AM79761 datasheet(14/20 Pages) AMD

Il numero della parte	AM79761

Spiegazioni elettronici	Physical Layer 10-Bit Transceiver for Gigabit Ethernet (GigaPHY??SD)

PDF	20 Pages

Scroll/Zoom	100%

Produttore elettronici	AMD [Advanced Micro Devices]

Homepage	http://www.amd.com

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14 / 20 page

Am79761

PRELIMINARY

KEY TO SWITCHING WAVEFORMS

AC CHARACTERISTICS

Figure 21.

Transmit Timing Waveforms

Table 21.

Transmit AC Characteristics

Must be

Steady

May

Change

from H to L

May

Change

from L to H

Does Not

Apply

Don’t Care,

Any Change

Permitted

Will be

Steady

Will be

Changing

from H to L

Will be

Changing

from L to H

Changing,

State

Unknown

Center

Line is High-

Impedance

“Off” State

WAVEFORM

INPUTS

OUTPUTS

KS000010-PAL

Symbol

Parameter Description

Test Conditions

Min

Max

Unit

TXD[0:9] Setup time to the rising

edge of REFCLK

Measured between the valid data

level of TXD[0:9] to the 1.4 V point of

REFCLK

1.5

—

TXD[0:9] hold time after the rising

edge of REFCLK

1.0

—

TSDR,TSDF

± rise and fall time

20% to 80%, 75

Ω load to V

SS, Tested

on a sample basis

—

300

TLAT

Latency from rising edge of

REFCLK to TXD0 appearing on

±-

bc = Bit clocks

ns = Nano second

11bc - 1ns

—

REFCLK

TXD[0:9]

10 Bit Data

Data Valid

21560A-7

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