DP83950B datasheet(67/80 Pages) NSC

67 / 80 page

90 AC and DC Specifications (Continued)

DC Specifications TA e 0 Cto a70 C VCC e 5V g5% unless otherwise specified (Continued)

Symbol

Description

Conditions

Min

Max

Units

PSEUDO AUI (PORTS 2 – 13)

VPOD

Differential Output

270X Termination and

450

1200

Voltage (TXg)1 kX Pulldowns

VPOB

Differential Output Voltage

270X Termination and

Typical 40 mV

Imbalance (TXg)1 kX Pulldowns

VPU

Undershoot Voltage (TXg)

270X Termination and

Typical 80 mV

1kX Pulldowns

VPDS

Differential Squelch

175

300

Threshold (RXg CDg)

VPCM

Differential Input Common Mode

Voltage (Rxg CDg) (Note 1)

TWISTED PAIR (PORTS 2 – 13)

VRON

Minimum Receive

Normal Mode

300

585

Squelch Threshold

Reduced Mode

(Note 2)

340

Note 1

This parameter is guaranteed by design and is not tested

Note 2

The operation in Reduced Mode is not guaranteed below 300 mV

AC Specifications

PORT ARBITRATION TIMING

TLF11096 – 22

Number

Symbol

Parameter

Min

Max

Units

ackilackol

ACKI Low to ACKO Low

ackihackoh

ACKI High to ACKO High

Note

Timing valid with no receive or collision activities

Note

In these diagrams the Inter-RIC and Management Busses are shown using active high signals active low signals may also be used See Section 55 Mode

Load Operation

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