am79c984a Advanced Micro Devices, am79c984a Datasheet - Page 35

• Manufacturer Part Number: am79c984a
• Description: Enhanced Integrated Multiport Repeater Eimr
• Manufacturer: Advanced Micro Devices

SWITCHING CHARACTERISTICS (continued)
Notes:
1. Parameter not tested.
2. DI pulses narrower than t
3. DI pulses narrower than t
4. CI pulses narrower than t
5. CI pulses narrower than t
6. RXD pulses narrower than t
Parameter
Twisted Pair Port Timing
Control Port Timing
Symbol
carrier sense off.
carrier sense off.
RXD carrier sense off.
t
t
t
t
t
t
t
PWKRD
t
t
t
t
t
t
SCLKH
SCLKR
SODLY
PERLP
SCLKL
SCLKF
PWLP
SISET
SIHLD
TXTD
TETD
SCLK
CLK Rising Edge to TXD Transition Delay
Transmit End of Transmission
RXD Pulse Width Maintain/Turn-off
Threshold
Idle Signal Period
Idle Link Test Pulse Width
SCLK Clock Period
SCLK Clock HIGH
SCLK Clock LOW
SCLK Clock Rise Time
SCLK Clock Fall Time
SI Input Setup Time to SCLK Rising Edge
SI Input Hold Time from SCLK Rising Edge
SO Output Delay from SCLK Rising Edge
Parameter Description
PWODI
PWKDI
PWOCI
PWKCI
PWKRD
(min) will maintain internal DI carrier on; pulses wider than t
(min) will maintain internal CI carrier 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 RXD carrier sense on; a pulse wider than t
P R E L I M I N A R Y
Am79C984A
|V
C
L
IN
= 100 pF
Test Conditions
|>|V
THS
| (Note 6)
PWODI
PWOCI
(max) will turn internal DI carrier sense on.
(max) will turn internal CI carrier sense on.
Min
250
136
100
75
30
30
10
10
–
8
–
–
–
PWKDI
PWKCI
(max) will turn internal CI
(max) will turn internal DI
Max
375
200
120
PWKRD
50
24
10
10
40
–
–
–
–
–
(max) will turn
Unit
ms
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
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