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AM79C98 Datasheet(PDF) 16 Page - Advanced Micro Devices

Part # AM79C98
Description  Twisted-Pair Ethernet Transceiver (TPEX)
PDF  22 Pages
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Manufacturer  AMD [Advanced Micro Devices]
Direct Link  http://www.amd.com
Logo AMD - Advanced Micro Devices

AM79C98 Datasheet(HTML) 16 Page - Advanced Micro Devices

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AMD
16
Am79C98
SWITCHING CHARACTERISTICS over COMMERCIAL
Parameter
Symbol
Parameter Description
Min
Max
Unit
Transmit Timing
tPWODO
DO Pulse Width
|VIN| > |VASQ|
15
35
ns
Accept/Reject Threshold
(Note 3)
tPWKDO
DO Pulse Width
|VIN| > |VASQ|
105
200
ns
Maintain/Turn-Off Threshold
(Note 4)
tTON
Transmit Start Up Delay
300
ns
tTSD
Transmit Static Propagation
120
ns
Delay (DO to TXD)
tDODION
DO to DI Startup Delay
300
ns
tDODISD
DO to DI Static Propagation
100
ns
Delay
tTETD
Transmit End of Transmission
250
450
ns
tTR
Transmitter Rise Time
10
ns
(10% to 90%)
tTF
Transmitter Fall Time
10
ns
(90% to 10%)
tTM
Transmitter Rise and Fall
4
ns
Time Mismatch
tTHD
DO L–>H to TXD+ L–>H
Steady State
tTSD – 1.0
tTSD + 1.0
ns
and TXD- H->L Delay
(Note 1)
tTLD
DO H–>L to TXD+ H–>L
Steady State
tTSD – 1.0
tTSD + 1.0
ns
and TXD– L–>H Delay
(Note 1)
tTHDP
DO L–>H to TXP+ H–>L
Steady State
tTSD + 40
tTSD + 60
ns
and TXP- L->H Delay
(Note 1)
tTLDP
DO H–>L to TXP+ L–>H
Steady State
tTSD + 40
tTSD + 60
ns
and TXP– H->L Delay
(Note 1)
tXMTON
XMT Asserted Delay
100
ns
tXMTOFF
XMT De-asserted Delay
300
ns
tPERLP
Idle Signal Period
8
24
ms
tPWLP
Idle Link Test Pulse Width
(Note 1)
75
120
ns
tPWPLP
Predistortion Idle Link Test
(Note 1)
40
60
ns
Pulse Width
tJA
Transmit Jabber
20
150
ms
Activation Time
tJR
Transmit Jabber
250
750
ms
Reset Time
tJREC
Transmit Jabber
1.0
–
µs
Recovery Time (Minimum time
gap between transmitted
packets to prevent jabber
activation)



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