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HT45R37V Datasheet(PDF) 8 Page - Holtek Semiconductor Inc |
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HT45R37V Datasheet(HTML) 8 Page - Holtek Semiconductor Inc |
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8 / 90 page  A.C. Characteristics Ta=25 °C Symbol Parameter Test Conditions Min. Typ. Max. Unit VDD Conditions fSYS1 System Clock (Crystal OSC, ERC OSC) ¾ 2.2V~5.5V 400 ¾ 4000 kHz 3.0V~5.5V 400 ¾ 8000 kHz 4.5V~5.5V 400 ¾ 12000 kHz fSYS2 System Clock (HIRC OSC) ¾ 5V -2% 4000 +2% kHz 5V -2% 8000 +2% kHz 5V -2% 12000 +2% kHz fSYS3 System Clock (RTC Crystal OSC) ¾ 2.2V~5.5V ¾ 32768 ¾ Hz f4MRCOSC 4MHz External RC OSC 5V External R=150k W-2% 4000 +2% kHz fRTCOSC RTC Frequency ¾¾ ¾ 32768 ¾ Hz fTIMER Timer I/P Frequency (TMR0/TMR1) ¾ 2.2V~5.5V 0 ¾ 4000 kHz 3.0V~5.5V 0 ¾ 8000 kHz 4.5V~5.5V 0 ¾ 12000 kHz fRC32K 32K RC Period (LIRC) ¾ 2.2V~5.5V, After Trim 28.1 31.25 34.4 ms tRES External Reset Low Pulse Width ¾¾ 1 ¾¾ ms tLVR Low Voltage Reset Time ¾¾ 0.1 0.4 0.6 ms tSST1 System Start-up Timer Period ¾ Power-on ¾ 1024 ¾ tSYS* tSST2 System Start-up Timer Period for XTAL or RTC oscillator ¾ Wake-up from Power Down Mode ¾ 1024 ¾ tSYS* tSST3 System Start-up Timer Period for RC or External Clock ¾ Wake-up from Power Down Mode ¾ 12 tSYS* tINT Interrupt Pulse Width ¾¾ 1 ¾¾ ms tAD A/D Clock Period ¾¾ 0.5 ¾¾ ms tADC A/D Conversion Time ¾¾ ¾ 16 ¾ tAD RESTD Reset Delay Time ¾¾ ¾ 100 ¾ ms tPHL, tPLH Propagation Delay Time (Clock to VFD Output) ¾ VCC=15V ¾ 100 200 ns Propagation Delay Time (Strobe to VFD Output) ¾ VCC=15V ¾ 100 200 ns tTHL, tTLH Output Transition Time ¾ VCC=15V ¾ 40 80 ns tSU Data Setup Time ¾ VCC=15V ¾ 10 20 ns tCS Setup Time (Clock to Strobe) ¾ VCC=15V ¾ 10 20 ns tH Hold Time (Data to Clock) ¾ VCC=15V ¾ 10 20 ns tSC Hold Time (Clock to Strobe) ¾ VCC=15V ¾ 75 150 ns tr,tf Clock Input Rise or Fall Time ¾ VCC=15V ¾¾ 20 ns tWC Clock Pulse Width ¾ VCC=15V ¾ 40 83 ns tWL Strobe Pulse Width ¾ VCC=15V ¾ 35 70 ns fmax Maximum Clock Input Frequency ¾ VCC=15V ¾ 8 ¾ MHz Note: *tSYS=1/fSYS1, 1/fSYS2 or 1/fSYS3 HT45R37V Rev. 1.00 8 October 20, 2009 |
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