Philips Semiconductors Product specification
8XC54/58
8XC51FA/FB/FC/80C51FA
8XC51RA+/RB+/RC+/RD+/80C51RA+
80C51 8-bit microcontroller family
8K–64K/256–1K OTP/ROM/ROMless, low voltage (2.7V–5.5V),
low power, high speed (33MHz)
2000 Aug 07
36
DC ELECTRICAL CHARACTERISTICS
T
amb
= 0°C to +70°C or –40°C to +85°C, V
CC
= 2.7V to 5.5V, V
SS
= 0V (16MHz devices)
TEST
LIMITS
CONDITIONS
MIN TYP
1
MAX
p
4.0V < V
CC
< 5.5V –0.5 0.2V
CC
–0.1 V
IL
u
w v
2.7V<V
CC
< 4.0V –0.5 0.7 V
V
IH
Input high voltage (ports 0, 1, 2, 3, EA) 0.2V
CC
+0.9 V
CC
+0.5 V
V
IH1
Input high voltage, XTAL1, RST 0.7V
CC
V
CC
+0.5 V
V
OL
Output low voltage, ports 1, 2
8
V
CC
= 2.7V
I
OL
= 1.6mA
2
0.4 V
V
OL1
Output low voltage, port 0, ALE, PSEN
8,
7
V
CC
= 2.7V
I
OL
= 3.2mA
2
0.4 V
p
p
V
CC
= 2.7V
I
OH
= –20µA
V
CC
– 0.7 V
OH
u
u
v
,
,
,
V
CC
= 4.5V
I
OH
= –30µA
V
CC
– 0.7 V
V
OH1
Output high voltage (port 0 in external bus mode),
ALE
9
, PSEN
3
V
CC
= 2.7V
I
OH
= –3.2mA
V
CC
– 0.7 V
I
IL
Logical 0 input current, ports 1, 2, 3 V
IN
= 0.4V –1 –50 µA
I
TL
Logical 1-to-0 transition current, ports 1, 2, 3
6
V
IN
= 2.0V
See note 4
–650 µA
I
LI
Input leakage current, port 0 0.45 < V
IN
< V
CC
– 0.3 ±10 µA
I
CC
Power supply current (see Figure 36): See note 5
Active mode @ 16MHz (all except 8XC51RD+)
87C51RD+
15
16
mA
mA
Idle mode @ 16MHz 4 mA
Power-down mode or clock stopped (see Figure 40
T
amb
= 0°C to 70°C 3 50 µA
for conditions)
T
amb
= –40°C to +85°C 75 µA
R
RST
Internal reset pull-down resistor 40 225 kΩ
C
IO
Pin capacitance
10
(except EA) 15 pF
NOTES:
1. Typical ratings are not guaranteed. The values listed are at room temperature, 5V.
2. Capacitive loading on ports 0 and 2 may cause spurious noise to be superimposed on the V
OL
s of ALE and ports 1 and 3. The noise is due
to external bus capacitance discharging into the port 0 and port 2 pins when these pins make 1-to-0 transitions during bus operations. In the
worst cases (capacitive loading > 100pF), the noise pulse on the ALE pin may exceed 0.8V. In such cases, it may be desirable to qualify
ALE with a Schmitt Trigger, or use an address latch with a Schmitt Trigger STROBE input. I
OL
can exceed these conditions provided that no
single output sinks more than 5mA and no more than two outputs exceed the test conditions.
3. Capacitive loading on ports 0 and 2 may cause the V
OH
on ALE and PSEN to momentarily fall below the V
CC
–0.7 specification when the
address bits are stabilizing.
4. Pins of ports 1, 2 and 3 source a transition current when they are being externally driven from 1 to 0. The transition current reaches its
maximum value when V
IN
is approximately 2V.
5. See Figures 37 through 40 for I
CC
test conditions, and Figure 36 for I
CC
vs Freq.
Active mode: I
CC
= (0.9 × FREQ. + 1.1)mA for all devices except 8XC51RD+; 8XC51RD+ I
CC
= (0.9 x Freq +2.1) mA
Idle mode: I
CC
= (0.18 × FREQ. +1.01)mA
6. This value applies to T
amb
= 0°C to +70°C. For T
amb
= –40°C to +85°C, I
TL
= –750µA.
7. Load capacitance for port 0, ALE, and PSEN
= 100pF, load capacitance for all other outputs = 80pF.
8. Under steady state (non-transient) conditions, I
OL
must be externally limited as follows:
Maximum I
OL
per port pin: 15mA (*NOTE: This is 85°C specification.)
Maximum I
OL
per 8-bit port: 26mA
Maximum total I
OL
for all outputs: 71mA
If I
OL
exceeds the test condition, V
OL
may exceed the related specification. Pins are not guaranteed to sink current greater than the listed
test conditions.
9. ALE is tested to V
OH1
, except when ALE is off then V
OH
is the voltage specification.
10.Pin capacitance is characterized but not tested. Pin capacitance is less than 25pF. Pin capacitance of ceramic package is less than 15pF
(except EA
is 25pF).
