Networking Silicon — 82541(PI/GI/EI)

25

4.4

AC Characteristics

IOH

Output high

current:

0

3.6V

mA

0

1.2V

1.2V

1.9V

1.9V

3.6V

VOH

Output high

voltage:

V

3.3 V PCI

IOH = -500 mA

0.9 * VDD (3.3)

VOL

Output low

voltage:

V

3.3 V PCI

IOL = 1500 mA

0.1 * VDD (3.3)

IOZ

Off-state output

leakage current

VO = VDD or VSS

-10

10

µA

IOS

Output short

circuit current

-250

CIN

Input

Input and bi-

directional buffers

8pF

a. This is only applicable to the 82541PI. The maximum VIL is 0.6 V for the following pins: A13, C5, C8, J4, L7, L13, L12, M8, M12,

M13, N10, N11, N13, N14, P9, and P13.

b. This is only applicable to the 82541PI.

c.

Table 12. AC Characteristics: 3.3 V Interfacing

Symbol

Parameter

Min

Typ

Max

Unit

CLK

Clock frequency in PCI mode

66

MHz

Table 13. 25 MHz Clock Input Requirements

Symbol

Parameter

Specifications

Units

Min

Typ

Max

f0

Frequency

25

MHz

df0

Frequency variation

-50

+30

ppm

Dc

Duty cycle

40

60

%

tr

Rise time

5

ns

tf

Fall time

5

ns

Jptp

250

ps

Table 11. I/O Characteristics (Sheet 2 of 2) (Continued)

Symbol

Parameter

Condition

Min

Typ

Max

Units