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TNETX3151 bảng dữ liệu(PDF) 54 Page - Texas Instruments

tên linh kiện TNETX3151
Giải thích chi tiết về linh kiện  ThunderSWITCHE 12/3 ETHERNETE SWITCH WITH 12 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS
PDF  65 Pages
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TNETX3151 bảng dữ liệu(HTML) 54 Page - Texas Instruments

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TNETX3151
ThunderSWITCH
™ 12/3 ETHERNET™ SWITCH
WITH 12 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS
SPWS048A – MARCH 1998 – REVISED APRIL 1999
54
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
10-/100-Mbit/s transmit ports (12, 13, and 14)
timing requirements (see Figure 14)†
NO.
MIN
MAX
UNIT
1
tc(MxxTCLK)
Cycle time, MxxTCLK
25
25
ns
2
tw(MxxTCLKL)
Pulse duration, MxxTCLK low
ns
3
tw(MxxTCLKH)
Pulse duration, MxxTCLK high
14
ns
† xx = ports 12, 13, and 14
operating characteristics over recommended operating conditions (see Note 8 and Figure 14)†
NO.
PARAMETER
MIN
MAX
UNIT
4
td(MxxTXD)
Delay time, from MxxTCLK
↑ to MxxTXD3–MxxTXD0 valid
0
25
ns
4
td(MxxTXEN)
Delay time, from MxxTCLK
↑ to MxxTXEN valid
0
25
ns
4
td(MxxTXER)
Delay time, from MxxTCLK
↑ to MxxTXER valid
0
25
ns
† xx = ports 12, 13, and 14
NOTE 8: Both MxxCRS and MxxCOL are driven asynchronously by the PHY. MxxTXD3–MxxTXD0 is driven by the reconciliation sublayer
synchronous to the MxxTCLK. MxxTXEN is asserted and deasserted by the reconciliation sublayer synchronous to the MxxTCLK rising
edge. MxxTXER is driven synchronous to the rising edge of MxxTCLK.
4
MxxTXD3–MxxTXD0
MxxTXEN
MxxTXER
(outputs)
MxxTCLK
(input)
2
3
1
Figure 14. 10-/100-Mbit/s Transmit Ports



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