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DP83256 Scheda tecnica(PDF) 125 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Il numero della parte DP83256
Spiegazioni elettronici  PLAYERa??Device (FDDI Physical Layer Controller)
PDF  144 Pages
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Produttore elettronici  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
Logo NSC - National Semiconductor (TI)

DP83256 Scheda tecnica(HTML) 125 Page - National Semiconductor (TI)

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70 Electrical Characteristics (Continued)
AC Characteristics for User Definable Pins
The following signals are covered Sense Pins (SP)
For Enable Pins (EP) timing see AC Characteristics for the Control Bus Interface
Symbol
Parameter
Conditions
Min
Typ
Max
Units
T59
SP Minimum Pulse Width
120
ns
TLF11708 – 56
FIGURE 7-14 SP Minimum Pulse Width
AC Characteristics for Miscellaneous Interface
The following signal is covered Reset (ERST)
Symbol
Parameter
Conditions
Min
Typ
Max
Units
T60
Minimum Reset (ERST) Pulse Width
300
ns
T61
Maximum Power Up Reset Cycle Duration
(Notes 1 2)
10
ms
T62
Maximum Hardware Reset (ERST) Cycle Duration
05
ms
Note 1
This parameter is not tested but is assured by correlation with characterization data
Note 2
User must wait this long before trying to access the device after power up It is recommended that a Hardware Reset be used sometime after the Power Up
Reset cycle is complete to insure proper device reset
TLF11708 – 57
FIGURE 7-15 Reset Timing
125



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