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ML4644 Scheda tecnica(PDF) 5 Page - Micro Linear Corporation |
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ML4644 Scheda tecnica(HTML) 5 Page - Micro Linear Corporation |
5 / 11 page 5 ML4644 AC ELECTRICAL CHARACTERISTICS SYMBOLS PARAMETER MIN TYP. MAX UNITS TRANSMIT tXODY Transmitter Turn-On Delay 100 200 ns tTXSDY Transmit Steady State Prop. Delay 15 ns tTXFPW Transmit Turn-Off Pulse Width 180 ns tTXSOI Transmit Turn-Off Start of Idle 200 250 ns RECEIVE tRXODY Receive Turn-On Delay 100 200 ns tRXSDY Receive Steady State Prop. Delay 15 ns tRXFPW Receive Turn-Off Pulse Width 180 ns tRXSOI Receive Turn-Off Start of Idle 200 250 ns tAR Differential Output Rise Time 3 ns 20% to 80% (Rx±, COL±, TxOUT±) tAF Differential Output Fall Time 3 ns 20% to 80% (Rx±, COL±, TxOUT±) COLLISION tCPSQE Collision Present to SQE Assert 0 200 ns tSQEXR Time for SQE to Deactivate After a Collision 0 500 ns FCLF Collision Frequency XTAL Controlled 8.5 10 11.5 MHz Collision Pulse Duty Cycle XTAL Controlled 40 50 60 % FJAM JAM Frequency at TxOUT± XTAL Controlled 5 MHz tSQEDY SQE Test Delay (Tx Inactive to SQE) 0.6 1.1 1.6 µs tSQETD SQE Test Duration 0.5 1.0 1.5 µs JABBER, LINK TEST AND LED TIMING tJAD Jabber Activation Delay 7 13.5 20 ms tJSQE Delay from Outputs Disabled to Collision Oscillator On 100 ns tLEDT REC, COLL, Tx1, Tx2, Tx3, Tx4 On Time 0.3 1.0 3.0 ms |
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