83C754 Datasheet, PDF (18/26 Pages) NXP Semiconductors – 80C51 8-bit microcontroller family 4K/256 OTP/ROM, DAC, comparator, UART, reference

Philips Semiconductors
80C51 8-bit microcontroller family
4K/256 OTP/ROM, DAC, comparator, UART, reference
Preliminary specification
83C754/87C754
AC ELECTRICAL CHARACTERISTICS
T_amb = 0°C to +70°C, V_CC = 5V ±10%, V_SS = 0V^{4, 8}
SYMBOL
PARAMETER
1/t_CLCL
Oscillator frequency
External Clock (Figure 17)
t_CHCX
t_CLCX
t_CLCH
t_CHCL
High time
Low time
Rise time
Fall time
EXPLANATION OF THE AC SYMBOLS
Each timing symbol has five characters. The first character is always
‘t’ (= time). The other characters, depending on their positions,
indicate the name of a signal or the logical status of that signal.
The designations are:
C – Clock
D – Input data
H – Logic level high
L – Logic level low
Q – Output data
T – Time
V – Valid
X – No longer a valid logic level
Z – Float
16MHz CLOCK
MIN
MAX
20
20
20
20
V_CC –0.5
0.45V
0.2 V_CC + 0.9
0.2 V_CC – 0.1
t_CLCX
t_CHCL
t_CLCL
t_CHCX
t_CLCH
Figure 17. External Clock Drive
V_CC –0.5
0.45V
0.2 V_CC + 0.9
0.2 V_CC – 0.1
Figure 18. AC Testing Input/Output
VARIABLE CLOCK
MIN
MAX
3.5
16
20
20
20
20
UNIT
MHz
ns
ns
ns
ns
SU00297
SU00307
1998 Apr 23
18