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參數(shù)資料
| 型號(hào)： | 87C749EFPN |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | 80C51 8-bit microcontroller family |
| 中文描述： | 80C51的8位單片機(jī)系列 |
| 文件頁數(shù)： | 14/22頁 |
| 文件大小： | 164K |
| 代理商： | 87C749EFPN |
Philips Semiconductors
Preliminary specification
83C749/87C749
80C51 8-bit microcontroller family
2K/64 OTP/ROM, 5 channel 8-bit A/D, PWM, low pin count
1998 Apr 23
14
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
t
CHCL
t
CLCL
t
CLCH
t
CHCX
V
CC
–0.5
0.45V
0.2 V
CC
+ 0.9
0.2 V
CC
– 0.1
t
CLCX
SU00297
Figure 4. External Clock Drive
0.2 V
CC
+ 0.9
0.2 V
CC
– 0.1
V
CC
–0.5
0.45V
SU00307
Figure 5. AC Testing Input/Output
4MHz
8MHz
12MHz
16MHz
FREQ
MAX ACTIVE I
CC6
TYP ACTIVE I
CC6
MAX IDLE I
CC7
TYP IDLE I
CC7
I
CC
mA
2
4
6
8
10
12
14
16
18
20
22
SU00308
Figure 6. I
CC
vs. FREQ
Maximum I
CC
values taken at V
CC
= 5.5V and worst case temperature.
Typical I
CC
values taken at V
CC
= 5.0V and 25
°
C.
Notes 6 and 7 refer to AC Electrical Characteristics.
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