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DP83256 датащи(PDF) 115 Page - Texas Instruments

номер детали DP83256
подробное описание детали  PLAYER(TM) Device (FDDI Physical Layer Controller)
PDF  146 Pages
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производитель  TI1 [Texas Instruments]
домашняя страница  http://www.ti.com
Logo TI1 - Texas Instruments

DP83256 датащи(HTML) 115 Page - Texas Instruments

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70 Electrical Characteristics (Continued)
75 AC ELECTRICAL CHARACTERISTICS
The AC Electrical characteristics are specified over the Recommended Operating Conditions unless otherwise specified
AC Characteristics for the Control Bus Interface
The following signals are covered Control Bus Interface (R EW ECE EINT EACK CBA CBD and CBP)
Symbol
Descriptions
Min
Max
Units
T1
CE Setup to LBC
15
ns
T2
LBC Period
80
ns
T3
LBC1 to ACK Low
45
ns
T4
CE Low to ACK Low
290
540
ns
T5
LBC1 Low to CBD(7 – 0) and CBP Valid
60
ns
T6
LBC1 to CBD(7 – 0) and CBP Active
5
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(5 – 0) CBD(7 – 0) and CBP Setup to CE Low
5
ns
T13
CE High to RW CBA(5 – 0) CBD(7 – 0) and CBP Hold Time
0
ns
T14
RW CBA(5 – 0) CBD(7 – 0) and CBP to LBC1 Setup Time
20
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
LBC1 to RW Hold Time
10
ns
T20b
LBC1 to CBA Hold Time
10
ns
T20c
LBC1 to CBD and CBP Hold Time
20
ns
T21
LBC1 to INT Low
55
ns
T22
LBC1 to EP Change
5
25
ns
Asynchronous Definitions
T4 (min)
T1 a (3
T2) a T3
T4 (max)
T1 a (6
T2) a T3
T7 (min)
T1 a (2
T2) a T6
T7 (max)
T1 a (5
T2) a T6
T8 (min)
T1 a (2
T2) a T9 a T5
T8 (max)
T1 a (5
T2) a T9 a T5
Note
MinMax numbers are based on T2 e 80 ns and T9 e T10 e 40 ns
114



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