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SN74ACT2236-40FN Fiches technique(PDF) 10 Page - Texas Instruments |
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SN74ACT2236-40FN Fiches technique(HTML) 10 Page - Texas Instruments |
10 / 14 page SN74ACT2236 1024 × 9 × 2 ASYNCHRONOUS BIDIRECTIONAL FIRST IN, FIRST OUT MEMORY SCAS149A − APRIL 1990 − REVISED SEPTEMBER 1995 10 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443 operating characteristics, VCC = 5 V, TA = 25°C PARAMETER TEST CONDITIONS TYP UNIT Cpd Power dissipation capacitance per 1K bits Outputs enabled CL = 50 pF, f = 5 MHz 71 pF Cpd Power dissipation capacitance per 1K bits Outputs disabled CL = 50 pF, f = 5 MHz 57 pF TYPICAL CHARACTERISTICS PROPAGATION DELAY TIME vs LOAD CAPACITANCE 0 50 100 200 250 150 300 typ − 2 CL − Load Capacitance − pF typ typ + 2 typ + 4 typ + 6 typ + 8 VCC = 5 V TA = 25°C RL = 500 Ω 4.5 4.6 4.7 4.8 4.9 5 5.1 5.2 5.3 5.4 5.5 typ + 2 typ + 1 typ typ − 1 typ − 2 POWER DISSIPATION CAPACITANCE vs SUPPLY VOLTAGE VCC − Supply Voltage − V VCC = 5 V fi = 5 MHz TA = 25°C typ − 3 Figure 2 Figure 3 calculating power dissipation The maximum power dissipation (PT) can be calculated by: PT = VCC × [ICC + (N × ∆ICC × dc)] + Σ(Cpd × VCC2 × fi) + Σ(CL × VCC2 × fo) where: ICC = power-down ICC maximum N = number of inputs driven by a TTL device ∆ICC = increase in supply current dc = duty cycle of inputs at a TTL high level of 3.4 V Cpd = power dissipation capacitance CL = output capacitive load fi = data input frequency fo = data output frequency |
Numéro de pièce similaire - SN74ACT2236-40FN |
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Description similaire - SN74ACT2236-40FN |
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