p87c453ebaa NXP Semiconductors, p87c453ebaa Datasheet - Page 20

• Manufacturer Part Number: p87c453ebaa
• Description: 80c51 8-bit Microcontroller Family 8k/256 Otp/rom, Expanded I/o
• Manufacturer: NXP Semiconductors

Philips Semiconductors
1998 Apr 23
NOTE:
AC inputs during testing are driven at V
Timing measurements are made at V
80C51 8-bit microcontroller family
8K/256 OTP/ROM, expanded I/O
V
CC
0.45V
–0.5
Figure 18. AC Testing Input/Output
0.2V
0.2V
IH
CC
CC
CC
min for a logic ‘1’ and V
+0.9
–0.1
–0.5 for a logic ‘1’ and 0.45V for a logic ‘0’.
VALID ONLY WITHIN FREQUENCY SPECIFICATIONS OF THE DEVICE UNDER TEST.
I
V
CC
CC
0.45V
mA
–0.5
IL
30
25
20
15
10
max for a logic ‘0’.
5
Figure 17. External Clock Drive
0.2V
t
CHCL
SU00717
Figure 20. I
0.7V
4MHz
CC
CC
–0.1
FREQ AT XTAL1
8MHz
20
CC
t
CLCX
vs. FREQ
12MHz
NOTE:
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
V
OH
t
LOAD
CLCL
/V
OL
16MHz
t
level occurs. I
CHCX
t
V
V
CLCH
LOAD
LOAD
MAX ACTIVE MODE
TYP ACTIVE MODE
MAX IDLE MODE
TYP IDLE MODE
–0.1V
+0.1V
SU00009
OH
Figure 19. Float Waveform
/I
OL
SU00092
20mA.
REFERENCE
83C453/87C453
TIMING
POINTS
Preliminary specification
V
V
OH
OL
SU00718
+0.1V
–0.1V