CDC950

133MHz DIFFERENTIAL CLOCK SYNTHESIZER/DRIVER FOR

PC MOTHERBOARDS/SERVERS

SCAS646B − FEBRUARY 2001 − REVISED OCTOBER 2003

7

POST OFFICE BOX 655303

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

otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP†

MAX

UNIT

VIK

Input clamp voltage

VDD = 3.135 V,

II = –18 mA

−1.2

V

IIH

High-level input

current

All inputs except

SelA, SelB

VDD = 3.465 V,

VI = VDD

5

µA

IIL

Low-level input

current

All inputs except

SelA, SelB

VDD = 3.465 V,

VI = GND

−5

µA

IOZ

High-impedance

-state output

current

All outputs including

SelA, SelB

VDD = 3.465 V

3V48/SelA, 3V48/SelB = H,

SEL100/133 = L,

VO = VDD or GND,

PWRDWN = H

±10

µA

IDD(Z)

High-impedance-state supply current‡

VDD = 3.465 V

3V48/SelA, 3V48/SelB = H,

SEL100/133 = L,

PWRDWN = H

19

25

mA

IDD(PD)

SelA, SelB = L

R(ref) = 475 Ω

VDD Supply

43

47

mA

AIDD(PD)

PWRDWN state supply current‡

R(ref) = 475 Ω

PWRDWN = L

AVDD Supply

3.4

4.2

mA

IDD(D)

Dynamic supply current‡

VDD = 3.465 V,

Rref = 475 Ω

PWRDWN = H

SSC = ON/OFF

100 MHz

173

190

mA

IDD(D)

Dynamic supply current‡

DD

Rref = 475 Ω,

IO = 6 x Iref

SSC = ON/OFF

CL = MAX

133 MHz

183

200

mA

100 MHz and SSC off

19

24

AlDD

Analog power supply current

VDD = 3.465 V

133 MHz and SSC off

26

33

mA

AlDD

Analog power supply current

VDD = 3.465 V

100 MHz and SSC on

26

33

mA

133 MHz and SSC on

35

45

CI

Input capacitance§

VDD = 3.3 V,

VI = VDD or GND

2

5

pF

C(XTAL)

Crystal load capacitanceW

Effective capacity between CIN and COUT

13.5

22.5

pF

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

‡ CL = MAX = 5 pF, RS = 33.2 Ω, Rp = 49.9 Ω at HCLK/HCLK (Type X1)

CL = MAX = 20 pF, RL = 500 Ω at 48 MHz, REF (Type 3)

CL = MAX = 30 pF, RL = 500 Ω at CLK33 (Type 5)

§ These parameters are assured by design and lab characterization, not 100% production tested.

¶ This is the corresponding capacitive load for the XTAL in this oscillator application (Pierce oscillator)