CDC950

133MHz DIFFERENTIAL CLOCK SYNTHESIZER/DRIVER FOR

PC MOTHERBOARDS/SERVERS

SCAS646B − FEBRUARY 2001 − REVISED OCTOBER 2003

8

POST OFFICE BOX 655303

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

otherwise noted) (continued)

HCLK/HCLK (Type X1)

PARAMETER

TEST CONDITIONS

MIN

TYP†

MAX

UNIT

ro

Output resistance

3000

Ω

VO

Output voltage

1.2

V

IO

Output current

VDD = 3.30 V nom

All combinations of Table 5, See Note 5

−7%

l(NOM)

7%

l(NOM)

mA

IO

Output current

VDD = 3.30 V, ±5%

All combinations of Table 5, See Note 5

−12%

l(NOM)

12%

l(NOM)

mA

CO

Output capacitance

VDD = 3.30 V nom

VO = VDD GND

3.5

pF

NOTE 5: I(NOM) is output current (IOH) of table 5.

3V48, 3V48REFCLK (Type 3)

PARAMETER

TEST CONDITIONS

MIN

TYP†

MAX

UNIT

VOH

High-level output voltage

VDD = min to max,

IOH = –1 mA

VDD – 0.1

VOH

High-level output voltage

VDD = 3.135 V,

IOH = −14 mA

2.4

V

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

VDD = 3.135 V,

VO = 1 V

−29

IOH

High-level output current

VDD = 3.3 V,

VO = 1.65 V

−37

IOH

High-level output current

VDD = 3.465 V,

VO = 3.135 V

−11

−23

mA

VDD = 3.135 V,

VO = 1.95 V

29

mA

IOL

Low-level output current

VDD = 3.3 V,

VO = 1.65 V

39

IOL

Low-level output current

VDD = 3.465 V,

VO = 0.4 V

16

27

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

40

60

Ω

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