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CD74HCT573M 데이터시트(PDF) 5 Page - Texas Instruments |
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CD74HCT573M 데이터시트(HTML) 5 Page - Texas Instruments |
5 / 16 page CD54HCT573, CD74HCT573 OCTAL TRANSPARENT DTYPE LATCHES WITH 3STATE OUTPUTS SCLS455C − FEBRUARY 2001 − REVISED MAY 2004 5 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 PARAMETER MEASUREMENT INFORMATION Test Point From Output Under Test CL (see Note A) VCC S1 S2 LOAD CIRCUIT PARAMETER tPZH tpd or tt tdis ten tPZL tPHZ tPLZ Open Closed S1 Closed Open S2 Open Closed Closed Open Open Open NOTES: A. CL includes probe and test-fixture capacitance. B. Waveform 1 is for an output with internal conditions such that the output is low, except when disabled by the output control. Waveform 2 is for an output with internal conditions such that the output is high, except when disabled by the output control. C. 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. D. For clock inputs, fmax is measured with the input duty cycle at 50%. E. The outputs are measured one at a time, with one input transition per measurement. F. tPLZ and tPHZ are the same as tdis. G. tPZL and tPZH are the same as ten. H. tPLH and tPHL are the same as tpd. 1 k Ω VOLTAGE WAVEFORMS SETUP AND HOLD AND INPUT RISE AND FALL TIMES th tsu 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 VOLTAGE WAVEFORMS PROPAGATION DELAY AND OUTPUT TRANSITION TIMES 1.3 V 10% 10% 90% 90% 3 V VOH VOL 0 V tr tf Input In-Phase Output tPLH tPHL 1.3 V 10% 10% 90% 90% VOH VOL tr tf tPHL tPLH Out-of-Phase Output 0 V tw VOLTAGE WAVEFORMS PULSE DURATION Input 3 V Output Control Output Waveform 1 (see Note B) Output Waveform 2 (see Note B) VOL VOH tPZL tPZH tPLZ tPHZ ≈VCC 0 V 10% ≈0 V VOLTAGE WAVEFORMS OUTPUT ENABLE AND DISABLE TIMES 90% 3 V VOLTAGE WAVEFORMS RECOVERY TIME 3 V 0 V CLR Input CLK 3 V trec 0 V 1.3 V 1.3 V 1.3 V 1.3 V 1.3 V 1.3 V 1.3 V 1.3 V 1.3 V 1.3 V 1.3 V 1.3 V 1.3 V 1.3 V Figure 1. Load Circuit and Voltage Waveforms |
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