HT1350 Holtek Semiconductor Inc, HT1350 Datasheet - Page 4

• Manufacturer Part Number: HT1350
• Description: Step Counter
• Manufacturer: Holtek Semiconductor Inc

Absolute Maximum Ratings
Supply Voltage.................................-0.3V to 5V
Input Voltage .................V
Note: These are stress ratings only. Stresses exceeding the range specified under ²Absolute Maxi-
Electrical Characteristics
Functional Description
The HT1350 is a step counter IC. It is used to au-
tomatically count the step number taken by a
runner and to display the whole course (kilome-
ter/mile) combined with the calories consumed
on the LCD.
The IC is turned on and off with respect to the
on/off status of a short of spring switch which
corresponds to the up/down motion of the steps.
The output of step number can be changed to
kilometers/miles or calories by counting the to-
tal number of times the step switch is closed.
Symbol
V
I
I
V
V
f
OSC
DD
STB
DD
IL
IH
mum Ratings² may cause substantial damage to the device. Functional operation of this de-
vice at other conditions beyond those listed in the specification is not implied and prolonged
exposure to extreme conditions may affect device reliability.
Operating Voltage
Operating Current
Standby Current
Input Low Voltage
Input High Voltage
System Frequency
Parameter
SS
-0.3V to V
DD
+0.3V
1.5V
1.5V
1.5V
1.5V
1.5V
V
¾
DD
Test Conditions
4
No load,
f
OSC
Conditions
The IC can automatically distinguish between
walking and jogging and make the according
calculations. The output of the LCD is busy
when the RESET key is pressed. Once the LCD
is in the busy state, the step counter will start
counting at 0 after 0.5 seconds till the runner
stops running and stands still. After the step
counter stops counting, pressing the MODE
key will display the step number®mile®kilo-
meter®calorie in sequence.
Storage Temperature.................-50°C to 125°C
Operating Temperature ..................0°C to 70°C
=32kHz
¾
¾
¾
¾
¾
0.8V
Min.
1.3
¾
¾
¾
¾
DD
Typ.
1.5
1.5
0.5
¾
¾
32
0.2V
Max.
1.7
¾
¾
3
1
June 28, 1999
DD
HT1350
Ta=25°C
Unit
kHz
mA
mA
V
V
V