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TL16C554IPN 数据表(PDF) 7 Page - Texas Instruments |
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TL16C554IPN 数据表(HTML) 7 Page - Texas Instruments |
7 / 33 page TL16C554, TL16C554I ASYNCHRONOUS COMMUNICATIONS ELEMENT SLLS165D – JANUARY 1994 – REVISED JULY 1998 7 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 read cycle timing requirements over recommended ranges of operating free-air temperature and supply voltage (see Figure 4) MIN MAX UNIT tw4 Pulse duration, IOR low 75 ns tsu1 Setup time, CSx valid before IOR low (see Note 2) 10 ns tsu2 Setup time, A2 – A0 valid before IOR low (see Note 2) 15 ns th1 Hold time, A2 – A0 valid after IOR high (see Note 2) 0 ns th2 Hold time, CSx valid after IOR high (see Note 2) 0 ns td1 Delay time, tsu2 + tw4 + td2 (see Note 3) 140 ns td2 Delay time, IOR high to IOR or IOW low 50 ns NOTES: 2. The internal address strobe is always active. 3. In the FIFO mode, td1 = 425 ns (min) between reads of the receiver FIFO and the status registers (interrupt identification register and line status register). write cycle timing requirements over recommended ranges of operating free-air temperature and supply voltage (see Figure 5) MIN MAX UNIT tw5 Pulse duration, IOW ↓ 50 ns tsu3 Setup time, CSx valid before IOW ↓ (see Note 2) 10 ns tsu4 Setup time, A2 – A0 valid before IOW ↓ (see Note 2) 15 ns tsu5 Setup time, D7 – D0 valid before IOW ↑ 10 ns th3 Hold time, A2 – A0 valid after IOW ↑ (see Note 2) 5 ns th4 Hold time, CSx valid after IOW ↑ (see Note 2) 5 ns th5 Hold time, D7 – D0 valid after IOW ↑ 25 ns td3 Delay time, tsu4 + tw5 + td4 120 ns td4 Delay time, IOW ↑ to IOW or IOR↓ 55 ns NOTE 2: The internal address strobe is always active. read cycle switching characteristics over recommended ranges of operating free-air temperature and supply voltage, CL = 100 pF (see Note 4 and Figure 4) PARAMETER MIN MAX UNIT ten Enable time, IOR ↓ to D7–D0 valid 30 ns tdis Disable time, IOR ↑ to D7–D0 released 0 20 ns NOTE 4: VOL and VOH (and the external loading) determine the charge and discharge time. |
类似零件编号 - TL16C554IPN |
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类似说明 - TL16C554IPN |
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