am79c974 Advanced Micro Devices, am79c974 Datasheet - Page 96

• Manufacturer Part Number: am79c974
• Description: Pcnettm-scsi Combination Ethernet And Scsi Controller For Pci Systems
• Manufacturer: Advanced Micro Devices

AC SWITCHING CHARACTERISTICS
10BASE-T Interface
Note:
Not tested; parameter guaranteed by characterization.
96
Transmit Timing
Receiving Timing
Parameter
Symbol
tPWROFF
tPWNRD
tPWPLP
tPERLP
tPWLP
tRETD
tTETD
tJREC
AMD
tTM
tJR
tTR
tTF
tJA
Parameter Description
Transmit Start of Idle
Transmitter rise time
Transmitter fall time
Transmitter rise and fall time mismatch
Idle Signal Period
Idle Link Pulse Width
Predistortion Idle Link Pulse Width
Transmit jabber activation time
Transmit jabber reset time
Transmit jabber recovery time
(minimum time gap between
transmitted frames to prevent
jabber activation)
RXD pulse width not to turn off
internal carrier sense
RXD pulse width to turn off
Receive Start of Idle
P R E L I M I N A R Y
Am79C974
Test Conditions
(10% to 90%)
(90% to 10%)
(tTM = | tTR – tTF|)
(See note below)
(See note below)
VIN > VTHS (min)
VIN > VTHS (min)
Min
250
250
136
200
1.0
75
45
20
8
Max
350
120
150
750
200
5.5
5.5
24
55
1
Unit
ms
ms
ms
ns
ns
ns
ns
ns
ns
ns
ns
ns
s