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TNETX3190 Datasheet(PDF) 62 Page - Texas Instruments |
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TNETX3190 Datasheet(HTML) 62 Page - Texas Instruments |
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62 / 66 page  TNETX3190 ThunderSWITCH ™ 16/3 ETHERNET™ SWITCH WITH 16 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS SPWS046B – FEBRUARY 1998 – REVISED APRIL 1999 62 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 LED interface operating characteristics over recommended operating conditions (see Figure 22) NO. PARAMETER MIN MAX UNIT 1 tc(LEDCLK) Cycle time, LEDCLK 96 ns 2 tw(LEDCLKH) Pulse duration, LEDCLK high 38 58 ns 3 Number of LEDCLK pulses in burst 48† 4 tc(BURST) Cycle time, LEDCLK burst 62 ms 5 td(LEDCLK) Delay time, from LEDDATA to LEDCLK ↑ 12 µs 6 td(LEDDATA) Delay time, from LEDCLK ↑ to LEDDATA (1st LED invalid) 84 µs † During hard reset, LEDCLK runs continuously. LEDCLK (output) LEDDATA (input/output) 5 2 6 1 3 4 First LED Second LED Last LED First LED Figure 22. LED |
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