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CD74FCT821A 数据表(PDF) 5 Page - Texas Instruments |
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CD74FCT821A 数据表(HTML) 5 Page - Texas Instruments |
5 / 9 page CD74FCT821A BiCMOS 10-BIT BUS-INTERFACE FLIP-FLOP WITH 3-STATE OUTPUTS SCBS731 − JULY 2000 5 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 1.5 V 1.5 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 1.5 V VOL + 0.3 V 1.5 V ≈0 V 3 V VOLTAGE WAVEFORMS ENABLE AND DISABLE TIMES LOW- AND HIGH-LEVEL ENABLING tPLH/tPHL tPLZ/tPZL tPHZ/tPZH Open Drain 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 and tf = 2.5 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. From Output Under Test CL = 50 pF (see Note A) LOAD CIRCUIT FOR 3-STATE AND OPEN-DRAIN 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 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 VOLTAGE WAVEFORM INPUT RISE AND FALL TIMES 1.5 V 1.5 V 10% 10% 90% 90% 3 V 0 V tr tf Figure 1. Load Circuit and Voltage Waveforms |
类似零件编号 - CD74FCT821A_13 |
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类似说明 - CD74FCT821A_13 |
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