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參數(shù)資料
| 型號(hào)： | MAX3291 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | 32-Bit Digital Signal Controller with Flash 128-LQFP -40 to 85 |
| 中文描述： | RS-485/RS-422收發(fā)器，帶有預(yù)加重，用于高速、遠(yuǎn)距離通信 |
| 文件頁(yè)數(shù)： | 9/16頁(yè) |
| 文件大小： | 285K |
| 代理商： | MAX3291 |
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INPUTS
M
RS-485/RS-422 Transceivers with Preemphasis
for High-Speed, Long-Distance Communication
_______________________________________________________________________________________
9
R
B
RO
C
L
ATE
A
V
ID
R
Z
N
Y
P
Z
P
Y
N
Z
N
Z
P
Y
P
Y
N
0 DIFFERENTIAL
t
PRE
t
PTND
80%
20%
50%
Figure 9. Receiver Propagation Delay Test Circuit
Figure 10. Preemphasis Timing
RE
DI
DE
1k
V
CC
RO
MAX3291
MAX3292
Figure 11. Time-to-Shutdown Test Circuit
Func tion Tables
DI
RE
DE
1
X
1
INPUTS
Z
0
OUTPUTS
Y
1
TRANSMITTING
1
0
0
X
1
High-Z
High-Z
High-Z and
SHUTDOWN
X
1
0
X
0
0
A-B
RE
DE
OUTPUT
RO
1
0
1
≤
-0.2V
Open
X
0
0
1
X
X
1
High-Z and
SHUTDOWN
X
1
0
≥
0.2V
0
X
X = Don’t care
Z = High impedance
SHUTDOWN = Low-power shutdown; driver and receiver outputs are high impedance.
INPUTS
RECEIVING
High-Z
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