NWK914D Просмотр технического описания (PDF) - Zarlink Semiconductor Inc
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NWK914D Datasheet PDF : 9 Pages
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NWK914D
AC CHARACTERISTICS
Recommended operating conditions apply except where stated.
Characteristic
Waveform
Timing Min.
Value
Typ.
AC characteristics
100Mb/s TX driver outputs rise/fall times
pins TXOP, TXON
-
2.5
REFCLK frequency
1
-
25
REFCLK tolerance
2
-
100
REFCLK M/S ratio
3
40:60
-
REFCLK to TXC
propagation delay
4
5
-
TDAT0 → 4 to TXC setup time
5
12
-
TDAT0 → 4 to TXC hold time
6
0
-
RDAT0 → 4 valid to RXC +Ve edge
7
10
-
RXC to RDAT0 → 4 invalid
8
10
-
RXC M/S ratio
9
45:55
-
REFCLK to SDT transition
5
-
Max.
-
-
-
60:40
13
-
-
-
-
55:45
15
Units
ns
MHz
ppm
%
ns
ns
ns
ns
ns
%
ns
NOTE: Conditions for AC Characteristics:
All AC measurementsare made at aVth + 1.5V and with TTL output loaded with 25pf
Conditions
100Ω differential load
measured at RJ45
Tx PLL in lock
4
REFCLK
TXC
TDAT
0→4
VALID
DATA
123
5
6
VALID
DATA
TXO
bit 4
bit 3
bit 2
bit 1 bit 0
bit 4
Fig.4 Transmit timing waveform
RXC
RDAT
0→4
9
5
8
VALID
DATA
Fig.5 Receive timing waveform
5
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