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SN74ACT244MDWREP Fiches technique(PDF) 4 Page - Texas Instruments |
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SN74ACT244MDWREP Fiches technique(HTML) 4 Page - Texas Instruments |
4 / 10 page www.ti.com PARAMETER MEASUREMENT INFORMATION From Output Under Test CL = 50 pF (see Note A) LOAD CIRCUIT S1 2 × VCC 500 Ω 500 Ω tPLH tPHL Output Control (low-level enabling) Output Waveform 1 S1 at 2 × VCC (see Note B) Output Waveform 2 S1 at Open (see Note B) VOL VOH tPZL tPZH tPLZ tPHZ 1.5 V 1.5 V 1.5 V 1.5 V ≈VCC 3 V 0 V 50% VCC 50% VCC VOH VOL 0 V 50% VCC VOL + 0.3 V 50% VCC ≈0 V 3 V Open Input Output VOLTAGE WAVEFORMS VOLTAGE WAVEFORMS tPLH/tPHL tPLZ/tPZL tPHZ/tPZH Open 2 × VCC Open TEST S1 VOH − 0.3 V NOTES: A. CL includes probe and jig 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. All input pulses are supplied by generators having the following characteristics: PRR ≤ 1 MHz, ZO = 50 Ω, tr ≤ 2.5 ns, tf ≤ 2.5 ns. D. The outputs are measured one at a time, with one input transition per measurement. SN74ACT244-EP OCTAL BUFFER/DRIVER WITH 3-STATE OUTPUTS SCAS724B – OCTOBER 2003 – REVISED MARCH 2006 Figure 1. Load Circuit and Voltage Waveforms 4 Submit Documentation Feedback |
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