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AM79C974 bảng dữ liệu(PDF) 96 Page - Advanced Micro Devices

tên linh kiện AM79C974
Giải thích chi tiết về linh kiện  PCnetTM-SCSI Combination Ethernet and SCSI Controller for PCI Systems
PDF  153 Pages
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nhà sản xuất  AMD [Advanced Micro Devices]
Trang chủ  http://www.amd.com
Logo AMD - Advanced Micro Devices

AM79C974 bảng dữ liệu(HTML) 96 Page - Advanced Micro Devices

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AMD
P R E L I M I N A R Y
96
Am79C974
AC 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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