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AM79C971VCW датащи(PDF) 207 Page - Advanced Micro Devices

номер детали AM79C971VCW
подробное описание детали  PCnet??FAST Single-Chip Full-Duplex 10/100 Mbps Ethernet Controller for PCI Local Bus
PDF  265 Pages
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производитель  AMD [Advanced Micro Devices]
домашняя страница  http://www.amd.com
Logo AMD - Advanced Micro Devices

AM79C971VCW датащи(HTML) 207 Page - Advanced Micro Devices

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Am79C971
207
SWITCHING CHARACTERISTICS: ATTACHMENT UNIT INTERFACE
Notes:
1. DI pulses narrower than tPWODI (min) will be rejected; pulses wider than tPWODI (max) will turn internal DI carrier sense on.
2. DI pulses narrower than tPWKDI (min) will maintain internal DI carrier sense on; pulses wider than tPWKDI (max) will turn
internal DI carrier sense off.
3. CI pulses narrower than tPWOCI (min) will be rejected; pulses wider than tPWOCI (max) will turn internal CI carrier sense on.
4. CI pulses narrower than tPWKCI (min) will maintain internal CI carrier sense on; pulses wider than tPWKCI (max) will turn inter-
nal CI carrier sense off.
Parameter
Symbol
Parameter Name
Test Condition
Min
Max
Unit
AUI Port
tDOTR
DO+, DO- Rise Time (10% to 90%)
2.5
5.0
ns
tDOTF
DO+, DO- Fall Time (10% to 90%)
2.5
5.0
ns
tDORM
DO+, DO- Rise and Fall Time
Mismatch
1.0
ns
tDOETD
DO
± End of Transmission
200
375
ns
tPWODI
DI Pulse Width Accept/Reject
Threshold
|VIN| > |VASQ|
(Note 1)
15
45
ns
tPWKDI
DI Pulse Width Maintain/Turn-Off
Threshold
|VIN| > |VASQ|
(Note 2)
136
200
ns
tPWOCI
CI Pulse Width Accept/Reject
Threshold
|VIN| > |VASQ|
(Note 3)
10
26
ns
tPWKCI
CI Pulse Width Maintain/Turn-Off
Threshold
|VIN| > |VASQ|
(Note 4)
90
160
ns
Internal MENDEC Clock Timing
tX1
XTAL1 Period
VIN = External Clock
49.995
50.001
ns
tX1H
XTAL1 HIGH Pulse Width
VIN = External Clock
20
ns
tX1L
XTAL1 LOW Pulse Width
VIN = External Clock
20
ns
tX1R
XTAL1 Rise Time
VIN = External Clock
5
ns
tX1F
XTAL1 Fall Time
VIN = External Clock
5
ns



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