80C451 Datasheet, PDF (12/22 Pages) NXP Semiconductors – 80C51 8-bit microcontroller family 4K/128 OTP/ROM/ROMless, expanded I/O

Philips Semiconductors
80C51 8-bit microcontroller family
4K/128 OTP/ROM/ROMless, expanded I/O
Product specification
80C451/83C451/87C451
AC ELECTRICAL CHARACTERISTICS¹ (continued)
T_amb = 0°C to +70°C, V_CC = 5V ±10%, V_SS = 0V (87C451, 83C451, 80C451)²
12MHz CLOCK
VARIABLE CLOCK
SYMBOL FIGURE
PARAMETER
MIN
MAX
MIN
MAX
Port 6 input (input rise and fall times = 5ns)
t_FLFH
8
t_ILIH
8
t_DVIH
8
t_IHDX
8
t_IVFV
9
Port 6 output
PE width
IDS width
Data setup to IDS high or PE high
Data hold after IDS high or PE high
IDS to BFLAG (IBF) delay
270
3t_CLCL+20
270
3t_CLCL+20
0
0
30
30
130
130
t_OLOH
6
t_FVDV
7
t_OLDV
6
t_OHDZ
6
t_OVFV
6
t_FLDV
6
t_OHFH
7
External Clock
ODS width
SEL to data out delay
ODS to data out delay
ODS to data float delay
ODS to AFLAG (OBF) delay
PE to data out delay
ODS to AFLAG (SEL) delay
270
3t_CLCL+20
85
85
80
80
35
35
100
100
120
120
100
100
t_CHCX
10 High time
20
20
t_CLCX
10 Low time
20
20
t_CLCH
10 Rise time
20
20
t_CHCL
10 Fall time
20
20
NOTES:
1. Parameters are valid over operating temperature range unless otherwise specified.
2. Load capacitance for port 0, ALE, and PSEN = 100pF, load capacitance for all other outputs = 80pF.
UNIT
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
1998 May 01
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