16

Integrated

Circuit

Systems, Inc.

ICS951413

0929D—10/30/06

Electrical Characteristics - CPU 0.7V Current Mode Differential Pair

TA = 0 - 70°C; VDD = 3.3 V +/-5%; CL =2pF, RS=33.2Ω, RP=49.9Ω, ΙREF = 475Ω

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

NOTES

Current Source Output

Impedance

Zo

VO = Vx

3000

Ω

1

Voltage High

VHigh

660

850

1,3

Voltage Low

VLow

-150

150

1,3

Max VoltageVovs

1150

1

Min Voltage

Vuds

-300

1

Crossing Voltage (abs)

Vcross(abs)

250

550

mV

1

Crossing Voltage (var)

d-Vcross

Variation of crossing over all

edges

140

mV

1

Long Accuracy

ppmsee Tperiod min-max values

-300

300

ppm1,2

400MHz nominal

2.4993

2.5008

ns

2

400MHz spread

2.4993

2.5133

ns

2

333.33MHz nominal

2.9991

3.0009

ns

2

333.33MHz spread

2.9991

3.016

ns

2

266.66MHz nominal

3.7489

3.7511

ns

2

266.66MHz spread

3.7489

3.77

ns

2

200MHz nominal

4.9985

5.0015

ns

2

200MHz spread

4.9985

5.0266

ns

2

166.66MHz nominal

5.9982

6.0018

ns

2

166.66MHz spread

5.9982

6.0320

ns

2

133.33MHz nominal

7.4978

7.5023

ns

2

133.33MHz spread

7.4978

7.5400

ns

2

100.00MHz nominal

9.9970

10.0030

ns

2

100.00MHz spread

9.9970

10.0533

ns

2

400MHz nominal/spread

2.4143

ns

1,2

333.33MHz nominal/spread

2.9141

ns

1,2

266.66MHz nominal/spread

3.6639

ns

1,2

200MHz nominal/spread

4.8735

ns

1,2

166.66MHz nominal/spread

5.8732

ns

1,2

133.33MHz nominal/spread

7.3728

ns

1,2

100.00MHz nominal/spread

9.8720

ns

1,2

Rise Time

tr

VOL = 0.175V, VOH = 0.525V

175

700

ps

1

Fall Time

tf

VOH = 0.525V VOL = 0.175V

175

700

ps

1

Rise Time Variation

d-tr

125

ps

1

Fall Time Variation

d-tf

125

ps

1

Duty Cycle

dt3

Measurement from differential

wavefrom

45

55

%

1

Skew

tsk3

CPU(1:0), VT = 50%

100

ps

1

Skew

tsk4

CPU(1:0) to CPU2_ITP,

VT = 50%

150

ps

1

Jitter, Cycle to cycle

tjcyc-cyc

Measurement from differential

wavefrom (CPU2_ITP)

125

ps

1

Jitter, Cycle to cycle

tjcyc-cyc

Measurement from differential

wavefrom, (CPU(1:0))

85

ps

1

1Guaranteed by design and characterization, not 100% tested in production.

2 All Long Term Accuracy and Clock Period specifications are guaranteed assuming that REFOUT is at 14.31818MHz

3I

REF = VDD/(3xRR). For RR = 475Ω (1%), IREF = 2.32mA. IOH = 6 x IREF and VOH = 0.7V @ ZO=50Ω.

Tabsmin

Absolute min period

Statistical measurement on single

ended signal using oscilloscope

math function.

mV

Measurement on single ended

signal using absolute value.

mV

Average period

Tperiod