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SN74AS4374BN Datasheet(PDF) 4 Page - Texas Instruments |
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SN74AS4374BN Datasheet(HTML) 4 Page - Texas Instruments |
4 / 5 page SN74AS4374B OCTAL EDGE-TRIGGERED D-TYPE DUAL-RANK FLIP-FLOP WITH 3-STATE OUTPUTS SDAS109D – APRIL 1989 – REVISED JANUARY 1995 4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 PARAMETER MEASUREMENT INFORMATION tPHZ tPLZ tPHL tPLH 0.3 V tPZL tPZH tPLH tPHL LOAD CIRCUIT FOR 3-STATE OUTPUTS From Output Under Test Test Point R1 = 500 Ω S1 CL = 50 pF (see Note A) 7 V 1.3 V 1.3 V 1.3 V 3.5 V 3.5 V 0.3 V 0.3 V th tsu VOLTAGE WAVEFORMS SETUP AND HOLD TIMES Timing Input Data Input 1.3 V 1.3 V 3.5 V 3.5 V 0.3 V 0.3 V High-Level Pulse Low-Level Pulse tw VOLTAGE WAVEFORMS PULSE DURATIONS Input Out-of-Phase Output 1.3 V 1.3 V 1.3 V 1.3 V 1.3 V 1.3 V 1.3 V 1.3 V 1.3 V 1.3 V 3.5 V 3.5 V 0.3 V 0.3 V VOL VOH VOH VOL Output Control Waveform 1 S1 Closed (see Note B) Waveform 2 S1 Open (see Note B) 0 V VOH VOL 3.5 V In-Phase Output 0.3 V 1.3 V 1.3 V VOLTAGE WAVEFORMS PROPAGATION DELAY TIMES VOLTAGE WAVEFORMS ENABLE AND DISABLE TIMES, 3-STATE OUTPUTS R2 = 500 Ω Open SWITCH POSITION TABLE TEST S1 tPLH tPHL tPZH tPZL tPHZ tPLZ Open Open Open Closed Open Closed 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 ns, tf ≤ 2 ns. 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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