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AM79C970 датащи(PDF) 138 Page - Advanced Micro Devices

номер детали AM79C970
подробное описание детали  PCnetTM-PCI Single-Chip Ethernet Controller for PCI Local Bus
PDF  168 Pages
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производитель  AMD [Advanced Micro Devices]
домашняя страница  http://www.amd.com
Logo AMD - Advanced Micro Devices

AM79C970 датащи(HTML) 138 Page - Advanced Micro Devices

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P R E L I M I N A R Y
AMD
1-1005
Am79C970
SWITCHING CHARACTERISTICS: 10BASE-T Interface
Parameter
Symbol
Parameter Description
Test Conditions
Min
Max
Unit
Transmit Timing
tTETD
Transmit Start of Idle
250
350
ns
tTR
Transmitter rise time
(10% to 90%)
5.5
ns
tTF
Transmitter fall time
(90% to 10%)
5.5
ns
tTM
Transmitter rise and fall time mismatch
(tTM = | tTR – tTF|)
1
ns
tPERLP
Idle Signal Period
8
24
ms
tPWLP
Idle Link Pulse Width
(See note below)
75
120
ns
tPWPLP
Predistortion Idle Link Pulse Width
(See note below)
45
55
ns
tJA
Transmit jabber activation time
20
150
ms
tJR
Transmit jabber reset time
250
750
ms
tJREC
Transmit jabber recovery time
1.0
µs
(minimum time gap between
transmitted frames to prevent
jabber activation)
Receiving Timing
tPWNRD
RXD pulse width not to turn off
VIN > VTHS (min)
136
ns
internal carrier sense
tPWROFF
RXD pulse width to turn off
VIN > VTHS (min)
200
ns
tRETD
Receive Start of Idle
200
ns
Note:
Not tested; parameter guaranteed by characterization.



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