ICS9148-25 datasheet(9/13 Pages) ICST

Part #	ICS9148-25

Description	Pentium/Pro System and Cyrix Clock Chip

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Manufacturer	ICST [Integrated Circuit Systems]

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9

ICS9148-25

Electrical Characteristics - CPU

TA = 0 - 70C; VDD = 3.3 V +/-5%, VDDL = 2.5 V +/-5%; CL = 10 - 20 pF (unless otherwise stated)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX UNITS

Output Impedance

RDSP2B

1

VO = VDD*(0.5)

10

25

Ω

Output Impedance

RDSN2B

1

VO = VDD*(0.5)

10

25

Ω

Output High Voltage

VOH2B

IOH = -13.0 mA

2

2.2

V

Output Low Voltage

VOL2B

IOL = 14 mA

0.3

0.4

V

Output High Current

IOH2B

VOH = 1.7 V

-25

-16

mA

Output Low Current

IOL2B

VOL = 0.7 V

22

26

mA

Rise Time

tr2B

1

VOL = 0.4 V, VOH = 2.0 V

1.35

1.6

ns

Fall Time

tf2B

1

VOH = 2.0 V, VOL = 0.4 V

1.2

1.6

ns

Duty Cycle

dt2B

1

VT = 1.25 V

45

50

55

ns

Skew

tsk2B

1

VT = 1.25 V

60

250

ps

tjcyc-cyc2B

1

VT = 1.25 V

150

250

ps

Jitter

tj1s2B

1

VT = 1.25 V

30

150

ps

tjabs2B

1

VT = 1.25 V

-250

80

+250

ps

1

Guarenteed by design, not 100% tested in production.

Electrical Characteristics - PCI

TA = 0 - 70C; VDD = VDDL = 3.3 V +/-5%; CL = 30 pF (unless otherwise stated)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX UNITS

Output Impedance

RDSP1

1

VO = VDD*(0.5)

12

55

Ω

Output Impedance

RDSN1

1

VO = VDD*(0.5)

12

55

Ω

Output High Voltage

VOH1

IOH = -11 mA

2.6

3.1

V

Output Low Voltage

VOL1

IOL = 9.4 mA

0.15

0.4

V

Output High Current

IOH1

VOH = 2.0 V

-62

-40

mA

Output Low Current

IOL1

VOL = 0.8 V

40

55

mA

Rise Time

tr1

1

VOL = 0.4 V, VOH = 2.4 V

1.5

2

ns

Fall Time

tf1

1

VOH = 2.4 V, VOL = 0.4 V

1.4

2

ns

Duty Cycle

dt1

1

VT = 1.5 V

455060%

Skew

tsk1

1

VT = 1.5 V

200

500

ps

Jitter

tj1s1

1

VT = 1.5 V

10

150

ps

tjabs1

1

VT = 1.5 V

-250

65

250

ps

1Guarenteed by design, not 100% tested in production.

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