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74F125 Datasheet(PDF) 4 Page - Texas Instruments |
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74F125 Datasheet(HTML) 4 Page - Texas Instruments |
4 / 11 page SN74F125 QUADRUPLE BUS BUFFER GATE WITH 3-STATE OUTPUTS SDFS016B – JANUARY 1989 – REVISED JULY 2002 4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 PARAMETER MEASUREMENT INFORMATION 3 V 3 V 0 V 0 V th tsu VOLTAGE WAVEFORMS SETUP AND HOLD TIMES Data Input tPLH tPHL tPHL tPLH VOH VOH VOL VOL 3 V 0 V Input Out-of-Phase Output In-Phase Output Timing Input VOLTAGE WAVEFORMS PROPAGATION DELAY TIMES INVERTING AND NONINVERTING OUTPUTS Output Control Output Waveform 1 S1 at 7 V (see Note B) Output Waveform 2 S1 at GND (see Note B) VOL VOH tPZL tPZH tPLZ tPHZ ≈3.5 V 0 V VOL + 0.3 V ≈0 V 3 V VOLTAGE WAVEFORMS ENABLE AND DISABLE TIMES LOW- AND HIGH-LEVEL ENABLING tPLH/tPHL tPLZ/tPZL tPHZ/tPZH Open Collector Open 7 V Open 7 V TEST S1 3 V 0 V 1.5 V tw VOLTAGE WAVEFORMS PULSE DURATION Input 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, duty cycle = 50%. D. The outputs are measured one at a time with one input transition per measurement. From Output Under Test CL (see Note A) LOAD CIRCUIT FOR 3-STATE AND OPEN-DRAIN OUTPUTS S1 7 V 500 Ω From Output Under Test CL (see Note A) Test Point LOAD CIRCUIT FOR TOTEM-POLE OUTPUTS Open VOH – 0.3 V 1.5 V 1.5 V 1.5 V 1.5 V 1.5 V 1.5 V 1.5 V 1.5 V 500 Ω 500 Ω 1.5 V 1.5 V 1.5 V 1.5 V 1.5 V 1.5 V 1.5 V Figure 1. Load Circuit and Voltage Waveforms |
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