NS486SXF Datasheet, PDF (19/44 Pages) National Semiconductor (TI) – NS486TMSXF Optimized 32-Bit 486-Class Controller with On-Chip Peripherals for Embedded Systems

3 0 Device Specifications (Continued)
3 1 4 DC Characteristics (Under Recommended Operating Conditions)
Symbol
Parameter
Condition
Min
Typ
V_IH
Input High Voltage
20
V_IL
Input Low Voltage
b0 5
I_CC
V_DD Average Supply Current
V_IL e 0 5V
V_IH e 2 4V
No Load
Note 1 Value based on test complying with NSC SOP5-028 human body model ESD testing using the ETS-910 tester
Note 2 Absolute Maximum Ratings are those values beyond which damage to the device may occur
Note 3 Unless otherwise specified all voltages are referenced to ground
3 1 4 1 EXTERNAL BUS
Symbol
Parameter
Condition
Min
Max
V_OH
Output High Voltage
I_OH e b6 mA (Nch Quiet-drive) or
I_OH e b24 mA (High-drive) on
SA12–1 DP1 – 0 SD15 – 0
24
I_OH e b12 mA on
SA0 SA25 – 13
SA0 b min 10 kX pullup
V_OL
Output Low Voltage
I_OL e 20 mA on
SA12– 1 DP1 –0 SD15 –0
I_OL e 12 mA on
04
SA0 SA25 – 13 BHE
Max
V_DD
08
Units
V
V
mA
Units
V
Notes
Max Load
on
SA12 – 1 is
100 pF and
SD0 – 15 is
50 pF
V
3 1 4 2 DMA CONTROL UNIT
Symbol
V_OH
Parameter
Output High Voltage
V_OL
Output Low Voltage
Condition
I_OH e b6 mA on
TC EOP
I_OH e b4 mA on
DACK4 DACK3 DACK2
DACK0
I_OL e 6 mA on
TC EOP
I_OL e 4 mA on
DACK4 DACK3 DACK2
DACK0
Min
Max
Units
Notes
24
V
04
V
3 1 4 3 DRAM CONTROL UNIT
Symbol
Parameter
Condition
Min Max Units
Notes
V_OH
Output High Voltage I_OH e b6 mA(Nch Quiet-drive) or
I_OH e b24 mA (High-drive) on
RAS0–1 CASH0 – 1 CASL0 – 1
24
WE
Max load on
V
RAS1 – 0 CASH1 –0
and CASL1 –0 is
63 pF
V_OL
Output Low Voltage
I_OL e 20 mA on
RAS1–0 CASH1 – 0 CASL1 – 0
WE
Max load on
04
V
WE is
100 pF
19
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