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SN74ALS236FN Arkusz danych(PDF) 8 Page - Texas Instruments |
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SN74ALS236FN Arkusz danych(HTML) 8 Page - Texas Instruments |
8 / 11 page SN74ALS236 64 × 4 ASYNCHRONOUS FIRST-IN, FIRST-OUT MEMORY SDAS107C – OCTOBER 1986 – REVISED APRIL 1998 8 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 switching characteristics (see Figure 5) PARAMETER FROM TO MIN TYP† MAX MIN MAX UNIT PARAMETER (INPUT) (OUTPUT) MIN TYP† MAX MIN MAX UNIT f SI 35 30 MHz fmax SO 35 30 MHz tw‡ IR high 15 8 ns tw§ OR high 19 8 ns td(QV-ORH) Q valid before OR ↑ 6 9 –5 12 ns td(SOL-QX) Q valid after SO ↓ 13 4 ns tpd SI ↓ Q 600 800 350 1000 ns tPHL SI ↑ IR 20 26 8 30 ns tPLH SI ↓ IR 16 21 6 25 ns tPLH¶ SI ↓ OR 600 800 350 1000 ns tpd SO ↓ Q 13 17 4 22 ns tPHL SO ↑ OR 23 27 7 33 ns tPLH SO ↓ OR 20 24 6 30 ns tPLH¶ SO ↓ IR 600 800 350 1000 ns tPHL RST ↓ OR 22 26 10 34 ns tPLH RST ↓ IR 17 21 6 27 ns tPHL RST ↓ Q 14 14 17 5 19 ns † All typical values are at VCC = 5 V, TA = 25°C. ‡ The IR output pulse occurs when the FIFO is full, SI is high, and SO is pulsed (see Figure 4). § The OR output pulse occurs when the FIFO is empty, SO is high, and SI is pulsed (see Figure 3). ¶ Data throughput or fall-through times |
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