CDC924

133-MHz CLOCK SYNTHESIZER/DRIVER FOR PC MOTHERBOARDS

WITH 3-STATE OUTPUTS

SCAS607A – NOVEMBER 1998 – REVISED MAY 1999

9

POST OFFICE BOX 655303

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

otherwise noted) (continued)

PCIx, PCI_F, 3V66x (Type 5)

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 = –18 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 = 12 mA

0.15

0.4

V

VDD = 3.135 V,

VO = 1 V

–33

–53

IOH

High-level output current

VDD = 3.3 V,

VO = 1.65 V

–53

mA

VDD = 3.465 V,

VO = 3.135 V

–16

–33

VDD = 3.135 V,

VO = 1.95 V

30

67

IOL

Low-level output current

VDD = 3.3 V,

VO = 1.65 V

70

mA

VDD = 3.465 V,

VO = 0.4 V

27

49

CO

Output capacitance

VDD = 3.3 V,

VO = VDD or GND

4.5

7.5

pF

ZO

Output impedance

High state

VO = 0.5 VDD,

VO/IOH

12

31

55

Ω

ZO

Output impedance

Low state

VO = 0.5 VDD,

VO/IOL

12

24

55

Ω

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

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Overshoot/undershoot

GND – 0.7 V

VDD + 0.7 V

V

Ring back

VIL – 0.1 V

VIH + 0.1 V

V

Stabilization time, PWR_DWN to PCIx

f(CPU) = 133 MHz

0.05

3

ms

tdis3

Disable time, PWR_DWN to PCIx

f(CPU) = 133 MHz

50

ns

Stabilization time, PWR_DWN to CPUx

f(CPU) = 133 MHz

0.03

3

ms

tdis4

Disable time, PWR_DWN to CPUx

f(CPU) = 133 MHz

50

ns

Stabilization time†

After SEL1, SEL0

3

ms

Stabilization time†

After power up

3

ms

† Stabilization time is the time required for the integrated PLL circuit to obtain phase lock of its feedback signal to its reference signal. In order for

phase lock to be obtained, a fixed-frequency, fixed-phase reference signal must be present at XIN. Until phase lock is obtained, the specifications

for propagation delay and skew parameters given in the switching characteristics tables are not applicable. Stabilization time is defined as the

time from when VDD achieves its nominal operating level until the output frequency is stable and operating within specification.