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PC87570 Datasheet(PDF) 137 Page - National Semiconductor (TI) |
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PC87570 Datasheet(HTML) 137 Page - National Semiconductor (TI) |
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137 / 168 page  137 Device Specifications www.national.com 19.4 AC ELECTRICAL CHARACTERISTICS The following abbreviations are used in this section: RE = Rising Edge FE = Falling Edge 19.4.1 Definitions The timing specifications in this section refer to low or high level voltage according to the specific buffer type (TTL or CMOS) on the rising or falling edges of all the signals, as illustrated in the following figures, unless specifically stated otherwise. Figure 19-2. CMOS and CMOS High Drive: Output Signals Specification Standard Figure 19-3. TTL: Input Signals Specification Standard Figure 19-4. CMOS with Hysteresis Inputs CLK SIG1 SIG2 VOH, VOHhd VO, VOLhd VOH, VOHhd VOL, VOLhd tSIG1v tSIG1a Vcc * 0.3 Vcc * 0.7 2.0V 2.40V Vcc * 0.7 Vcc * 0.3 tSIG2h tSIG1h tSIG2v tSIG2s or tSIG1ia or tSIG2ia CLK SIG1 SIG2 2.4V 0.4V 0.8V 2.0V 0.8V 2.0V tSIG1s setup tSIG1h hold tSIG2h hold tSIG2s setup VCHl VCHh Vhys |
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