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HT48CA0 Datasheet(PDF) 5 Page - Holtek Semiconductor Inc |
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HT48CA0 Datasheet(HTML) 5 Page - Holtek Semiconductor Inc |
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5 / 36 page  D.C. Characteristics Ta=25 °C Symbol Parameter Test Conditions Min. Typ. Max. Unit VDD Conditions VDD Operating Voltage — — 2.2 — 3.6 V IDD Operating Current 3V No load, fSYS=4MHz — 0.7 1.5 mA ISTB Standby Current 3V No load, system HALT —— 1 µA VIL1 Input Low Voltage for I/O Ports 3V — 0 — 1.05 V VIH1 Input High Voltage for I/O Ports 3V — 1.95 — 3 V VIL2 Input Low Voltage (RES) 3V — — 1.5 — V VIH2 Input High Voltage (RES) 3V — — 2.4 — V IOL I/O Ports Sink Current 3V VOL=0.3V 1.5 2.5 — mA IOH I/O Ports Source Current 3V VOH=2.7V –1 –1.5 — mA RPH1 Pull-high Resistance of PA Port, PB0~PB1 and RES 3V — — 60 — k Ω RPH2 Pull-high Resistance of PB2~PB7 3V — — 60 — k Ω VLVR Low Voltage Reset 3V — 1.8 2.0 2.2 V A.C. Characteristics Ta=25 °C Symbol Parameter Test Conditions Min. Typ. Max. Unit VDD Conditions fSYS System Clock 3V — 400 — 4000 kHz tRES External Reset Low Pulse Width — — 1 — — µs tSST System Start-up timer Period — Power-up or wake-up from halt —1024 — tSYS Note: tSYS=1/fSYS HT48CA0 5 23rd July ’98 |
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