines as the absolute minimum or maximum period. This includes cycle-to-cycle jitter, relative PPM tolerance, and spread spectrum modulation.

8.Defined as the total variation of all crossing voltages of rising 100M+ and falling 100M-.

9.Refer to section 4.3.2.1 of the PCI Express Base Specification, Revision 1.1 for information regarding PPM considerations.

10.PPM refers to parts per million and is a DC absolute period accuracy specification. 1 PPM is 1/1,000,000th of 100 MHz exactly or100 Hz. For 300 PPM there is an

error budget of 100Hz/PPM * 300 PPM = 30 kHz. The period is measured with a frequency counter with measurement window set at 100 ms or greater. With spread

spectrum turned off the error is less than ±300 ppm. With spread spectrum turned on there is an additional +2500 PPM nominal shift in maximum period resulting

from the -0.5% down spread.

11.Matching applies to rising edge rate for PCIe and falling edge rate for PCIeN. It is measured using a ±75 mV window centered on the median cross point where

14-0209