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HT48R02 Datasheet(PDF) 5 Page - Holtek Semiconductor Inc |
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HT48R02 Datasheet(HTML) 5 Page - Holtek Semiconductor Inc |
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5 / 38 page  A.C. Characteristics Ta=25 °C Symbol Parameter Test Conditions Min. Typ. Max. Unit VDD Conditions fSYS1 System Clock (Crystal OSC, RC OSC) ¾ 2.2V~5.5V 400 ¾ 4000 kHz ¾ 3.3V~5.5V 400 ¾ 8000 kHz ¾ 4.5V~5.5V 400 ¾ 12000 kHz fSYS2 System Clock (Internal RC OSC) ( ±10%) 4.5V~ 5.5V 12MHz, Ta=25 °C 10800 12000 13200 kHz 3.3V~ 5.5V 8MHz, Ta=25 °C 7200 8000 8800 kHz 2.2V~ 5.5V 4MHz, Ta=25 °C 3600 4000 4400 kHz fSYS3 System Clock (32768 Crystal) ¾¾ ¾ 32768 ¾ Hz fTIMER Timer I/P Frequency (TMR) ¾ 2.2V~5.5V 0 ¾ 4000 kHz ¾ 3.3V~5.5V 0 ¾ 8000 kHz ¾ 4.5V~5.5V 0 ¾ 12000 kHz tWDTOSC Watchdog Oscillator Period 3V ¾ 45 90 180 ms 5V ¾ 32 65 130 ms tRES External Reset Low Pulse Width ¾¾ 1 ¾¾ ms tSST System Start-up Timer Period ¾ Wake-up from HALT ¾ 1024 ¾ tSYS tINT Interrupt Pulse Width ¾¾ 1 ¾¾ ms tLVR Low Voltage Width to Reset ¾¾ 0.25 1 2 ms VPOR VDD Start Voltage to Ensure Power-on Reset ¾¾ ¾ ¾ 100 mV RPOR VDD Rise Rate to Ensure Power-on Reset ¾¾ 0.035 ¾¾ V/ms Note: tSYS=1/fSYS1, 1/fSYS2 or 1/fSYS3 HT48R01/HT48R02/HT48R03 Rev. 1.00 5 December 20, 2006 |
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