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SLRC400 Datasheet(PDF) 118 Page - NXP Semiconductors |
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SLRC400 Datasheet(HTML) 118 Page - NXP Semiconductors |
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118 / 130 page  Philips Semiconductors Product Specification Rev. 2.0 November 2001 I •CODE Reader IC SL RC400 118 Preliminary 19.4 Pin Characteristics 19.4.1 INPUT PIN CHARACTERISTICS Pins D0 to D7, A0 and A1 have TTL input characteristics and behave as defined in the following table. SYMBOL PARAMETER CONDITIONS MIN MAX UNIT ILeak Input Leakage Current -1.0 +1.0 µA VT Threshold 0.8 2.0 V Table 19-4: Standard Input Pin Characteristics The digital input pins NCS, NWR, NRD, ALE and A2 have Schmitt-Trigger characteristics, and behave as defined in the following table. SYMBOL PARAMETER CONDITIONS MIN MAX UNIT ILeak Input Leakage Current -1.0 +1.0 µA VT+ Positive-Going Threshold 1.4 2.0 V VT- Negative-Going Threshold 0.8 1.3 V Table 19-5: Schmitt-Trigger Input Pin Characteristics Pin RSTPD has Schmitt-Trigger CMOS characteristics. In addition, it is internally filtered with an RC-low- pass filter, which causes a relevant propagation delay for the reset signal: SYMBOL PARAMETER CONDITIONS MIN MAX UNIT ILeak Input Leakage Current -1.0 +1.0 µA VT+ Positive-Going Threshold 0.65 DVDD 0.75 DVDD V VT- Negative-Going Threshold 0.25 DVDD 0.4 DVDD V tRSTPD,p Propagation Delay 20 µs Table 19-6: RSTPD Input Pin Characteristics The analog input pin RX has the following input capacitance: SYMBOL PARAMETER CONDITIONS MIN MAX UNIT CRX Input Capacitance 15 pF Table 19-7: RX Input Capacitance |
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