HT47R20A-1 데이터 시트보기 (PDF) - Holtek Semiconductor
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HT47R20A-1 Datasheet PDF : 41 Pages
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HT47R20A-1/HT47C20-1
A.C. Characteristics
Symbol
Parameter
fSYS1
System Clock
(Crystal OSC)
fSYS2
System Clock
(RC OSC)
fSYS3
fRTCOSC
System Clock
(32768Hz Crystal OSC)
RTC Frequency
fTIMER
Timer I/P Frequency
tWDTOSC Watchdog Oscillator Period
tRES
External Reset Low Pulse Width
tSST
System Start-up Timer Period
tINT
Interrupt Pulse Width
Test Conditions
VDD
Conditions
¾ 2.2V~5.5V
¾ 3.3V~5.5V
¾ 2.2V~5.5V
¾ 3.3V~5.5V
Ta=25°C
Min. Typ. Max. Unit
400
¾ 4000 kHz
400
¾ 8000 kHz
400
¾ 4000 kHz
400
¾ 8000 kHz
¾
¾
¾ 32768 ¾
Hz
¾
¾
¾ 2.2V~5.5V
¾ 3.3V~5.5V
3V
¾
5V
¾
¾
¾
¾ Wake-up from HALT
¾
¾
¾ 32768 ¾
Hz
0
¾ 4000 kHz
0
¾ 8000 kHz
45
90
180
ms
35
65
130
ms
1
¾
¾
ms
¾ 1024 ¾
tSYS
1
¾
¾
ms
Rev. 1.80
6
June 23, 2008
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