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TL16C554IPN 数据表(PDF) 7 Page - Texas Instruments

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部件名 TL16C554IPN
功能描述  ASYNCHRONOUS COMMUNICATIONS ELEMENT
Download  33 Pages
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制造商  TI [Texas Instruments]
网页  http://www.ti.com
标志 TI - Texas Instruments

TL16C554IPN 数据表(HTML) 7 Page - Texas Instruments

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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.


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