8

ICS954201

0819H—02/17/06

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

727

850

1,3

Voltage Low

VLow

-150

-2

150

1,3

Max Voltage

Vovs

752

1150

1

Min Voltage

Vuds

-300

-21

1

Crossing Voltage (abs)

Vcross

(abs)

250

348

550

mV

1

Crossing Voltage (var)

d-Vcross

Variation of crossing over all

edges

39

140

mV

1

Long Accuracy

ppm

see Tperiod min-max values

-300

300

ppm1,2

400MHz non-spread

2.4993

2.4999

2.5008

ns

2

400MHz spread

2.4993

2.5133

ns

2

333.33MHz non-spread

2.9991

3.0000

3.0009

ns

2

333.33MHz spread

2.9991

3.016

ns

2

266.66MHz non-spread

3.7489

3.7509

3.7511

ns

2

266.66MHz spread

3.7489

3.77

ns

2

200MHz non-spread

4.9985

4.9998

5.0015

ns

2

200MHz spread

4.9985

5.0266

ns

2

166.66MHz non-spread

5.9982

6.0000

6.0018

ns

2

166.66MHz spread

5.9982

6.0320

ns

2

133.33MHz non-spread

7.4978

7.5017

7.5023

ns

2

133.33MHz spread

7.4978

5.4000

ns

2

100.00MHz non-spread

9.9970

10.0000

10.0030

ns

2

100.00MHz spread

9.9970

10.0533

ns

2

400MHz non-spread

2.4970

2.5750

ns

1,2

400MHz spread

2.5983

ns

1,2

333.33MHz non-spread

2.9940

3.0859

ns

1,2

333.33MHz spread

3.1010

ns

1,2

266.66MHz non-spread

3.7430

3.8361

ns

1,2

266.66MHz spread

3.8550

ns

1,2

200MHz non-spread

4.9940

5.0865

ns

1,2

200MHz spread

5.1116

ns

1,2

166.66MHz non-spread

5.9950

6.0868

ns

1,2

166.66MHz spread

6.1170

ns

1,2

133.33MHz non-spread

7.4970

7.5873

ns

1,2

133.33MHz spread

7.6250

ns

1,2

100.00MHz non-spread

10.0000

10.0880

ns

1,2

100.00MHz spread

10.1383

ns

1,2

Rise Time

tr

VOL = 0.175V, VOH = 0.525V

175

230

700

ps

1

Fall Time

tf

VOH = 0.525V VOL = 0.175V

175

206

700

ps

1

Rise Time Variation

d-tr

15

125

ps

1

Fall Time Variation

d-tf

14

125

ps

1

Duty Cycle

dt3

Measurement from differential

wavefrom

45

51

55

%

1

CPU(1:0), VT = 50%

7.5

100

ps

1

CPU2_ITP, VT = 50%

145

150

ps

1

Jitter, Cycle to cycle

tjcyc-cyc

Differential waveform

measurement, CPU(1:0)

36

85

ps

1

Jitter, Cycle to cycle

tjcyc-cyc

Differential waveform

measurement, CPU2_ITP

96

125

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.

2.4143

2.9141

Average period

Tperiod

Absolute min/max period

Tabs

9.9120

Statistical measurement on single

ended signal using oscilloscope

math function.

mV

Measurement on single ended

signal using absolute value.

mV

Skew

tsk3

3.6639

4.9135

5.9132

7.4128