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SN74LV240ANSR Fiches technique(PDF) 9 Page - Texas Instruments |
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SN74LV240ANSR Fiches technique(HTML) 9 Page - Texas Instruments |
9 / 27 page 50% VCC VCC VCC 0 V 0 V th tsu VOLTAGE WAVEFORMS SETUP AND HOLD TIMES Data Input tPLH tPHL tPHL tPLH VOH VOH VOL VOL VCC 0 V 50% VCC 50% VCC Input Out-of-Phase Output In-Phase Output Timing Input 50% VCC VOLTAGE WAVEFORMS PROPAGATION DELAY TIMES INVERTING AND NONINVERTING OUTPUTS Output Control Output Waveform 1 S1 at VCC (see Note B) Output Waveform 2 S1 at GND (see Note B) VOL VOH tPZL tPZH tPLZ tPHZ ≈VCC 0 V 50% VCC VOL + 0.3 V 50% VCC ≈0 V VCC VOLTAGE WAVEFORMS ENABLE AND DISABLE TIMES LOW- AND HIGH-LEVEL ENABLING tPLH/tPHL tPLZ/tPZL tPHZ/tPZH Open Drain Open VCC GND VCC TEST S1 VCC 0 V 50% VCC tw VOLTAGE WAVEFORMS PULSE DURATION Input From Output Under Test CL (see Note A) LOAD CIRCUIT FOR 3-STATE AND OPEN-DRAIN OUTPUTS S1 VCC RL = 1 kΩ GND From Output Under Test CL (see Note A) Test Point LOAD CIRCUIT FOR TOTEM-POLE OUTPUTS Open 50% VCC 50% VCC 50% VCC 50% VCC 50% VCC 50% VCC 50% VCC 50% VCC VOH 0.3 V SN54LV240A, SN74LV240A www.ti.com SCLS384I – SEPTEMBER 1997 – REVISED FEBRUARY 2015 8 Parameter Measurement Information 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 ≤ 3 ns, tf ≤ 3 ns. D. The outputs are measured one at a time, with one input transition per measurement. E. tPLZ and tPHZ are the same as tdis. F. tPZL and tPZH are the same as ten. G. tPHL and tPLH are the same as tpd. H. All parameters and waveforms are not applicable to all devices. Figure 3. Load Circuit and Voltage Waveforms Copyright © 1997–2015, Texas Instruments Incorporated Submit Documentation Feedback 9 Product Folder Links: SN54LV240A SN74LV240A |
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