HT1620
D.C. Characteristics
Symbol
V
DD
I
DD
I
STB
V
IL
V
IH
I
OL1
I
OH1
I
OL2
I
OH2
I
OL3
I
OH3
R
PH
Parameter
Operating Voltage
Operating Current
Standby Current
Input Low Voltage
Input High Voltage
DATA, BZ, BZ, IRQ
DATA, BZ, BZ
LCD Common Sink
Current
LCD Common Source
Current
LCD Segment Sink
Current
LCD Segment Source
Current
Pull-high Resister
Test Conditions
V
DD
¾
3V
3V
3V
3V
3V
3V
3V
3V
3V
3V
3V
No load*
No load*
DATA, WR, CS, RD
DATA, WR, CS, RD
V
OL
=0.3V
V
OH
=2.7V
V
OL
=0.3V
V
OH
=2.7V
V
OL
=0.3V
V
OH
=2.7V
DATA, WR, CS, RD
Conditions
¾
Min.
2.4
¾
¾
¾
2.4
0.8
-0.6
80
-70
70
-30
40
Typ.
¾
2
¾
¾
¾
1.6
-1.2
150
-120
140
-60
80
Max.
3.3
3
1
0.6
3.0
¾
¾
¾
¾
¾
¾
150
Ta=25°C
Unit
V
mA
mA
V
V
mA
mA
mA
mA
mA
mA
kW
* No load: LCD OFF, Buzzer OFF, CS=WR=RD=High
A.C. Characteristics
Symbol
f
SYS
Parameter
System Clock
LCD Frame Frequency
f
LCD
LCD Frame Frequency 1/2 Duty
LCD Frame Frequency 1/3 Duty
LCD Frame Frequency 1/4 Duty
t
COM
f
CLK
f
TONE
LCD Common Period
Serial Data Clock
Tone Frequency
Test Conditions
V
DD
3V
¾
¾
¾
¾
¾
3V
¾
n: Number of COM
Write mode
Read mode
¾
Crystal 32kHz
Conditions
Crystal 32kHz
Min.
¾
¾
¾
¾
¾
¾
¾
¾
¾
Ta=25°C
Typ. Max. Unit
32
64
64
56
64
n/f
LCD
¾
¾
2 or 4
¾
¾
¾
¾
¾
¾
150
75
¾
kHz
Hz
Hz
Hz
Hz
s
kHz
kHz
kHz
7
July 26, 1999
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
