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SN74LV244PWLE データシート(PDF) 5 Page - Texas Instruments |
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SN74LV244PWLE データシート(HTML) 5 Page - Texas Instruments |
5 / 10 page SN54LV244, SN74LV244 OCTAL BUFFERS/DRIVERS WITH 3STATE OUTPUTS SCLS194C − FEBRUARY 1993 − REVISED APRIL 1996 5 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443 PARAMETER MEASUREMENT INFORMATION Vm th tsu From Output Under Test CL = 50 pF (see Note A) LOAD CIRCUIT S1 Vz Open GND 1 k Ω 1 k Ω Data Input Timing Input Vm Vi 0 V Vm Vm Vi 0 V Vi 0 V Vm Vm tw Input VOLTAGE WAVEFORMS SETUP AND HOLD TIMES VOLTAGE WAVEFORMS PROPAGATION DELAY TIMES INVERTING AND NONINVERTING OUTPUTS VOLTAGE WAVEFORMS PULSE DURATION tPLH tPHL tPHL tPLH VOH VOH VOL VOL Vm Vm Vi 0 V Vm Vm Input Vm Output Control Output Waveform 1 S1 at Vz (see Note B) Output Waveform 2 S1 at GND (see Note B) VOL VOH tPZL tPZH tPLZ tPHZ Vm Vm 0.5 × Vz 0 V Vm VOL + 0.3 V Vm VOH − 0.3 V [ 0 V Vi VOLTAGE WAVEFORMS ENABLE AND DISABLE TIMES LOW- AND HIGH-LEVEL ENABLING Output Output tPLH/tPHL tPLZ/tPZL tPHZ/tPZH Open Vz GND TEST S1 0.5 × VCC VCC 2 × VCC 1.5 V 2.7 V 6 V WAVEFORM CONDITION VCC = 4.5 V to 5.5 V VCC = 2.7 V to 3.6 V Vm Vi Vz 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 ≤ 10 MHz, ZO = 50 Ω, tr ≤ 2.5 ns, tf ≤ 2.5 ns. D. The outputs are measured one at a time with one transition per measurement. E. tPLZ and tPHZ are the same as tdis. F. tPZL and tPZH are the same as ten. G. tPLH and tPHL are the same as tpd. Figure 1. Load Circuit and Voltage Waveforms |
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同様の説明 - SN74LV244PWLE |
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