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HT1620 Datasheet(PDF) 7 Page - Holtek Semiconductor Inc

Part # HT1620
Description  RAM Mapping 32x4 LCD Controller for I/O C
PDF  17 Pages
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Manufacturer  HOLTEK [Holtek Semiconductor Inc]
Direct Link  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT1620 Datasheet(HTML) 7 Page - Holtek Semiconductor Inc

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D.C. Characteristics
Ta=25°C
Symbol
Parameter
Test Conditions
Min. Typ. Max. Unit
VDD
Conditions
VDD
Operating Voltage
¾¾
2.4
¾
3.3
V
IDD
Operating Current
3V
No load*
¾
23
mA
ISTB
Standby Current
3V
No load*
¾¾
1
mA
VIL
Input Low Voltage
3V
DATA, WR,CS,RD
¾¾
0.6
V
VIH
Input High Voltage
3V
DATA, WR,CS,RD
2.4
¾
3.0
V
IOL1
DATA, BZ, BZ, IRQ
3V
VOL=0.3V
0.8
1.6
¾
mA
IOH1
DATA, BZ, BZ
3V
VOH=2.7V
-0.6
-1.2
¾
mA
IOL2
LCD Common Sink
Current
3V
VOL=0.3V
80
150
¾mA
IOH2
LCD Common Source
Current
3V
VOH=2.7V
-70
-120
¾mA
IOL3
LCD Segment Sink
Current
3V
VOL=0.3V
70
140
¾mA
IOH3
LCD Segment Source
Current
3V
VOH=2.7V
-30
-60
¾mA
RPH
Pull-high Resister
3V
DATA, WR,CS,RD
40
80
150
kW
* No load: LCD OFF, Buzzer OFF, CS=WR=RD=High
A.C. Characteristics
Ta=25°C
Symbol
Parameter
Test Conditions
Min. Typ. Max. Unit
VDD
Conditions
fSYS
System Clock
3V Crystal 32kHz
¾
32
¾
kHz
fLCD
LCD Frame Frequency
¾
Crystal 32kHz
¾
64
¾
Hz
LCD Frame Frequency 1/2 Duty
¾¾
64
¾
Hz
LCD Frame Frequency 1/3 Duty
¾¾
56
¾
Hz
LCD Frame Frequency 1/4 Duty
¾¾
64
¾
Hz
tCOM
LCD Common Period
¾ n: Number of COM
¾
n/fLCD ¾
s
fCLK
Serial Data Clock
3V
Write mode
¾¾
150 kHz
Read mode
¾¾
75
kHz
fTONE Tone Frequency
¾¾
¾
2or4
¾
kHz
HT1620
7
July 26, 1999



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