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AM79C873 Datasheet(PDF) 38 Page - Advanced Micro Devices |
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AM79C873 Datasheet(HTML) 38 Page - Advanced Micro Devices |
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38 / 44 page ![]() 38 Am79C873 PRELIMINARY 10BASE-T SQE (Heartbeat) Timing Figure 12. 10BASE-T SQE (Heartbeat) Timing Diagram 10BASE-T SQE (Heartbeat) Timing Parameters 10BASE-T Jab and Unjab Timing Figure 13. 10BASE-T Jab and Unjab Timing Diagram 10BASE-T Jab and Unjab Timing Parameters TX_CLK TX_EN COL t2 t1 22164A-14 Symbol Parameter Conditions Min Typical Max Unit t1 COL (SQE) Delay After TX_EN Off 0.65 1.3 1.6 ms t2 COL (SQE) Pulse Duration 0.5 1.1 1.5 ms TX_EN t1 t2 TDX COL 22164A-15 Symbol Parameter Conditions Min Typical Max Unit t1 Maximum Transmit Time 20 48 150 ms t2 Unjab Time 250 505 1500 ms |
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