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SN74273 Datasheet(PDF) 4 Page - Texas Instruments |
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SN74273 Datasheet(HTML) 4 Page - Texas Instruments |
4 / 8 page SN54273, SN54LS273, SN74273, SN74LS273 OCTAL D-TYPE FLIP-FLOP WITH CLEAR SDLS090 – OCTOBER 1976 – REVISED MARCH 1988 4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 switching characteristics, VCC = 5 V, TA = 25°C PARAMETER TEST CONDITIONS MIN TYP MAX UNIT fmax Maximum clock frequency C 30 40 MHz tPHL Propagation delay time, high-to-low-level output from clear CL = 15 pF, RL = 400 Ω 18 27 ns tPLH Propagation delay time, low-to-high-level output from clock RL = 400 Ω, See Note 3 17 27 ns tPHL Propagation delay time, high-to-low-level output from clock See Note 3 18 27 ns NOTE 3: Load circuits and voltage waveforms are shown in Section 1. absolute maximum ratings over operating free-air temperature range (unless otherwise noted) Supply voltage, VCC (see Note 1) 7 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Input voltage 7 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Operating free-air temperature range, TA: SN54LS273 – 55 °C to 125°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SN74LS273 0 °C to 70°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Storage temperature range – 65 °C to 150°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . NOTE 1: Voltage values are with respect to network ground terminal. recommended operating conditions SN54LS273 SN74LS273 UNIT MIN NOM MAX MIN NOM MAX UNIT Supply voltage, VCC 4.5 5 5.5 4.75 5 5.25 V High-level output current, IOH – 400 – 400 µA Low-level output current, IOL 4 8 mA Clock frequency, fclock 0 30 0 30 MHz Width of clock or clear pulse, tw 20 20 ns Setup time t Data input 20 ↑ 20 ↑ ns Setup time, tsu Clear inactive state 25 ↑ 25 ↑ ns Data hold time, th 5 ↑ 5 ↑ ns Operating free-air temperature, TA –55 125 0 70 °C ↑ The arrow indicates that the rising edge of the clock pulse is used for reference. |
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