W149H 데이터 시트보기 (PDF) - SpectraLinear Inc

부품명

상세내역

일치하는 목록

W149H

440BX AGPset Spread Spectrum Frequency Synthesizer

SpectraLinear Inc 

W149

48-MHz Clock Output (Lump Capacitance Test Load = 20 pF= 66.6/100 MHz

Parameter

Description

Test Condition/Comments

f

Frequency, Actual

Determined by PLL divider ratio (see m/n below)

fD

Deviation from 48

(48.008 – 48)/48

MHz

m/n

PLL Ratio

(14.31818 MHz x 57/17 = 48.008 MHz)

tR

Output Rise Edge

Measured from 0.4V to 2.4V

Rate

tF

Output Fall Edge Rate Measured from 2.4V to 0.4V

tD

Duty Cycle

Measured on rising and falling edge at 1.5V

fST

Frequency Stabili-

Assumes full supply voltage reached within 1 ms from

zation from Power-up power-up. Short cycles exist prior to frequency stabili-

(cold start)

zation.

Zo

AC Output Impedance Average value during switching transition. Used for

determining series termination value.

CPU = 66.6/100 MHz

Min. Typ. Max.

48.008

+167

57/17

0.5

2

0.5

2

45

55

3

40

Unit

MHz

ppm

V/ns

V/ns

%

ms

:

24-MHz Clock Output (Lump Capacitance Test Load = 20 pF= 66.6/100 MHz

Parameter

Description

Test Condition/Comments

f

Frequency, Actual

Determined by PLL divider ratio (see m/n below)

fD

Deviation from 24 MHz (24.004 – 24)/24

m/n

PLL Ratio

(14.31818 MHz x 57/34 = 24.004 MHz)

tR

Output Rise Edge Rate Measured from 0.4V to 2.4V

tF

Output Fall Edge Rate Measured from 2.4V to 0.4V

tD

Duty Cycle

Measured on rising and falling edge at 1.5V

fST

Frequency Stabili-

Assumes full supply voltage reached within 1 ms from

zation from Power-up power-up. Short cycles exist prior to frequency stabili-

(cold start)

zation.

Zo

AC Output Impedance Average value during switching transition. Used for

determining series termination value.

CPU = 66.6/100 MHz

Min. Typ. Max.

24.004

+167

57/34

0.5

2

0.5

2

45

55

3

40

Unit

MHz

ppm

V/ns

V/ns

%

ms

:

Rev 1.0, November 21, 2006

Page 14 of 15

Share Link: