DM9008 查看數據表（PDF） - Davicom Semiconductor, Inc.

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DM9008

ISA/Plug & Play Super Ethernet Contoller

Davicom Semiconductor, Inc. 

DC Electrical Characteristics (continued)

DM9008

ISA/Plug & Play Super Ethernet Contoller

Symbol

Parameter

Min.

Max.

Unit

Conditions

VDS

Differential Squelch Threshold (RX±

-175

-300

mV

and CD±)

(Note 5)

VCM

Differential Input Common Mode

Voltage (RX± and CD±) (Note 5)

0

5.5

V

Twisted Pair Interface Pins (TPTX+/TPTX-)

Vtidf

TP input voltage

.350

2.0

V

-

LI:

Vil

low

Vih

high

-

0.8

V

-

2.4

-

V

-

Note 1: These levels are tested dynamically using a limited number of functional test patterns. Refer to AC Test Load.

Note 2: The low drive CMOS compatible Voh and Vol limits are not tested directly. Detailed device characterization verifies

that this specification can be guaranteed by testing the high drive TTL compatible Vol and Voh specifications.

Note 3: This measurement is made while the DM9008 is undergoing transmission, reception, and collision. The value is

not measured instantaneously, but is averaged over a span of several milliseconds.

Note 4: This measurement is made while the DM9008 is sitting idle of transmission. This measurement is described in note

1.

Note 5: This parameter is guaranteed by design and is not tested.

Note 6: Except RST, IORB, IOWB which are Schmitt trigger with Vil = 1.0V, Vih = 2.8V.

4

Final

Version: DM9008-DS-F02

November 30, 2000

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