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Компоненты Описание
HT49R50 Просмотр технического описания (PDF) - Holtek Semiconductor
Номер в каталоге
Компоненты Описание
производитель
HT49R50
8-Bit Microcontroller
Holtek Semiconductor
HT49R50 Datasheet PDF : 59 Pages
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HT49R50
Symbol
Parameter
Test Conditions
V
DD
Conditions
V
IL1
Input Low Voltage
3V RES=0.5V
DD
(RES, INT0, INT1, TMR0,
TMR1)
5V
INT0/1=0.3V
DD
TMR0/1=0.3V
DD
V
IH1
Input High Voltage
3V
(RES, INT0, INT1, TMR0,
TMR1)
5V
0.8V
DD
I
OL
I/O Ports Sink Current
3V
V
DD
=3V,
V
OL
=0.3V
5V
V
DD
=5V,
V
OL
=0.5V
I
OH
I/O Ports Source Current
3V
V
DD
=3V,
V
OH
=2.7V
5V
V
DD
=5V,
V
OH
=4.5V
R
PH
Pull-high Resistance of
I/O Ports and INT0, INT1
3V
5V
¾
¾
Min. Typ. Max. Unit
0
¾
1.5/0.9 V
0
¾
2.5/1.5 V
2.4
¾
3
V
4.0
¾
5
V
6 12
¾
mA
15 30
¾
mA
-
2
-
3
¾
mA
-
4
-
6
40 60
10 30
¾
mA
80 k
W
50 k
W
A.C. Characteristics
Ta=25
°
C
Symbol
Parameter
f
SYS1
System Clock (Crystal OSC)
f
SYS2
System Clock (RC OSC)
f
TIMER
Timer I/P Frequency
(TMR0/TMR1)
t
WDTOSC
Watchdog Oscillator
t
RES
t
SST
t
INT
External Reset Low
Pulse Width
System Start-up
Timer Period
Interrupt Pulse Width
Test Conditions
V
DD
Conditions
3V V
DD
=3V
5V V
DD
=5V
3V V
DD
=3V
5V V
DD
=5V
3V V
DD
=3V
5V V
DD
=5V
3V V
DD
=3V
5V V
DD
=5V
¾
¾
¾
Power-up or
wake-up from halt
¾
Min. Typ. Max. Unit
455
¾
2000 kHz
455
¾
4000 kHz
400
¾
2000 kHz
400
¾
3000 kHz
0
¾
4000 kHz
0
¾
4000 kHz
45 90 180
m
s
35 65 130
m
s
1
¾ ¾ m
s
¾
1024
¾
t
SYS
1
¾ ¾ m
s
Note: t
SYS
= 1/f
SYS
8
October 22, 1999
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