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HT1647A Datasheet(PDF) 6 Page - Holtek Semiconductor Inc |
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HT1647A Datasheet(HTML) 6 Page - Holtek Semiconductor Inc |
6 / 19 page Symbol Parameter Test Conditions Min. Typ. Max. Unit VDD Conditions IOL2 DB0~DB3 Sink Current 3V VOL=0.3V 1.2 2.5 ¾ mA 5V VOL=0.5V 36 ¾ mA IOH2 DB0~DB3 Source Current 3V VOH=2.7V -0.9 -1.8 ¾ mA 5V VOH=4.5V -2 -4 ¾ mA IOL3 LCD Common Sink Current 3V VOL=0.3V 80 160 ¾mA 5V VOL=0.5V 180 360 ¾mA IOH3 LCD Common Source Current 3V VOH=2.7V -40 -80 ¾mA 5V VOH=4.5V -90 -180 ¾mA IOL4 LCD Segment Sink Current 3V VOL=0.3V 50 100 ¾mA 5V VOL=0.5V 120 240 ¾mA IOH4 LCD Segment Source Current 3V VOH=2.7V -30 -60 ¾mA 5V VOH=4.5V -70 -140 ¾mA RPH1 Pull-high Resistor 3V DB0~DB3, WR,CS,RD 150 250 410 k W 5V 60 125 210 k W RPH2 Pull-high Resistor 3V OP2, OP3 150 250 410 k W 5V 60 125 210 k W RPL Pull-low Resistor 3V OP1 150 250 410 k W 5V 60 125 210 k W 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 Crystal oscillator ¾ 32.768 ¾ kHz 5V ¾ 32.768 ¾ kHz fSYS3 System Clock 3V External clock source ¾ 32 ¾ kHz 5V ¾ 32 ¾ kHz fLCD1 LCD Frame Frequency 3V On-chip RC oscillator 61/117 89/170 111/213 Hz 5V 61/117 89/170 111/213 Hz fLCD2 LCD Frame Frequency 3V Crystal oscillator ¾ 64 ¾ Hz 5V ¾ 64 ¾ Hz fLCD3 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 4-Bit Data Clock (WR Pin) 3V Duty cycle 50% ¾¾ 150 kHz 5V ¾¾ 300 kHz HT1647A Rev. 1.40 6 April 29, 2011 PATENTED |
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