MCS” 51
CONTROLLER
DC CHARACTERISTICS
_r
(Over Operating Conditions)
All oarameter values armlv to all devices unless otherwise indicated (Continued)
~—.-...—.—.
r.,
.-.
Symbol
11L2
ILI
Parameter
Logical OInput Current (XTAL2)
Input Leakage Current (Porf O)
8751 H and 8751 H-8
All Others
Logical 1 Input Current (~)
8751H and 8751H-8
Min
Max
–3.2
* 1or)
t 10
Units
mA
pA
pA
Teat Conditions
VIN = 0.45V
0.45< VIN < VCC
0.45< VIN < VCC
IIH
8751
BH/8752BH
IIH1
Icc
Input Current to RST to Activate Reset
Power Supply Current:
8031AH/8051 AH/8051AHP
8032AH/8052AH/8751 BH/8752BH
8751H/8751 H-8
Pin Capacitance
500
1
500
125
175
250
10
pA
mA
pA
mA
mA
mA
pF
VIN= 2.4V
4.5V < VIN < 5.5V
VIN < (Vcc – 1.5V)
All Outputs
Disconnected;
m = Vcc
Test freq = 1 MHz
Clo
NOTES:
1. Capacitive loading on
PortsO
and 2 may csuse spurious noise pulses to be superimposed on the VOLS of ALE/PROG
and Ports 1 and 3. The noise is
dueto externalbuscapacitance
discharging the PortOand Port2 pinswhenthesepins
into
make 1-to-O
transitionsduringbus operations.In the worst cases(capacitiveloading > 100 pF), the noise pulse on the
ALE/PROG mayexceed0.8V.In suchcasesit maybe desirableto qualifyALEwitha SchmittTrigger,or usean address
pin
latchwith a Schmi~TriggerSTROBE
input.
2, ALE/PROGrefersto a pin on the 8751BH.ALErefersto a timingsignalthat is outputon the ALE/PROG
pin.
3. Understeadystate(non-transient) onditions,loL mustbe externallylimitedas follows:
c
10 mA
MaximumloL per port pin:
Maximum per 8-bitpori -
loL
26 mA
Porto:
15 mA
Ports1, 2, and 3:
Maximum
total toL for all outputpins:
71 mA
If loL exceedsthe test condition,VOLmayexceedthe relatedspecification. insare not guaranteed sinkcurrentgreater
P
to
than the listedtest conditions.
8
INTEL [ INTEL CORPORATION ]
