DP83905AVQB National Semiconductor, DP83905AVQB Datasheet - Page 75

• Manufacturer Part Number: DP83905AVQB
• Description: IC CONTROLR AT/LAN TP IN 160PQFP
• Manufacturer: National Semiconductor
• Series: AT/LANTIC™r

Specifications of DP83905AVQB

• Controller Type: AT, LAN Twisted-Pair Interface Controller
• Voltage - Supply: 4.75 V ~ 5.25 V
• Current - Supply: 100mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 160-BFQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Interface: -
• Other names: *DP83905AVQB

8 0 Preliminary Switching Characteristics
RESET Timing
Note 1 I O inactive is not an external signal It is used here to indicate the length of time RESET must be active before the AT LANTIC Controller recognizes it
begins to drive the ISA outputs to their inactive state and ignores ISA inputs except RESET
Note 2 RegLoad is not an external signal It is used here to indicate the length of time RESET must be active before the AT LANTIC Controller begins contiguring
When IOinactive goes active the internal pull-down resistors on the memory support buses are enabled
Note 3 If RegLoad is high the values on the memory support buses are Iatched into the configuration registers when RESET is deasserted The pull-down resistors
on this bus are enabled until RegLoad is deasserted
Note 4 EELoad is not an extemal signal it is used here to indicate when the EEPROM store is loading
Serial EEPROM Timing
Note 1 Derived from Crystal Oscillator Tolerance
Symbol
T1
T2
T3
T4
TS
Symbol
T1
T2
T3
T4
T5
T6
T7
T8
RESET Asserted Until IO Inactive Asserted (Note 1)
RESET Asserted Until RegLoad State Entered (Note 2)
RESET Deasserted Until RegLoad Deasserted (Note 3)
RESET Deasserted Until EELOAD State Entered (Note 4)
EELoad Width (Note 4)
EECS Setup to SK
EECS Hold after SK
MSD2 Low Time
MSD2 High Time
MSD2 Clock Period (Note 1)
Data In Setup to MSD2 High
Data In Hold from MSD2 High
Data Out Valid from MSD2 High
Description
e
g
Description
0 01%
75
(Continued)
Min
150
250
450
450
100
100
1
Min
400
415
100
0
Max
500
Max
320
TL F 11498 – 55
TL F 11498 – 56
Units
ns
ns
ns
ns
ns
ns
ns
Units
s
ns
ns
s
s
s