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SN74LVTR245DB Datasheet(PDF) 6 Page - Texas Instruments |
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SN74LVTR245DB Datasheet(HTML) 6 Page - Texas Instruments |
6 / 7 page SN54LVTR245, SN74LVTR245 3.3-V ABT OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS SCAS428 – OCTOBER 1993 6 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 PARAMETER MEASUREMENT INFORMATION 1.5 V From Output Under Test CL = 50 pF LOAD CIRCUIT FOR OUTPUTS S1 7 V Open GND 500 Ω 500 Ω (see Note A) VOLTAGE WAVEFORMS PROPAGATION DELAY TIMES tPLH tPHL VOH VOL 1.5 V 1.5 V 2.7 V 0 V Input (see Note B) 1.5 V Output Control Output Waveform 1 S1 at 7 V (see Note C) Output Waveform 2 S1 at Open (see Note C) VOL VOH tPZL tPZH tPLZ tPHZ 1.5 V 1.5 V 3 V 0 V 1.5 V VOL + 0.3 V 1.5 V VOH – 0.3 V 0 V VOLTAGE WAVEFORMS ENABLE AND DISABLE TIMES LOW- AND HIGH-LEVEL ENABLING Output tPLH/tPHL tPLZ/tPZL tPHZ/tPZH Open 7 V GND TEST S1 2.7 V NOTES: A. CL includes probe and jig capacitance. B. 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. C. 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. D. The outputs are measured one at a time with one transition per measurement. Figure 1. Load Circuit and Voltage Waveforms |
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