Philips Semiconductors Product specification
80C31/80C32
80C51 8-bit microcontroller family
128/256 byte RAM ROMless low voltage (2.7V–5.5V),
low power, high speed (33 MHz)
2000 Aug 07
27
V
CC
–0.5
0.45V
0.2V
CC
+0.9
0.2V
CC
–0.1
NOTE:
AC inputs during testing are driven at V
CC
–0.5 for a logic ‘1’ and 0.45V for a logic ‘0’.
Timing measurements are made at V
IH
min for a logic ‘1’ and V
IL
max for a logic ‘0’.
SU00717
Figure 19. AC Testing Input/Output
V
LOAD
V
LOAD
+0.1V
V
LOAD
–0.1V
V
OH
–0.1V
V
OL
+0.1V
NOTE:
TIMING
REFERENCE
POINTS
For timing purposes, a port is no longer floating when a 100mV change from
load voltage occurs, and begins to float when a 100mV change from the loaded
V
OH
/V
OL
level occurs. I
OH
/I
OL
≥ ±20mA.
SU00718
Figure 20. Float Waveform
SU01413
TYP ACTIVE MODE
MAX IDLE MODE
TYP IDLE MODE
MAX ACTIVE
MODE
I
CC
MAX = 0.9 X FREQ. + 1.1
5
481216
FREQ AT XTAL1 (MHz)
20 24 28 32 36
15
25
30
I
CC
(mA)
10
20
35
Figure 21. I
CC
vs. FREQ
Valid only within frequency specifications of the device under test
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