參數(shù)資料
型號(hào): ADM3488
廠商: Analog Devices, Inc.
英文描述: 3.3 V Slew Rate Limited, Half- and Full-Duplex, RS-485/RS-422 Transceivers
中文描述: 3.3伏擺率限制,半和全雙工,RS-485/RS-422收發(fā)器
文件頁(yè)數(shù): 6/20頁(yè)
文件大小: 315K
代理商: ADM3488
ADM3483/ADM3485/ADM3488/ADM3490/ADM3491
TIMING SPECIFICATIONS—ADM3483/ADM3485/ADM3488/ADM3490/ADM3491
V
CC
= 3.3 V, T
A
= 25°C, unless otherwise noted.
Rev. B | Page 6 of 20
Table 5.
Parameter
RECEIVER
Time to Shutdown (t
SHDN
)
ADM3483/ADM3485/ADM3491
1
Propagation Delay, Low-to-High Level (t
RPLH
)
ADM3485/ADM3490/ADM3491
ADM3483/ADM3488
Propagation Delay, High-to-Low Level (t
RPHL
)
ADM3485/ADM3490/ADM3491
ADM3483/ADM3488
|t
PLH
– t
PHL
| Propagation Delay Skew (t
RPDS
)
ADM3485/ADM3490/ADM3491
ADM3483/ADM3488
RECEIVER OUTPUT ENABLE/DISABLE TIMES
(ADM3483/ADM3485/ADM3491 ONLY)
Output Enable Time to Low Level (t
PRZL
)
Output Enable Time to High Level (t
PRZH
)
Output Disable Time from High Level (t
PRHZ
)
Output Disable Time from Low Level (t
PRLZ
)
Output Enable Time from Shutdown to
Low Level (t
PRSL
)
Output Enable Time from Shutdown to
High Level (t
PRSH
)
1
The transceivers are put into shutdown by bringing the RE high and DE low. If the inputs are in this state for less than 80 ns, the parts are guaranteed not to enter
shutdown. If the parts are in this state for 300 ns or more, the parts are guaranteed to enter shutdown.
Min
80
25
25
25
25
Typ
190
65
75
65
75
Max
300
90
120
90
120
10
20
Unit
ns
ns
ns
ns
ns
ns
ns
Test Conditions/Comments
V
ID
= 0 V to 3.0 V, C
L
= 15 pF (see Figure 14 and Figure 20)
V
ID
= 0 V to 3.0 V, C
L
= 15 pF (see Figure 14 and Figure 20)
V
ID
= 0 V to 3.0 V, C
L
= 15 pF (see Figure 14 and Figure 20)
25
25
25
25
720
50
50
45
45
1400
ns
ns
ns
ns
ns
C
L
= 15 pF (see Figure 15 and Figure 21)
C
L
= 15 pF (see Figure 15 and Figure 21)
C
L
= 15 pF (see Figure 15 and Figure 21)
C
L
= 15 pF (see Figure 15 and Figure 21)
C
L
= 15 pF (see Figure 15 and Figure 21)
720
1400
ns
C
L
= 15 pF (see Figure 15 and Figure 21)
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