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參數(shù)資料
| 型號(hào)： | MAX491 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | 【15kV ESD-Protected, Slew-Rate-Limited, Low-Power, RS-485/RS-422 Transceivers |
| 中文描述： | 低功耗、限擺率、RS-485/RS-422收發(fā)器 |
| 文件頁(yè)數(shù)： | 2/16頁(yè) |
| 文件大?。?/td> | 133K |
| 代理商： | MAX491 |
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M
±15kV ES D-Protec ted, S lew-Rate-Limited,
Low-Power, RS -485/RS -422 Transc eivers
2
_______________________________________________________________________________________
CC
).............................................................12V
Supply Voltage (V
CC
+ 0.5V)
Driver Input Voltage (DI).............................-0.5V to (V
CC
+ 0.5V)
Driver Output Voltage (Y, Z; A, B) ..........................-8V to +12.5V
Receiver Input Voltage (A, B).................................-8V to +12.5V
Receiver Output Voltage (RO)....................-0.5V to (V
CC
+ 0.5V)
Continuous Power Dissipation (T
A
= +70°C)
8-Pin Plastic DIP (derate 9.09mW/°C above +70°C) ....727mW
14-Pin Plastic DIP (derate 10.00mW/°C above +70°C)..800mW
8-Pin SO (derate 5.88mW/°C above +70°C).................471mW
14-Pin SO (derate 8.33mW/°C above +70°C)...............667mW
Operating Temperature Ranges
MAX4_ _C_ _/MAX1487EC_ A .............................0°C to +70°C
MAX4_ _E_ _/MAX1487EE_ A...........................-40°C to +85°C
Storage Temperature Range.............................-65°C to +160°C
Lead Temperature (soldering, 10sec) .............................+300°C
DC ELECTRICAL CHARACTERISTICS
(V
CC
= 5V ±5%, T
A
= T
MIN
to T
MAX
, unless otherwise noted.) (Notes 1, 2)
PARAMETER
SYMBOL
Differential Driver Output (no load)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ABSOLUTE MAXIMUM RATINGS
MIN
TYP
MAX
5
UNITS
V
Driver Common-Mode Output
Voltage
Change in Magnitude of Driver
Common-Mode Output Voltage
for Complementary Output States
Input High Voltage
Input Low Voltage
Input Current
V
OC
3
V
Change in Magnitude of Driver
Differential Output Voltage for
Complementary Output States
V
OD
0.2
V
V
OD
0.2
V
V
IH
V
IL
I
IN1
2.0
V
V
0.8
±2
μA
V
OD1
2
V
Differential Driver Output
(with load)
V
OD2
1.5
5
1.0
-0.8
mA
0.25
-0.2
mA
Receiver Differential Threshold
Voltage
Receiver Input Hysteresis
Receiver Output High Voltage
Receiver Output Low Voltage
-0.2
0.2
V
V
TH
V
OH
V
OL
70
mV
V
V
3.5
0.4
Three-State (high impedance)
Output Current at Receiver
I
OZR
±1
μA
12
k
CONDITIONS
DE = 0V;
V
CC
= 0V or 5.25V,
all devices except
MAX487E/MAX1487E
R = 27
or 50
, Figure 8
R = 27
or 50
, Figure 8
R = 27
or 50
, Figure 8
DE, DI, –—
DE, DI, –—
DE, DI, –—
MAX487E/MAX1487E,
DE = 0V, V
CC
= 0V or 5.25V
-7V
≤
V
CM
≤
12V
V
CM
= 0V
I
O
= -4mA, V
ID
= 200mV
I
O
= 4mA, V
ID
= -200mV
R = 50
(RS-422)
R = 27
(RS-485), Figure 8
0.4V
≤
V
O
≤
2.4V
-7V
≤
V
CM
≤
12V, all devices except
MAX487E/MAX1487E
Receiver Input Resistance
R
IN
-7V
≤
V
CM
≤
12V, MAX487E/MAX1487E
48
k
V
TH
I
IN2
Input Current
(A, B)
V
IN
= 12V
V
IN
= -7V
V
IN
= 12V
V
IN
= -7V
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