HT49CA1 View Datasheet(PDF) - Holtek Semiconductor
Part Name
Description
MFG CO.
'HT49CA1' PDF : 58 Pages View PDF
HT49RA1/HT49CA1
A.C. Characteristics
Ta=25°C
Symbol
Parameter
Test Conditions
VDD
Conditions
fSYS
System Clock
2.0V~ 4MHz ± 3%,
3.6V Temp.= 0°C ~ 50°C
3.0V 4MHz ± 2%, Temp.= 25°C
fRTCOSC RTC Frequency
¾
¾
fTIMER
Timer I/P Frequency
(TMR0/TMR1)
3V
¾
tWDTOSC Watchdog Oscillator Period
3V
¾
tRES
External Reset Low Pulse Width ¾
¾
tLVR
Low Voltage Width to Reset
¾
¾
tSST
System Start-up Timer Period
¾ Wake-up from HALT
tINT
Interrupt Pulse Width
¾¾
Min.
¾
¾
¾
0
45
1
0.25
¾
1
Typ. Max.
4000 ¾
4000 ¾
32768 ¾
¾ 4000
90 180
¾
¾
1
2
1024 ¾
¾
¾
Unit
kHz
kHz
Hz
kHz
ms
ms
ms
*tSYS
ms
Note: *tSYS=1/fSYS
Rev. 1.10
5
March 30, 2014
Share Link: 
