參數(shù)資料
型號(hào): MAX4838
廠商: Maxim Integrated Products, Inc.
英文描述: Overvoltage Protection Controllers with Status FLAG
中文描述: 過壓保護(hù)控制器,帶有狀態(tài)標(biāo)示FLAG
文件頁數(shù): 10/19頁
文件大?。?/td> 439K
代理商: MAX4838
M
Low-Power, Slew-Rate-Limited
RS-485/RS-422 Transceivers
10
______________________________________________________________________________________
_______________________________________________________Switching Waveforms
DI
3V
0V
Z
Y
V
O
0V
-V
O
V
O
1.5V
t
PLH
1/2 V
O
10%
t
R
90%
90%
t
PHL
1.5V
1/2 V
O
10%
t
F
V
DIFF
= V (Y) - V (Z)
V
DIFF
t
SKEW =
| t
PLH
- t
PHL
|
OUTPUT NORMALLY LOW
OUTPUT NORMALLY HIGH
3V
0V
Y, Z
V
OL
Y, Z
0V
1.5V
1.5V
V
OL
+0.5V
V
OH
-0.5V
2.3V
2.3V
t
ZL(SHDN)
, t
ZL
t
LZ
t
ZH(SHDN)
, t
ZH
t
HZ
DE
V
OH
V
OL
V
ID
-V
ID
1.5V
0V
1.5V
OUTPUT
INPUT
0V
RO
A-B
t
PLH
t
PHL
OUTPUT NORMALLY LOW
OUTPUT NORMALLY HIGH
3V
0V
V
CC
RO
RO
0V
1.5V
1.5V
V
OL
+ 0.5V
V
OH
- 0.5V
1.5V
1.5V
t
ZL(SHDN)
, t
ZL
t
LZ
t
ZH(SHDN)
, t
ZH
t
HZ
RE
_________________Function Tables
(MAX481/MAX483/MAX485/MAX487/MAX1487)
Figure 8. Driver Propagation Delays
Figure 9. Driver Enable and Disable Times (except MAX488 and
MAX490)
Figure 10. Receiver Propagation Delays
Figure 11. Receiver Enable and Disable Times (except MAX488
and MAX490)
Table 1. Transmitting
Table 2. Receiving
INPUTS
OUTPUT
RE
DE
A-B
RO
0
0
0
1
0
0
0
0
> +0.2V
< -0.2V
Inputs open
X
1
0
1
High-Z
*
X = Don't care
High-Z = High impedance
*
Shutdown mode for MAX481/MAX483/MAX487
INPUTS
OUTPUTS
RE
DE
DI
Z
Y
X
X
0
1
1
1
0
0
1
0
X
X
0
1
High-Z
High-Z
*
1
0
High-Z
High-Z
*
X = Don't care
High-Z = High impedance
*
Shutdown mode for MAX481/MAX483/MAX487
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