83C754 Philips Semiconductors, 83C754 Datasheet - Page 18

• Manufacturer Part Number: 83C754
• Description: 80C51 8-bit microcontroller family 4K/256 OTP/ROM/ DAC/ comparator/ UART/ reference
• Manufacturer: Philips Semiconductors

Philips Semiconductors
AC ELECTRICAL CHARACTERISTICS
T
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
1998 Apr 23
amb
1/t
External Clock (Figure 17)
t
t
t
t
CHCX
CLCX
CLCH
CHCL
80C51 8-bit microcontroller family
4K/256 OTP/ROM, DAC, comparator, UART, reference
SYMBOL
CLCL
= 0 C to +70 C, V
Oscillator frequency
High time
Low time
Rise time
Fall time
CC
V
CC
V
0.45V
CC
= 5V 10%, V
–0.5
0.45V
–0.5
PARAMETER
SS
= 0V
0.2 V
0.2 V
CC
4, 8
CC
– 0.1
+ 0.9
Figure 18. AC Testing Input/Output
Figure 17. External Clock Drive
0.2 V
0.2 V
CC
CC
+ 0.9
– 0.1
t
CHCL
18
t
CLCX
MIN
20
20
16MHz CLOCK
t
CLCL
t
CLCH
t
CHCX
MAX
20
20
VARIABLE CLOCK
MIN
3.5
20
20
SU00297
SU00307
83C754/87C754
Preliminary specification
MAX
16
20
20
UNIT
MHz
ns
ns
ns
ns