am79c981 Advanced Micro Devices, am79c981 Datasheet - Page 28

• Manufacturer Part Number: am79c981
• Description: Integrated Multiport Repeater Plus? Imr+? ??9
• Manufacturer: Advanced Micro Devices

SWITCHING CHARACTERISTICS (continued)
1–98
Twisted Pair Ports
Expansion Port (Continued)
AUI Port
Parameter
t
t
Symbol
t
t
SCLKSET
SCLKHLD
t
CAHOLD
t
t
t
t
DJHOLD
t
t
t
t
t
t
t
t
PWKRD
MHSET
MHHLD
t
t
DOETD
t
PWPLP
CASET
t
PWODI
PWOCI
t
t
DJSET
PWKDI
PWKCI
PERLP
DORM
DOTD
DOTR
PWLP
DOTF
TXTD
TETD
AMD
t
t
t
TM
TR
TF
Parameter Description
DAT/JAM setup time
DAT/JAM hold time
COL/ACK setup time
COL/ACK hold time
TEST setup time with respect to RST
to enter Minimum Hub Mode
TEST hold time with respect to RST
to enter Minimum Hub Mode
SI, SCLK set up time with respect to X1
SI, SCLK hold time with respect to X1
X1 rising edge to DO toggle
DO+,DO- rise time (10% to 90%)
DO+,DO- fall time (90% to 10%)
DO+,DO- rise and fall time mismatch
DO+/- End of Transmission
DI pulse width accept/reject
threshold
DI pulse width maintain/turn-off
threshold
CI pulse width accept/reject
threshold
CI pulse width maintain/turn-off
threshold
X1 rising edge to TXD+,TXP+
TXD-,TXP- transition delay
TXD+,TXD-,TXP+,TXP- rise time
TXD+,TXD-,TXP+,TXP- fall time
TXD+,TXD-,TXP+,TXP- rise
and fall time mismatch
Transmit End of Transmission
RXD pulse width maintain/turn-off
threshold
Idle signal period
Idle Link Test pulse width (TXD+)
Idle Link Test pulse width (TXP+,TXP-)
PRELIMINARY
Am79C981
Test Conditions
|V
(Note 3)
|V
(Note 4)
|V
(Note 5)
|V
(Note 6)
|V
(Note 7)
IN
IN
IN
IN
IN
| > |V
| > |V
| > |V
| > |V
| > |V
ASQ
ASQ
ASQ
ASQ
THS
|
|
|
|
|
Min
200
275
136
275
130
2.5
2.5
10
14
14
50
50
15
10
90
75
40
5
0
–
–
–
–
–
–
8
Max
100
375
200
160
375
200
120
5.0
5.0
1.0
30
45
26
50
20
20
24
60
–
–
–
–
–
–
–
6
Unit
ms
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns