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AM79C981 数据表(PDF) 28 Page - Advanced Micro Devices

部件名 AM79C981
功能描述  Integrated Multiport Repeater Plus??(IMR??
PDF  40 Pages
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制造商  AMD [Advanced Micro Devices]
网页  http://www.amd.com
标志 AMD - Advanced Micro Devices

AM79C981 数据表(HTML) 28 Page - Advanced Micro Devices

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AMD
PRELIMINARY
1–98
Am79C981
SWITCHING CHARACTERISTICS (continued)
Parameter
Symbol
Parameter Description
Test Conditions
Min
Max
Unit
Expansion Port (Continued)
tDJSET
DAT/JAM setup time
10
–
ns
tDJHOLD
DAT/JAM hold time
14
–
ns
tCASET
COL/ACK setup time
5
–
ns
tCAHOLD
COL/ACK hold time
14
–
ns
tMHSET
TEST setup time with respect to
RST
200
–
ns
to enter Minimum Hub Mode
tMHHLD
TEST hold time with respect to
RST
0
100
ns
to enter Minimum Hub Mode
tSCLKSET
SI, SCLK set up time with respect to X1
50
–
ns
tSCLKHLD
SI, SCLK hold time with respect to X1
50
–
ns
AUI Port
tDOTD
X1 rising edge to DO toggle
–
30
ns
tDOTR
DO+,DO- rise time (10% to 90%)
2.5
5.0
ns
tDOTF
DO+,DO- fall time (90% to 10%)
2.5
5.0
ns
tDORM
DO+,DO- rise and fall time mismatch
–
1.0
ns
tDOETD
DO+/- End of Transmission
275
375
ns
tPWODI
DI pulse width accept/reject
|VIN| > |VASQ|
15
45
ns
threshold
(Note 3)
tPWKDI
DI pulse width maintain/turn-off
|VIN| > |VASQ|
136
200
ns
threshold
(Note 4)
tPWOCI
CI pulse width accept/reject
|VIN| > |VASQ|
10
26
ns
threshold
(Note 5)
tPWKCI
CI pulse width maintain/turn-off
|VIN| > |VASQ|
90
160
ns
threshold
(Note 6)
Twisted Pair Ports
tTXTD
X1 rising edge to TXD+,TXP+
–
50
ns
TXD-,TXP- transition delay
tTR
TXD+,TXD-,TXP+,TXP- rise time
–
20
ns
tTF
TXD+,TXD-,TXP+,TXP- fall time
–
20
ns
tTM
TXD+,TXD-,TXP+,TXP- rise
–
6
ns
and fall time mismatch
tTETD
Transmit End of Transmission
275
375
ns
tPWKRD
RXD pulse width maintain/turn-off
|VIN| > |VTHS|
130
200
ns
threshold
(Note 7)
tPERLP
Idle signal period
8
24
ms
tPWLP
Idle Link Test pulse width (TXD+)
75
120
ns
tPWPLP
Idle Link Test pulse width (TXP+,TXP-)
40
60
ns



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