8

Integrated

Circuit

Systems, Inc.

ICS954309

1044A—02/20/07

Electrical Characteristics - CPU 0.7V Current Mode Differential Pair

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

Ω, R

P=49.9

Ω, Ι

REF

= 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 Voltage

Vovs

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

ppm

see Tperiod min-max values

-300

300

ppm

1,2

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

3.0160

ns

2

266.66MHz nominal

3.7489

3.7511

ns

2

266.66MHz spread

3.7489

3.7700

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

2.4993

2.5008

ns

1,2

400MHz spread

2.4993

2.5133

ns

1,2

333.33MHz nominal

2.9991

3.0009

ns

1,2

333.33MHz spread

2.9991

3.0160

ns

1,2

266.66MHz nominal

3.7489

3.7511

ns

1,2

266.66MHz spread

3.7489

3.7700

ns

1,2

200MHz nominal

4.9985

5.0015

ns

1,2

200MHz spread

4.9985

5.0266

ns

1,2

166.66MHz nominal

5.9982

6.0018

ns

1,2

166.66MHz spread

5.9982

6.0320

ns

1,2

133.33MHz nominal

7.4978

7.5023

ns

1,2

133.33MHz spread

7.4978

7.5400

ns

1,2

100.00MHz nominal

9.9970

10.0030

ns

1,2

100.00MHz spread

9.9970

10.0533

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

tsk3

CPU(1:0), VT = 50%

100

ps

1

tsk4

CPU(1:0) to CPU2_ITP,

VT = 50%

150

ps

1

tjcyc-cycITP

Measurement from differential

wavefrom (CPU2_ITP)

125

ps

1

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 = 475

Ω (1%), I

REF = 2.32mA. IOH = 6 x IREF and VOH = 0.7V @ ZO=50

Ω.

Jitter, Cycle to cycle

Skew

Tabs

Absolute min/max period

Average period

Tperiod

Statistical measurement on single

ended signal using oscilloscope

math function.

mV

Measurement on single ended

signal using absolute value.

mV