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CY74FCT244CTSOC Datasheet(PDF) 8 Page - Texas Instruments |
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CY74FCT244CTSOC Datasheet(HTML) 8 Page - Texas Instruments |
8 / 11 page CY54FCT240T, CY74FCT240T 8-BIT BUFFERS/LINE DRIVERS WITH 3-STATE OUTPUTS SCCS017A – MAY 1994 – REVISED OCTOBER 2001 8 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 (see Note B) Output Waveform 2 (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 7 V Open TEST S1 3 V 0 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. The outputs are measured one at a time with one input transition per measurement. From Output Under Test CL = 50 pF (see Note A) LOAD CIRCUIT FOR 3-STATE OUTPUTS S1 7 V 500 Ω GND From Output Under Test CL = 50 pF (see Note A) Test Point LOAD CIRCUIT FOR TOTEM-POLE OUTPUTS Open VOH – 0.3 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 1.5 V 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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