HT45FM03B
A.C. Characteristics
Test Conditions
Symbol
f
SYS
Parameter
V
DD
System Clock
¾
5V
5V
5V
Conditions
4.5V~5.5V
Ta=25°C
Ta=25°C
Ta=25°C
Ta=
-20°C~125°C
f
HIRC
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
5V
f
ERC
System Clock (ERC)
Ta=25°C, R=120kW *
400
-2%
-2%
-2%
-8%
-7%
-9%
-9%
-8%
-12%
-2%
-5%
0
32
1
¾
1
0.25
¾
12
16
20
12
16
20
12
16
20
12
12
¾
65
¾
1024
¾
1
20000
+2%
+2%
+2%
+4%
+5%
+4%
+4%
+5%
+4%
+2%
+4%
4000
130
¾
¾
¾
2
kHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
kHz
ms
ms
t
SYS
ms
ms
Min.
Typ.
Max.
Unit
Ta=25°C
4.5V~ Ta=
-40°C~125°C,
5.5V R=120kW *
¾
5V
¾
¾
¾
¾
¾
¾
¾
Wake-up from HALT
¾
¾
f
TIMER
Timer I/P Frequency
(TMR0/TMR1)
t
WDTOSC
Watchdog Oscillator Period
t
RES
t
SST
t
INT
t
LVR
Note:
External Reset Low Pulse Width
System Start-up Timer Period
Interrupt Pulse Width
Low Voltage Width to Reset
1. t
SYS
=1/f
SYS
2. * For f
ERC
, 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. 1.00
5
December 16, 2009
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
