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HT1623 Datenblatt(PDF) 7 Page - Holtek Semiconductor Inc

Teilenummer HT1623
Bauteilbeschribung  RAM Mapping 48x8 LCD Controller for I/O C
PDF  18 Pages
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Hersteller  HOLTEK [Holtek Semiconductor Inc]
Direct Link  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT1623 Datenblatt(HTML) 7 Page - Holtek Semiconductor Inc

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Symbol
Parameter
Test Conditions
Min. Typ. Max. Unit
VDD
Conditions
IOL3
LCD Segment Sink Current
3V
VOL=0.3V
50
100
¾mA
5V
VOL=0.5V
120
240
¾mA
IOH3
LCD Segment Source Current
3V
VOH=2.7V
-30
-60
¾mA
5V
VOH=4.5V
-70 -140
¾mA
RPH
Pull-high Resistor
3V
DATA, WR,CS,RD
100
200
300
kW
5V
50
100
150
kW
A.C. Characteristics
Ta=25°C
Symbol
Parameter
Test Conditions
Min. Typ. Max. Unit
VDD
Conditions
fSYS1
System Clock
3V
On-chip RC oscillator
22
32
40
kHz
5V
24
32
40
kHz
fSYS2
System Clock
3V
External clock source
¾
32
¾
kHz
5V
¾
32
¾
kHz
fLCD1
LCD Frame Frequency
3V
On-chip RC oscillator
44
64
80
Hz
5V
48
64
80
Hz
fLCD2
LCD Frame Frequency
3V
External clock source
¾
64
¾
Hz
5V
¾
64
¾
Hz
tCOM
LCD Common Period
¾ n: Number of COM
¾
n/fLCD ¾
sec
fCLK1
Serial Data Clock (WR Pin)
3V
Duty cycle 50%
¾¾
150
kHz
5V
¾¾
300
kHz
fCLK2
Serial Data Clock (RD Pin)
3V
Duty cycle 50%
¾¾
75
kHz
5V
¾¾
150
kHz
tCS
Serial Interface Reset Pulse
Width
(Figure 3)
¾ CS
¾
250
¾
ns
tCLK
WR,RD Input Pulse Width
(Figure 1)
3V
Write mode
3.34
¾¾
ms
Read mode
6.67
¾¾
5V
Write mode
1.67
¾¾
ms
Read mode
3.34
¾¾
HT1623
7
April 21, 2000



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