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參數資料
型號: ADM485JN
廠商: ANALOG DEVICES INC
元件分類: 通用總線功能
英文描述: +5 V Low Power EIA RS-485 Transceiver
中文描述: LINE TRANSCEIVER, PDIP8
封裝: MO-095AA, PLASTIC, DIP-8
文件頁數: 3/8頁
文件大小: 133K
代理商: ADM485JN
ADM485
REV. A
–3–
ABSOLUTE MAXIMUM RATINGS*
(T
A
= +25
°
C unless otherwise noted)
V
CC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +7 V
Inputs
Driver Input (DI) . . . . . . . . . . . . . . . . –0.3 V to V
CC
+ 0.3 V
Control Inputs (DE, RE) . . . . . . . . . . –0.3 V to V
CC
+ 0.3 V
Receiver Inputs (A, B) . . . . . . . . . . . . . . . . . –14 V to +14 V
Outputs
Driver Outputs . . . . . . . . . . . . . . . . . . . . . . . –14 V to +14 V
Receiver Output . . . . . . . . . . . . . . . . . –0.5 V to V
CC
+0.5 V
Power Dissipation 8-Pin DIP . . . . . . . . . . . . . . . . . . . 500 mW
θ
JA
, Thermal Impedance . . . . . . . . . . . . . . . . . . +130
°
C/W
Power Dissipation 8-Pin SOIC . . . . . . . . . . . . . . . . . 450 mW
θ
JA
, Thermal Impedance . . . . . . . . . . . . . . . . . . +170
°
C/W
Power Dissipation 8-Pin Cerdip . . . . . . . . . . . . . . . . 500 mW
θ
JA
, Thermal Impedance . . . . . . . . . . . . . . . . . . +125
°
C/W
Operating Temperature Range
Commercial (J Version) . . . . . . . . . . . . . . . . . 0
°
C to +70
°
C
Industrial (A Version) . . . . . . . . . . . . . . . . –40
°
C to +85
°
C
Storage Temperature Range . . . . . . . . . . . –65
°
C to +150
°
C
Lead Temperature (Soldering, 10 sec) . . . . . . . . . . . . +300
°
C
Vapour Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . . . +215
°
C
Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . . . +220
°
C
*Stresses above those listed under Absolute Maximum Ratings may cause perma-
nent damage to the device. This is a stress rating only; functional operation of the
device at these or any other conditions above those indicated in the operational
sections of this specification is not implied. Exposure to absolute maximum ratings
for extended periods may affect device reliability.
Table I. Transmitting
INPUTS
DE
OUTPUT
B
RE
DI
A
X
X
X
1
1
0
1
0
X
0
1
Z
1
0
Z
Table II. Receiving
INPUTS
DE
OUTPUT
RO
RE
A-B
0
0
0
1
0
0
0
0
+0.2 V
–0.2 V
Inputs Open
X
1
0
1
Z
PIN FUNCTION DESCRIPTION
Pin Mnemonic Function
1
RO
Receiver Output. When enabled if A > B by
200 mV, then RO = High. If A < B by
200 mV, then RO = Low.
Receiver Output Enable. A low level enables
the receiver output, RO. A high level places it
in a high impedance state.
Driver Output Enable. A high level enables
the driver differential outputs, A and B. A
low level places it in a high impedance state.
Driver Input. When the driver is enabled a
logic Low on DI forces A low and B high
while a logic High on DI forces A high and B
low.
Ground Connection, 0 V.
Noninverting Receiver Input A/Driver
Output A.
Inverting Receiver Input B/Driver Output B.
Power Supply, 5 V
±
5%.
2
RE
3
DE
4
DI
5
6
GND
A
7
8
B
V
CC
PIN CONFIGURATION
RO
RE
DE
DI
GND
A
B
V
CC
1
2
3
4
8
7
6
5
TOP VIEW
(Not to Scale)
ADM485
ORDERING GUIDE
Model
Temperature Range
Package Option
ADM485JN
ADM485JR
ADM485AN
ADM485AR
ADM485AQ
0
°
C to +70
°
C
0
°
C to +70
°
C
–40
°
C to +85
°
C
–40
°
C to +85
°
C
–40
°
C to +85
°
C
N-8
SO-8
N-8
SO-8
Q-8
CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily
accumulate on the human body and test equipment and can discharge without detection. Although
the ADM485 features proprietary ESD protection circuitry, permanent damage may occur on
devices subjected to high-energy electrostatic discharges. Therefore, proper ESD precautions are
recommended to avoid performance degradation or loss of functionality.
WARNING!
ESD SENSITIVE DEVICE
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相關代理商/技術參數
參數描述
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