16

Integrated

Circuit

Systems, Inc.

ICS954321

1078B—09/20/05

Electrical Characteristics - USB48MHz

PARAMETER

SYMBOL

CONDITIONS*

MIN

TYP

MAX

UNITS

NOTES

Long Accuracy

ppm

see Tperiod min-max values

-100

100

ppm

1,2

Clock period

Tperiod

48.00MHz output nominal

20.8313

20.8354

ns

2

Output Impedance

RDSP

VO = VDD*(0.5)

12

55

Ω

1

Output High Voltage

VOH

IOH = -1 mA

2.4

V

1

Output Low Voltage

VOL

IOL = 1 mA

0.55

V

1

V OH = 1.0 V

-29

mA

1

VOH = 3.135 V

-23

mA

1

VOL = 1.95 V

29

mA

1

VOL = 0.4 V

27

mA

1

Edge Rate

tslewr/f

Rising/Falling edge rate

1

4

V/ns

1

Edge Rate

tslewr/f_USB

USB48 Rising/Falling edge rate

1

2

V/ns

1

Rise Time

tr_USB

VOL = 0.4 V, VOH = 2.4 V

12

ns

1

Fall Time

tf_USB

VOH = 2.4 V, VOL = 0.4 V

12

ns

1

Duty Cycle

dt1

VT = 1.5 V

45

55

%1

Group Skew

tskew

VT = 1.5 V

250

ps

1

Jitter, Cycle to cycle

tjcyc-cyc

VT = 1.5 V

500

ps

1

*TA = 0 - 70°C; Supply Voltage VDD = 3.3 V +/-5%, CL = 20 pF with Rs = 7Ω (Rs is used in USB48MHz test only)

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

Output High Current

IOH

Output Low Current

IOL

Electrical Characteristics - DOT_96MHz 0.7V Current Mode Differential Pair

PARAMETER

SYMBOL

CONDITIONS*

MIN

TYP

MAX

UNITS

Notes

Current Source Output Impedance

Zo

VO = Vx

3000

Ω

1

Voltage High

VHigh

660

850

mV

1,3

Voltage Low

VLow

-150

150

mV

1,3

Max Voltage

Vovs

1150

mV

1

Min Voltage

Vuds

-300

mV

1

Crossing Voltage (abs)

Vx(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

-100

100

ppm

1,2

Average period

Tperiod

96.00MHz nominal

10.4135

10.4198

ns

2

Absolute min period

Tabsmin

96.00MHz nominal

10.1635

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

VOL = 0.175V, VOH = 0.525V

125

ps

1

Fall Time Variation

d-tf

VOH = 0.525V VOL = 0.175V

125

ps

1

Duty Cycle

dt3

Measurement from differential

wavefrom

45

55

%

1

Jitter, Cycle to cycle

tjcyc-cyc

Measurement from differential

wavefrom

250

ps

1

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

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.

Measurement on single ended

signal using absolute value.

Statistical measurement on single

ended signal