Rev. 1.10
12
November 04, 2019
Rev. 1.10
13
November 04, 2019
HT45F5Q-3
Battery Charger Flash MCU
HT45F5Q-3
Battery Charger Flash MCU
A.C. Characteristics
For data in the following tables, note that factors such as oscillator type, operating voltage, operating
frequency and temperature etc., can all exert an influence on the measured values.
High Speed Internal Oscillator – HIRC – Frequency Accuracy
During the program writing operation the writer will trim the HIRC oscillator at a user selected
HIRC frequency and user selected voltage of either 3V or 5V.
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
DD
Temp.
f
HIRC
8MHz Writer Trimmed HIRC Frequency
3V/5V
25°C
-1%
8
+1%
MHz
-40°C~85°C
-2%
8
+2%
-40°C~105°C
-2%
8
+2%
2.2V~5.5V
25°C
-2.5%
8
+2.5%
-40°C~85°C
-3%
8
+3%
-40°C~105°C
-3%
8
+3%
Note: 1. The 3V/5V values for V
DD
are provided as these are the two selectable fixed voltages at which the HIRC
frequency is trimmed by the writer.
2. The row below the 3V/5V trim voltage row is provided to show the values for the full V
DD
range operating
voltage. It is recommended that the trim voltage is fixed at 3V for application voltage ranges from 2.2V
to 3.6V and fixed at 5V for application voltage ranges from 3.3V to 5.5V.
3. The minimum and maximum tolerance values provided in the table are only for the frequency at which
the writer trims the HIRC oscillator. After trimming at this chosen specific frequency any change in
HIRC oscillator frequency using the oscillator register control bits by the application program will give a
frequency tolerance to within ±20%.
Low Speed Internal Oscillator Characteristics – LIRC
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
DD
Temp.
f
LIRC
LIRC Frequency
5V
25°C
25.6
32.0
38.4
kHz
2.2V~5.5V
25°C
12.8
32.0
41.6
kHz
-40°C~85°C
8
32
60
-40°C~105°C
6
32
64
t
START
LIRC Start Up Time
—
25°C
—
—
100
μs
Operating Frequency Characteristic Curves
System Operating Frequency
Operating Voltage
8MHz
2.2V
~ ~
5.5V
~ ~
~ ~