W161H 查看數據表（PDF） - Cypress Semiconductor

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W161H

133-MHz Spread Spectrum FTG for Pentium® II Platforms

Cypress Semiconductor 

PRELIMINARY

W161

IOAPIC Clock Output, IOAPIC (Lump Capacitance Test Load = 20 pF)

Parameter

Description

Test Condition/Comments

Min

f

Frequency

Note 11

tR

Output Rise Edge Rate Measured from 0.4V to 2.0V

1

tF

Output Fall Edge Rate

Measured from 2.0V to 0.4V

1

tD

Duty Cycle

Measured on rising and falling edge at 1.25V

45

fST

Frequency Stabilization Assumes full supply voltage reached within

from Power-up (cold start) 1 ms from power-up. Short cycles exist prior to

frequency stabilization.

Zo

AC Output Impedance

Average value during switching transition. Used

for determining series termination value.

Note:

11. IOAPIC clock is CPU/8 for CPU = 133 MHz and CPU/6 for CPU = 100 MHz.

Typ

16.67

20

Max

4

4

55

3

Unit

MHz

V/ns

V/ns

%

ms

Ω

Ordering Information

Ordering Code

Package

Name

W161

H

Document #: 38-00817

Package Type

48-pin SSOP (300 mils)

8

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