87C751 Philips Semiconductors, 87C751 Datasheet - Page 8

• Manufacturer Part Number: 87C751
• Description: 80C51 8-bit microcontroller family 2K/64 OTP/ROM/ I2C/ low pin count
• Manufacturer: Philips Semiconductors

Philips Semiconductors
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:
1998 May 01
80C51 8-bit microcontroller family
2K/64 OTP/ROM, I
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
V
CC
0.45V
–0.5
Maximum I
2
C, low pin count
I
Notes 5 and 6 refer to DC Electrical Characteristics.
0.2 V
CC
0.2 V
Typical I
CC
(mA)
CC
CC
values taken at V
– 0.1
+ 0.9
22
20
18
16
14
12
10
CC
8
6
4
2
Figure 1. External Clock Drive
values taken at V
Figure 2. I
4MHz
t
CHCL
CC
8MHz
CC
t
8
FREQ
CLCX
max and worst case temperature.
vs. FREQ
CC
12MHz
= 5.0V and 25 C.
t
CLCL
16MHz
t
CLCH
MAX ACTIVE I
TYP ACTIVE I
MAX IDLE I
TYP IDLE I
t
CHCX
SU00298
CC
CC
CC
6
CC
6
5
5
SU00297
83C751/87C751
Product specification