HT47C20 View Datasheet(PDF) - Holtek Semiconductor
Part Name
Description
MFG CO.
'HT47C20' PDF : 56 Pages View PDF
A.C. Characteristics
Symbol
Parameter
fSYS1
fSYS2
fTIMER
tWDTOSC
tRES
System Clock (Crystal OSC)
System Clock (RC OSC)
Timer I/P Frequency (TMR)
Watchdog Oscillator
External Reset Low Pulse Width
tSST
System Start-up Timer Period
tINT
Interrupt Pulse Width
fAD
A/D Converter Frequency
Note: tSYS=1/fSYS
HT47C20
Ta=25°C
Test Conditions
VDD
Conditions
3V
¾
Min. Typ. Max. Unit
455 ¾ 480 kHz
3V
¾
3V
¾
64
¾ 500 kHz
0
¾ 500 kHz
3V
¾
45 90 180 ms
¾
¾
10
¾
¾
ms
¾
Power-up or wake-up
from HALT
¾
1024
¾
tSYS
¾
¾
10
¾
¾
ms
3V
¾
¾
¾ 500 kHz
Rev. 1.60
7
July 26, 2002
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