ICS9UMS9633B datasheet(10/22 Pages) IDT

10 / 22 page

IDTTM/ICSTM Ultra Mobile PC/Mobile Internet Device

1423—01/20/09

ICS9UMS9633B

ULTRA MOBILE PC/MOBILE INTERNET DEVICE

Advance Information

Electrical Characteristics - SMBus Interface

PARAMETER

SYMBOL

CONDITIONS

MIN

MAX

UNITS

Notes

SMBus Voltage

2.7

3.3

Low-level Output Voltage

OLSMB

@ I

PULLUP

0.4

Current sinking at

OLSMB = 0.4 V

PULLUP

SMB Data Pin

SCLK/SDATA

Clock/Data Rise Time

RI2C

(Max VIL - 0.15) to

(Min VIH + 0.15)

1000

SCLK/SDATA

Clock/Data Fall Time

FI2C

(Min VIH + 0.15) to

(Max VIL - 0.15)

300

Maximum SMBus Operating

Frequency

SMBUS

Block Mode

100

kHz

Notes on Electrical Characteristics:

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

2 Slew rate measured through Vswing centered around differential zero

3 Vxabs is defined as the voltage where CLK = CLK#

4 Only applies to the differential rising edge (CLK rising and CLK# falling)

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

7 Operation under these conditions is neither implied, nor guaranteed.

9 See PCI Clock-to-Clock Delay Figure

8 Maximum input voltage is not to exceed maximum VDD

5 Defined as the total variation of all crossing voltages of CLK rising and CLK# falling. Matching applies to rising edge rate of

CLK and falling edge of CLK#. It is measured using a +/-75mV window centered on the average cross point where CLK meets

CLK#. The average cross point is used to calculate the voltage thresholds the oscilloscope is to use for the edge rate

calculations.

Clock Periods Differential Outputs with Spread Spectrum Enabled

1 Clock

1us

0.1s

1us

1 Clock

Lg-

-SSC

-ppm error

0ppm

+ ppm error

+SSC

Lg+

Absolute

Period

Short-term

Average

Long-Term

Average

Period

Long-Term

Average

Short-term

Average

Period

Minimum

Absolute

Period

Minimum

Absolute

Period

Minimum

Absolute

Period

Nominal

Maximum

SRC 100

9.87400

9.99900

10.00000

10.00100

10.05130

10.17630

1,2

CPU 100

9.91400

9.99900

10.00000

10.00100

10.05130

10.13630

1,2

CPU 133

7.41425

7.49925

7.50000

7.50075

7.53845

7.62345

1,2

CPU 166

5.91440

5.99940

6.00000

6.00060

6.03076

6.11576

1,2

Clock Periods Differential Outputs with Spread Spectrum Disabled

1 Clock

1us

0.1s

1us

1 Clock

Lg-

-SSC

-ppm error

0ppm

+ ppm error

+SSC

Lg+

Absolute

Period

Short-term

Average

Long-Term

Average

Period

Long-Term

Average

Short-term

Average

Period

Minimum

Absolute

Period

Minimum

Absolute

Period

Minimum

Absolute

Period

Nominal

Maximum

SRC 100

9.87400

9.99900

10.00000

10.00100

10.17630

1,2

CPU 100

9.91400

9.99900

10.00000

10.00100

10.13630

1,2

CPU 133

7.41425

7.49925

7.50000

7.50075

7.62345

1,2

CPU 166

5.91440

5.99940

6.00000

6.00060

6.11576

1,2

DOT 96

10.16560

10.41560

10.41670

10.41770

10.66770

1,2

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

Measurement Window

Units

Notes

Symbol

Definition

Notes

Symbol

Definition

Measurement Window

Units

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