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DP83251 Datasheet(PDF) 80 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # DP83251
Description  PLAYER Device (FDDI Physical Layer Controller)
PDF  96 Pages
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

DP83251 Datasheet(HTML) 80 Page - National Semiconductor (TI)

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70 Electrical Characteristics (Continued)
74 AC ELECTRICAL CHARACTERISTICS
The AC Electrical characteristics are over the operating range unless otherwise specified
AC Characteristics for the Control Bus Interface
Symbol
Parameter
Min
Max
Units
T1
CE Setup to LBC
5
ns
T2
LBC Period
80
ns
T3
LBC to ACK Low
45
ns
T4
CE Low to ACK Low
290
540
ns
T5
LBC Low to CBD(7-0) and CBP Valid
60
ns
T6
LBC to CBD(7-0) and CBP Active
60
ns
T7
CE Low to CBD(7-0) and CBP Active
225
475
ns
T8
CE Low to CBD(7-0) and CBP Valid
265
515
ns
T9
LBC Pulse Width High
35
45
ns
T10
LBC Pulse Width Low
35
45
ns
T11
CE High to ACK High
45
ns
T12
RW CBA(7-0) CBD(7-0) and
5ns
CBP Set up to CE Low
T13
CE HIgh to RW CBA(7-0)
0ns
CBD(7-0) and CBP Hold Time
T14a
RW to LBC Setup Time
0
ns
T14b
CBA to LBC Setup Time
10
ns
T14c
CBD and CBP to LBC Setup Time
0
ns
T15
ACK Low to CE High Lead Time
0
ns
T16
CE Minimum Pulse Width High
20
ns
T17
CE High to CBD(7-0) and CBP TRI-STATE
55
ns
T18
ACK High to CE Low
0
ns
T19
CBD(7-0) Valid to ACK Low Setup
20
ns
T20a
LBC to RW Hold Time
10
ns
T20b
LBC to CBA Hold Time
10
ns
T20c
LBC to CBD and CBP Hold Time
20
ns
T21
LBC to INT Low
55
ns
T22
LBC to INT High
60
ns
Asynchronous Definitions
T4 (min)
T1 a (3
T2) a T3
T4 (max)
T1 a (4
T2) a T3
T7 (min)
T1 a (2
T2) a T6
T7 (max)
T1 a (3
T2) a T6
T8 (min)
T1 a (2
T2) a T9 a T5
T8 (max)
T1 a (3
T2) a T9 a T5
Note
MinMax numbers are based on T2 e 80 ns and T9 e T10 e 40ns
80



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