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SN74F161 Folha de dados(PDF) 7 Page - Texas Instruments |
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SN74F161 Folha de dados(HTML) 7 Page - Texas Instruments |
7 / 9 page SN74F161A SYNCHRONOUS 4-BIT BINARY COUNTER SDFS056A – D2932, MARCH 1987 – REVISED OCTOBER 1993 2–7 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 timing requirements over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted) VCC = 5 V, TA = 25°C MIN MAX UNIT MIN MAX fclock Clock frequency 0 100 0 90 MHz CLK high or low (loading) 5 5 t Pulse duration CLK (counting) High 4 4 ns tw Pulse duration CLK (counting) Low 6 7 ns CLR low 5 5 Data before CLK ↑ High or low 5 5 LOAD before CLK ↑ High 11 11.5 tsu Setup time LOAD before CLK ↑ Low 8.5 9.5 ns ENP and ENT before CLK ↑ High 11 11.5 ENP and ENT before CLK ↑ Low 5 5 Data after CLK ↑ High or low 2 2 th Hold time LOAD after CLK ↑ High 2 2 ns th Hold time LOAD after CLK ↑ Low 0 0 ns ENP and ENT after CLK ↑ High or low 0 0 tsu Inactive-state setup time, CLR high before CLK ↑† 6 6 ns † Inactive-state state setup time is also referred to as recovery time. switching characteristics (see Note 2) PARAMETER FROM (INPUT) TO (OUTPUT) VCC = 5 V, CL = 50 pF, RL = 500 Ω, TA = 25°C VCC = 4.5 V to 5.5 V, CL = 50 pF, RL = 500 Ω, TA = MIN to MAX‡ UNIT MIN TYP MAX MIN MAX fmax 100 120 90 MHz tPLH CLK (LOAD high) Any Q 2.7 5.1 7.5 2.7 8.5 ns tPHL CLK (LOAD high) Any Q 2.7 7.1 10 2.7 11 ns tPLH CLK (LOAD low) Any Q 3.2 5.6 8.5 3.2 9.5 ns tPHL CLK (LOAD low) Any Q 3.2 5.6 8.5 3.2 9.5 ns tPLH CLK RCO 4.2 9.6 14 4.2 15 ns tPHL CLK RCO 4.2 9.6 14 4.2 15 ns tPLH ENT RCO 1.7 4.1 7.5 1.7 8.5 ns tPHL ENT RCO 1.7 4.1 7.5 1.7 8.5 ns tPHL CLR Any Q 4.7 8.6 12 4.7 13 ns tPHL CLR RCO 3.7 7.6 10.5 3.7 11.5 ns ‡ For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions. NOTE 2: Load circuits and waveforms are shown in Section 1. |
Nº de peça semelhante - SN74F161 |
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Descrição semelhante - SN74F161 |
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