am79c981 Advanced Micro Devices, am79c981 Datasheet - Page 29

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

SWITCHING CHARACTERISTICS (continued)
Notes:
1. Parameter not tested.
2. Uses switching test load.
3. DI pulses narrower than t
4. DI pulses narrower than t
5. CI pulses narrower than t
6. CI pulses narrower than t
7. RXD pulses narrower than t
8. For the typical twisted pair load as shown in Figure 7, using a 100
DI carrier sense off.
internal CI carrier sense off.
turn internal RXD carrier sense off.
required for each twisted pair port used. Less than 18% of the power associated with this additional current is dissipated
by the IMR+ chip; the remainder is dissipated externally in the twisted pair load and cable.
PWKDI
PWODI
PWOCI
PWKCI
PWKRD
(min) will maintain internal DI carrier sense on; pulses wider than t
(min) will be rejected; pulses wider than t
(min) will be rejected; pulses wider than t
(min) will maintain internal CI carrier sense on; pulses wider than t
(min) will maintain internal RXD carrier sense on; pulse wider than t
PRELIMINARY
Am79C981
cable, an additional 28 mA (max) of I
PWODI
PWOCI
(max) will turn internal DI carrier sense on.
(max) will turn internal CI carrier sense on.
PWKDI
PWKCI
(max) will turn internal
PWKRD
(max) will turn
DD
current is
(max) will
AMD
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