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ST491ACD 数据表(PDF) 1 Page - STMicroelectronics

部件名 ST491ACD
功能描述  LOW POWER HIGH SPEED RS-485/RS-422 TRANSCEIVER
Download  12 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

ST491ACD 数据表(HTML) 1 Page - STMicroelectronics

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July 2003
s
LOW SUPPLY CURRENT: 5mA MAX
s
DESIGNED FOR RS485 INTERFACE
APPLICATIONS
s
-7 TO 12 COMMON MODE INPUT VOLTAGE
RANGE
s
70mV TYPICAL INPUT HYSTERESIS
s
DESIGNED FOR 25Mbps OPERATION
s
OPERATE FROM SINGLE 5 SUPPLY
s
±4kV ESD PROTECTION
s
CURRENT LIMITING AND THERMAL
SHUTDOWN FOR DRIVER OVERLOAD
PROTECTION
DESCRIPTION
The ST491A is a low power transceiver for
RS-485 and RS-422 communications. The device
contains one driver and one receiver in full duplex
configuration. The ST491A draws 5mA (typ.) of
supply current when unloaded and operates from
a single 5V supply.
Driver is short-circuit current limited and is
protected against excessive power dissipation by
thermal shutdown circuitry that place the driver
outputs into a high-impedance state. The receiver
input has a fail-safe feature that guarantees a
logic high output if both inputs are open circuit.
ORDERING CODES
Type
Temperature
Range
Package
Comments
ST491ACN
0 to 70 °C
DIP-14
25parts per tube / 40tube per box
ST491ABN
-40 to 85 °C
DIP-14
25parts per tube / 40tube per box
ST491ACD
0 to 70 °C
SO-14 (Tube)
50parts per tube / 20tube per box
ST491ABD
-40 to 85 °C
SO-14 (Tube)
50parts per tube / 20tube per box
ST491ACDR
0 to 70 °C
SO-14 (Tape & Reel)
2500 parts per reel
ST491ABDR
-40 to 85 °C
SO-14 (Tape & Reel)
2500 parts per reel
ST491A
LOW POWER HIGH SPEED RS-485/RS-422 TRANSCEIVER
DIP
SOP


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