HT49R50 Ver la hoja de datos (PDF) - Holtek Semiconductor
Número de pieza
componentes Descripción
Fabricante
HT49R50 Datasheet PDF : 59 Pages
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HT49R50
Symbol
Parameter
Test Conditions
VDD
Conditions
VIL1
Input Low Voltage
3V RES=0.5VDD
(RES, INT0, INT1, TMR0,
TMR1)
5V
INT0/1=0.3VDD
TMR0/1=0.3VDD
VIH1
Input High Voltage
3V
(RES, INT0, INT1, TMR0,
TMR1)
5V
0.8VDD
IOL
I/O Ports Sink Current
3V
VDD=3V,
VOL=0.3V
5V
VDD=5V,
VOL=0.5V
IOH
I/O Ports Source Current
3V
VDD=3V,
VOH=2.7V
5V
VDD=5V,
VOH=4.5V
RPH
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 kW
50 kW
A.C. Characteristics
Ta=25°C
Symbol
Parameter
fSYS1
System Clock (Crystal OSC)
fSYS2
System Clock (RC OSC)
fTIMER
Timer I/P Frequency
(TMR0/TMR1)
tWDTOSC Watchdog Oscillator
tRES
tSST
tINT
External Reset Low
Pulse Width
System Start-up
Timer Period
Interrupt Pulse Width
Test Conditions
VDD
Conditions
3V VDD=3V
5V VDD=5V
3V VDD=3V
5V VDD=5V
3V VDD=3V
5V VDD=5V
3V VDD=3V
5V VDD=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 ms
35 65 130 ms
1
¾ ¾ ms
¾ 1024 ¾ tSYS
1
¾ ¾ ms
Note: tSYS= 1/fSYS
8
October 22, 1999
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