DP83257VF National Semiconductor, DP83257VF Datasheet - Page 125

• Manufacturer Part Number: DP83257VF
• Description: IC FDDI LAYER CTRLR 160PQFP
• Manufacturer: National Semiconductor

Specifications of DP83257VF

• Controller Type: physical layer controller
• Voltage - Supply: 4.75 V ~ 5.25 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 160-BFQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Current - Supply: -
• Interface: -
• Other names: *DP83257VF

7 0 Electrical Characteristics
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
AC Characteristics for Miscellaneous Interface
The following signal is covered Reset ( E RST)
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
Symbol
T60
T61
T62
Symbol
T59
Minimum Reset ( E RST) Pulse Width
Maximum Power Up Reset Cycle Duration
Maximum Hardware Reset ( E RST) Cycle Duration
SP Minimum Pulse Width
Parameter
Parameter
FIGURE 7-14 SP Minimum Pulse Width
(Continued)
FIGURE 7-15 Reset Timing
Conditions
125
Conditions
(Notes 1 2)
Min
120
Min
300
Typ
TL F 11708 – 56
Typ
TL F 11708 – 57
Max
Max
0 5
10
Units
ns
Units
ms
ms
ns