CDC921

133-MHz CLOCK SYNTHESIZER/DRIVER FOR PC MOTHERBOARDS

WITH 3-STATE OUTPUTS

SCAS623 –MAY 27, 1999

8

POST OFFICE BOX 655303

electrical characteristics over recommended operating free-air temperature range (unless

otherwise noted) (continued)

CPUx, CPU_DIV2, APIC (Type 1)

PARAMETER

TEST CONDITIONS

MIN

TYP†

MAX

UNIT

VOH

High-level output voltage

VDD = min to max,

IOH = – 1 mA

VDD –

0.1 V

V

OH

gg

VDD = 2.375 V,

IOH = –12 mA

2

VOL

Low level output voltage

VDD = min to max,

IOL = 1 mA

0.1

V

VOL

Low-level output voltage

VDD = 2.375 V,

IOL = 12 mA

0.18

0.4

V

VDD = 2.375 V,

VO = 1 V

–26

–42

IOH

High-level output current

VDD = 2.5 V,

VO = 1.25 V

–46

mA

VDD = 2.625 V,

VO = 2.375 V

–16

–27

VDD = 2.375 V,

VO = 1.2 V

27

57

IOL

Low-level output current

VDD = 2.5 V,

VO = 1.25 V

63

mA

VDD = 2.625 V,

VO = 0.3 V

23

43

CO

Output capacitance

VDD = 3.3 V,

VO = VDD or GND

5.8

8.5

pF

ZO

Output impedance

High state

VO = 0.5 VDD,

VO/IOH

13.5

27

45

Ω

ZO

Output impedance

Low state

VO = 0.5 VDD,

VO/IOL

13.5

20

45

Ω

† All typical values are measured at their respective nominal VDD values.

48MHz, REFx (Type 3)

PARAMETER

TEST CONDITIONS

MIN

TYP†

MAX

UNIT

VOH

High-level output voltage

VDD = min to max,

IOH = – 1 mA

VDD –

0.1 V

V

OH

gg

VDD = 3.135 V,

IOH = –14 mA

2.4

VOL

Low level output voltage

VDD = min to max,

IOL = 1 mA

0.1

V

VOL

Low-level output voltage

VDD = 3.135 V,

IOL = 9 mA

0.18

0.4

V

VDD = 3.135 V,

VO = 1 V

–27

–41

IOH

High-level output current

VDD = 3.3 V,

VO = 1.65 V

–41

mA

VDD = 3.465 V,

VO = 3.135 V

–12

–23

VDD = 3.135 V,

VO = 1.95 V

29

50

IOL

Low-level output current

VDD = 3.3 V,

VO = 1.65 V

53

mA

VDD = 3.465 V,

VO = 0.4 V

20

37

CO

Output capacitance

VDD = 3.3 V,

VO = VDD or GND

4.5

7

pF

ZO

Output impedance

High state

VO = 0.5 VDD,

VO/IOH

20

40

60

Ω

ZO

Output impedance

Low state

VO = 0.5 VDD,

VO/IOL

20

31

60

Ω

† All typical values are measured at their respective nominal VDD values.