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AM79C940VCW Datenblatt(PDF) 95 Page - Advanced Micro Devices

Teilenummer AM79C940VCW
Bauteilbeschribung  Media Access Controller for Ethernet (MACE)
PDF  122 Pages
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Hersteller  AMD [Advanced Micro Devices]
Direct Link  http://www.amd.com
Logo AMD - Advanced Micro Devices

AM79C940VCW Datenblatt(HTML) 95 Page - Advanced Micro Devices

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AMD
95
Am79C940
AC CHARACTERISTICS (continued)
Parameter
No.
Symbol
Parameter Description
Test Conditions
Min
Max
IEEE 1149.1 Timing
109
tTCLK
TCK Period, 50% duty
100
cycle (+5%)
110
tsu1
TMS setup to TCK
↑
8
111
tsu2
TDI setup to TCK
↑
5
112
thd1
TMS hold time from TCK
↑
5
113
thd2
TDI hold time from TCK
↑
10
114
td1
TCK
↓ delay to TDO
30
115
td2
TCK
↓ delay to SYSTEM OUTPUT
35
10BASE-T Transmit Timing
Min
Max
Unit
125
tTETD
Transmit Start of Idle
250
350
ns
126
tTR
Transmitter Rise Time
(10% to 90%)
5.5
ns
127
tTF
Transmitter Fall Time
(90% to 10%)
5.5
ns
128
tTM
Transmitter Rise and Fall
Time Mismatch
1
ns
129
tXMTON
XMT# Asserted Delay
100
ns
130
tXMTOFF
XMT# De-asserted Delay
TBD
TBD
ms
131
tPERLP
Idle Signal Period
8
24
ms
132
tPWLP
Idle Link Pulse Width
(Note 1)
75
120
ns
133
tPWPLP
Predistortion Idle Link Pulse Width
(Note 1)
45
55
ns
134
tJA
Transmit Jabber Activation Time
20
150
ms
135
tJR
Transmit Jabber Reset Time
250
750
ms
136
tJREC
Transmit Jabber Recovery Time
1.0
µs
(Minimum Time Gap Between
Transmitted Packets to Prevent
Jabber Activation)
10BASE-T Receive Timing
140
tPWNRD
RXD Pulse Width Not to
Turn Off Internal
Carrier Sense
VIN > VTHS (min)
136
–
ns
141
tPWROFF
RXD Pulse Width to Turn Off
VIN > VTHS (min)
200
ns
142
tRETD
Receive Start of Idle
200
ns
143
tRCVON
RCV# Asserted Delay
tRON–50 tRON+100
ns
144
tRCVOFF
RCV# De-asserted Delay
TBD
TBD
ms
Note:
1. Not tested but data available upon request.



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