HT49C50 データシートの表示（PDF） - Holtek Semiconductor
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HT49C50 Datasheet PDF : 52 Pages
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HT49C50
Symbol
Parameter
IOH
I/O Ports Source Current
RPH
Pull-high Resistance of
I/O Ports and INT0, INT1
Test Conditions
VDD Conditions
3V
VDD=3V,
VOH=2.7V
5V
VDD=5V,
VOH=4.5V
3V
¾
5V
¾
Min. Typ. Max. Unit
-1 -1.5 ¾ mA
-2 -3 ¾ mA
40 60 80 kW
10 30 50 kW
A.C. Characteristics
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
¾
Note: tSYS= 1/fSYS
Min.
455
455
400
400
0
0
45
35
1
¾
1
Ta=25°C
Typ. Max. Unit
¾ 4000 kHz
¾ 4000 kHz
¾ 2000 kHz
¾ 3000 kHz
¾ 4000 kHz
¾ 4000 kHz
90 180 ms
65 130 ms
¾ ¾ ms
1024 ¾ tSYS
¾ ¾ ms
8
August 18, 1999
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