MTD492 View Datasheet(PDF) - Myson Century Inc
Part Name
Description
Manufacturer
MTD492 Datasheet PDF : 8 Pages
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MYSON
TECHNOLOGY
MTD492
Collision Frequency (CD+)
Collision Pulse Width (CD+)
Extended Collision Detection Time (Note 6)
CD Heartbeat Delay (TX+ to CD+)
CD Heartbeat Duration(CD+)
Jabber Activation Delay(TX+ to CD+)
Jabber Reset Time-out (TX+ to TXO and CD+)
Fcp
Tcp
Tcxd
Thon
Thw
Tja
Tjr
8.5 10 12.5 MHz
40 50
60
ns
100 200 300 ms
0.6 1.1 1.6
µs
0.5 1.0 1.5
µs
20 26 32 ms
300 420 550 ms
Notes: 4. For a minimum pulse amplitude of > -300 mV.
5. IDL detection precedes the transmission turn-off by transmission propagation delay.
6. Time needed to detect an extended period of collision in order to turn off the reception path.
7.0 TIMING DIAGRAM
INPUT
TO RXI
RX+
RX-
T ron
50%
T rd 90%
50%
10%
T rf
T rr
T roff
Figure 1. Reception Timing
TX+
TX-
TXO
OUTPUT
V ts
T ton
T tst
50%
T td 90%
50%
10%
T tf
T tr
T tidl
T toff
Figure 2. Transmission Timing
TX+
TX-
CD+
CD-
T hon
T hw
Figure 3. Heartbeat Timing
INPUT
to RXI
CD+
CD-
0V
-1.75V
Vcd (max)
T con
1/Fcp
Vcd (min)
T cp
-6.8V
T coff
Figure 4. Collision Timing
-1.2V
MTD492 Revision 3.5 01/07/1997
7/8
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