TL16C552A, TL16C552AM
DUAL ASYNCHRONOUS COMMUNICATIONS ELEMENT
WITH FIFO
SLLS189D – NOVEMBER 1994 – REVISED JANUARY 1999
read cycle timing requirements over recommended ranges of operating free-air temperature and
supply voltage (see Note 4 and Figure 4)
MIN
80
MAX
UNIT
ns
t
t
t
t
t
t
t
Pulse duration, IOR ↓
w4
su1
su2
h1
Setup time, CSx valid before IOR ↓ (see Note 5)
Setup time, A2–A0 valid before IOR ↓ (see Note 5)
Hold time, A2–A0 valid after IOR ↑ (see Note 5)
Hold time, CSx valid after IOR ↑ (see Note 5)
15
ns
15
ns
20
ns
20
ns
h2
Delay time, t
+ t
+ t (see Note 6)
175
80
ns
d1
su2 w4 d2
Delay time, IOR ↑ to IOR or IOW ↓
ns
d2
NOTES: 4. These parameters are not production tested.
5. The internal address strobe is always active.
6. In FIFO mode, t = 425 ns (min) between reads of the receiver FIFO and the status registers (interrupt identification register and
d1
line status register).
write cycle timing requirements over recommended ranges of operating free-air temperature and
supply voltage (see Note 7 and Figure 5)
MIN
80
MAX
UNIT
ns
t
t
t
t
t
t
t
t
t
Pulse duration, IOW ↓
w5
su4
su5
su6
h3
Setup time, CSx valid before IOW ↓ (see Note 8)
Setup time, A2–A0 valid before IOW ↓ (see Note 8)
Setup time, DB0–DB7 valid before IOW ↑
Hold time, A2–A0 valid after IOW ↑ (see Note 8)
Hold time, CSx valid after IOW ↑ (see Note 8)
Hold time, DB0–DB7 valid after IOW ↑
15
ns
15
ns
15
ns
20
ns
20
ns
h4
15
ns
h5
Delay time, t
+ t
+ t
175
80
ns
d3
su5 w5 d4
Delay time, IOW ↑ to IOW or IOR ↓
ns
d4
NOTES: 7. These parameters are not production tested.
8. The internal address strobe is always active.
read cycle switching characteristics over recommended ranges of operating free-air temperature
and supply voltage, C = 100 pF (see Note 9 and Figure 4)
L
PARAMETER
MIN
MAX
60
UNIT
ns
t
t
t
Propagation delay time from IOR ↓ to BDO ↑ or from IOR ↑ to BDO ↓
Enable time from IOR ↓ to DB0–DB7 valid (see Note 10)
Disable time from IOR ↑ to DB0–DB7 released (see Note 10)
pd1
60
ns
en
60
ns
dis
NOTES: 9. These parameters are not production tested.
10.
V
OL
and V
(and the external loading) determine the charge and discharge time.
OH
8
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