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AM79C981 Datasheet(PDF) 28 Page - Advanced Micro Devices

Part # AM79C981
Description  Integrated Multiport Repeater Plus??(IMR??
PDF  40 Pages
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Manufacturer  AMD [Advanced Micro Devices]
Direct Link  http://www.amd.com
Logo AMD - Advanced Micro Devices

AM79C981 Datasheet(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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