NWK914D
AC CHARACTERISTICS
Recommended operating conditions apply except where stated.
Characteristic
AC characteristics
100Mb/s TX driver outputs rise/fall times
pins TXOP, TXON
REFCLK frequency
REFCLK tolerance
REFCLK M/S ratio
REFCLK to TXC
propagation delay
TDAT0
→
4 to TXC setup time
TDAT0
→
4 to TXC hold time
RDAT0
→
4 valid to RXC +Ve edge
RXC to RDAT0
→
4 invalid
RXC M/S ratio
REFCLK to SDT transition
1
2
3
4
5
6
7
8
9
-
-
-
40:60
5
12
0
10
10
45:55
5
2.5
25
100
-
-
-
-
-
-
-
-
-
-
-
60:40
13
-
-
-
-
55:45
15
ns
MHz
ppm
%
ns
ns
ns
ns
ns
%
ns
Tx PLL in lock
100Ω differential load
measured at RJ45
Waveform
Timing
Min.
Value
Typ.
Max.
Units
Conditions
NOTE: Conditions for AC Characteristics:
All AC measurementsare made at aV
th
+ 1.5V and with TTL output loaded with 25pf
4
REFCLK
1
2
3
TXC
5
6
TDAT
0
→
4
TXO
VALID
DATA
VALID
DATA
bit 4
bit 3
bit 2
bit 1
bit 0
bit 4
Fig.4 Transmit timing waveform
9
RXC
5
8
VALID
DATA
RDAT
0
→
4
Fig.5 Receive timing waveform
5
MITEL [ MITEL NETWORKS CORPORATION ]
