HT1650 View Datasheet(PDF) - Holtek Semiconductor
Part Name
Description
Manufacturer
HT1650 Datasheet PDF : 19 Pages
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Symbol
Parameter
IOL4
LCD Segment Sink Current
IOH4
LCD Segment Source Current
RPH
Pull-high Resistor
PATENTED
HT1650
Test Conditions
VDD
Conditions
3V VOL=0.3V
5V VOL=0.5V
3V VOH=2.7V
5V VOH=4.5V
3V
DB0~DB3, WR, CS, RD
5V
Min.
50
120
-30
-70
150
60
Typ.
100
240
-60
-140
250
125
Max.
¾
¾
¾
¾
410
210
Unit
mA
mA
mA
mA
kW
kW
A.C. Characteristics
Symbol
Parameter
fSYS1
System Clock
Test Conditions
VDD
Conditions
3V
On-chip RC oscillator
5V
fSYS2
System Clock
3V
Crystal oscillator
5V
fSYS3
System Clock
3V
External clock source
5V
fLCD1
LCD Frame Frequency
3V
On-chip RC oscillator
5V
fLCD2
LCD Frame Frequency
3V
Crystal oscillator
5V
fLCD3
LCD Frame Frequency
3V
External clock source
5V
tCOM
LCD Common Period
¾ n: Number of COM
fCLK1
4-Bit Data Clock (WR Pin)
3V
Duty cycle 50%
5V
fCLK2
4-Bit Data Clock (RD Pin)
3V
Duty cycle 50%
5V
tCS
4-Bit Interface Reset Pulse Width
(Figure 3)
¾ CS
tCLK
WR, RD Input Pulse Width
(Figure 1)
Write mode
3V
Read mode
Write mode
5V
Read mode
tr, tf
Rise/Fall Time Serial Data Clock 3V
Width (Figure 1)
5V
¾
tsu
Setup Time for DB to WR, RD Clock 3V
Width (Figure 2)
5V
¾
th
Hold Time for DB to WR, RD Clock 3V
Width (Figure 2)
5V
¾
tsu1
Setup Time for CS to WR, RD Clock 3V
Width (Figure 3)
5V
¾
th1
Hold Time for CS to WR, RD Clock 3V
Width (Figure 3)
5V
¾
Ta=25°C
Min. Typ. Max. Unit
22
32
40 kHz
24
32
40 kHz
¾ 32.768 ¾
kHz
¾ 32.768 ¾
kHz
¾
32
¾
kHz
¾
32
¾
kHz
61/117 89/170 111/213 Hz
61/117 89/170 111/213 Hz
¾
64
¾
Hz
¾
64
¾
Hz
¾
64
¾
Hz
¾
64
¾
Hz
¾ n/fLCD ¾
sec
¾
¾
150 kHz
¾
¾
300 kHz
¾
¾
75 kHz
¾
¾
150 kHz
¾
250
¾
ns
3.34
¾
¾
ms
6.67
1.67
¾
¾
ms
3.34
¾
120
¾
ns
¾
120
¾
ns
¾
120
¾
ns
¾
100
¾
ns
¾
100
¾
ns
Rev. 1.80
6
November 9, 2010
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