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SN74HCT273DWR データシート(PDF) 5 Page - Texas Instruments |
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SN74HCT273DWR データシート(HTML) 5 Page - Texas Instruments |
5 / 16 page SN54HCT273, SN74HCT273 OCTAL DTYPE FLIPFLOPS WITH CLEAR SCLS068E − NOVEMBER 1988 − REVISED AUGUST 2003 5 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 operating characteristics, VCC = 5 V, TA = 25°C PARAMETER TEST CONDITIONS TYP UNIT Cpd Power dissipation capacitance No load 30 pF PARAMETER MEASUREMENT INFORMATION VOLTAGE WAVEFORMS SETUP AND HOLD AND INPUT RISE AND FALL TIMES VOLTAGE WAVEFORMS PULSE DURATIONS th tsu 1.3 V 1.3 V 1.3 V 0.3 V 0.3 V 2.7 V 2.7 V 3 V 3 V 0 V 0 V tr tf Reference Input Data Input 1.3 V High-Level Pulse 1.3 V 3 V 0 V 1.3 V 1.3 V 3 V 0 V tw Low-Level Pulse VOLTAGE WAVEFORMS PROPAGATION DELAY AND OUTPUT RISE AND FALL TIMES 1.3 V 1.3 V 1.3 V 10% 10% 90% 90% 3 V VOH VOL 0 V tr tf Input In-Phase Output 1.3 V tPLH tPHL 1.3 V 1.3 V 10% 10% 90% 90% VOH VOL tr tf tPHL tPLH Out-of- Phase Output Test Point From Output Under Test CL = 50 pF (see Note A) LOAD CIRCUIT NOTES: A. CL includes probe and test-fixture capacitance. B. Phase relationships between waveforms were chosen arbitrarily. All input pulses are supplied by generators having the following characteristics: PRR ≤ 1 MHz, ZO = 50 Ω, tr = 6 ns, tf = 6 ns. C. The outputs are measured one at a time with one input transition per measurement. D. For clock inputs, fmax is measured when the input duty cycle is 50%. E. tPLH and tPHL are the same as tpd. Figure 1. Load Circuit and Voltage Waveforms |
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