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74ACT16821 Datasheet(PDF) 4 Page - Texas Instruments |
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74ACT16821 Datasheet(HTML) 4 Page - Texas Instruments |
4 / 9 page 54ACT16821, 74ACT16821 20BIT BUSINTERFACE FLIPFLOPS WITH 3STATE OUTPUTS SCAS176A − JANUARY 1991 − REVISED APRIL 1996 4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443 recommended operating conditions (see Note 3) 54ACT16821 74ACT16821 UNIT MIN NOM MAX MIN NOM MAX UNIT VCC Supply voltage 4.5 5 5.5 4.5 5 5.5 V VIH High-level input voltage 2 2 V VIL Low-level input voltage 0.8 0.8 V VI Input voltage 0 VCC 0 VCC V VO Output voltage 0 VCC 0 VCC V IOH High-level output current −24 −24 mA IOL Low-level output current 24 24 mA ∆t/∆v Input transition rise or fall rate 0 10 0 10 ns/V TA Operating free-air temperature −55 125 −40 85 °C NOTE 3: Unused inputs must be held high or low to prevent them from floating. electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS VCC TA = 25°C 54ACT16821 74ACT16821 UNIT PARAMETER TEST CONDITIONS VCC MIN TYP MAX MIN MAX MIN MAX UNIT IOH = −50 A 4.5 V 4.4 4.4 4.4 IOH = −50 µA 5.5 V 5.4 5.4 5.4 VOH IOH = −24 mA 4.5 V 3.94 3.8 3.8 V VOH IOH = −24 mA 5.5 V 4.94 4.8 4.8 V IOH = −75 mA† 5.5 V 3.85 3.85 IOL = 50 A 4.5 V 0.1 0.1 0.1 IOL = 50 µA 5.5 V 0.1 0.1 0.1 VOL IOL = 24 mA 4.5 V 0.36 0.44 0.44 V VOL IOL = 24 mA 5.5 V 0.36 0.44 0.44 V IOL = 75 mA† 5.5 V 1.65 1.65 II VI = VCC or GND 5.5 V ±0.1 ±1 ±1 µA IOZ VO = VCC or GND 5.5 V ±0.5 ±5 ±5 µA ICC VI = VCC or GND, IO = 0 5.5 V 8 80 80 µA ∆ICC‡ One input at 3.4 V, Other inputs at VCC or GND 5.5 V 0.9 1 1 mA Ci VI = VCC or GND 5 V 3 pF Ci VO = VCC or GND 5 V 11 pF † Not more than one output should be tested at a time, and the duration of the test should not exceed 10 ms. ‡ This is the increase in supply current for each input that is at one of the specified TTL voltage levels rather than 0 V or VCC. timing requirements over recommended operating free-air temperature range, VCC = 5 V ± 0.5 V (unless otherwise noted) (see Figure 1) TA = 25°C 54ACT16821 74ACT16821 UNIT MIN MAX MIN MAX MIN MAX UNIT fclock Clock frequency 0 70 0 70 0 70 MHz tw Pulse duration, CLK high or low 7 7 7 ns tsu Setup time, data before CLK ↑ 7.5 7.5 7.5 ns th Hold time, data after CLK ↑ 0.5 0.5 0.5 ns PRODUCT PREVIEW information concerns products in the formative or design phase of development. Characteristic data and other specifications are design goals. Texas Instruments reserves the right to change or discontinue these products without notice. |
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