HT45FM03B データシートの表示（PDF） - Holtek Semiconductor
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HT45FM03B Datasheet PDF : 83 Pages
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HT45FM03B
A.C. Characteristics
Ta=25°C
Symbol
Parameter
fSYS
System Clock
Test Conditions
VDD
Conditions
¾ 4.5V~5.5V
5V Ta=25°C
5V Ta=25°C
5V Ta=25°C
Ta= -20°C~125°C
fHIRC
System Clock (HIRC)
Ta= -20°C~125°C
4.5V~ Ta= -20°C~125°C
5.5V Ta= -40°C~125°C
Ta= -40°C~125°C
Ta= -40°C~125°C
fERC
System Clock (ERC)
5V Ta=25°C, R=120kW *
4.5V~ Ta= -40°C~125°C,
5.5V R=120kW *
fTIMER
Timer I/P Frequency
(TMR0/TMR1)
¾
¾
tWDTOSC Watchdog Oscillator Period
5V
¾
tRES
External Reset Low Pulse Width ¾
¾
tSST
System Start-up Timer Period
¾ Wake-up from HALT
tINT
Interrupt Pulse Width
¾
¾
tLVR
Low Voltage Width to Reset
¾
¾
Min.
400
-2%
-2%
-2%
-8%
-7%
-9%
-9%
-8%
-12%
-2%
-5%
0
32
1
¾
1
0.25
Typ.
¾
12
16
20
12
16
20
12
16
20
12
12
¾
65
¾
1024
¾
1
Max.
20000
+2%
+2%
+2%
+4%
+5%
+4%
+4%
+5%
+4%
+2%
+4%
4000
130
¾
¾
¾
2
Unit
kHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
kHz
ms
ms
tSYS
ms
ms
Note:
1. tSYS=1/fSYS
2. * For fERC, as the resistor tolerance will influence the frequency a precision resistor is recommended.
3. To maintain the accuracy of the internal HIRC oscillator frequency, a 0.1mF decoupling capacitor should be
connected between VDD and VSS and located as close to the device as possible.
Rev. 1.10
5
May 7, 2010
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