DS481_14 Datasheet, PDF (1/17 Pages) Texas Instruments – Low Power RS-485/RS-422 Multipoint Transceiver with Sleep Mode

DS481
www.ti.com
SNLS131B – JULY 2000 – REVISED MARCH 2013
DS481 Low Power RS-485/RS-422 Multipoint Transceiver with Sleep Mode
Check for Samples: DS481
FEATURES
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•2 Meets TIA/EIA RS-485 Multipoint Standard
• Sleep Mode Reduces I_CC to 0.2 μA
• Guaranteed Full Load Output Voltage (V_OD3)
• Low Quiescent Current: 200 μA typ
• −7V to +12V Common-mode Input Voltage
Range
• TRI-STATE Outputs on Driver and Receiver
• AC Performance:
– Driver Transition Time: 25 ns typ
– Driver Propagation Delay: 40 ns typ
– Driver Skew: 1 ns typ
– Receiver Propagation Delay: 200 ns typ
– Receiver Skew: 20 ns typ
• Half-duplex Flow Through Pinout
• Operates From a Single 5V Supply
• Allows up to 64 Transceivers on the Bus
• Current-limiting and Thermal Shutdown for
Driver Overload Protection
• Industrial Temperature Range Operation
• Pin and Functional Compatible with MAX481C
and MAX481E
DESCRIPTION
The DS481 is a low-power transceiver for RS-485
and RS-422 communication. The device contains one
driver and one receiver. The drivers slew rate allows
for operation up to 2.0 Mbps (see Applications
Information).
The transceiver draws 200 μA of supply current when
unloaded or 0.2 μA when in the automatic sleep
mode. Sleep mode is activated by inactivity on the
enables (DE and RE⁽¹⁾). Holding DE =L and RE⁽¹⁾ =H
for greater than 600 ns will enable the sleep mode.
The DS481 operates from a single +5V supply.
The driver is short-circuit current limited and is
protected against excessive power dissipation by
thermal shutdown circuitry that places the driver
outputs into TRI-STATE (High Impedance state)
under fault conditions. The driver guarantees a
minimum of 1.5V differential output voltage with
maximum loading across the common mode range
(V_OD3).
The receiver has a failsafe feature that guarantees a
logic-high output if the input is open circuit.
The DS481 is available in a surface mount package
and is characterized for Industrial temperature range
operation.
(1) Non Terminated, Open Input only
Connection and Logic Diagram
*Non Terminated, Open Input only
Figure 1. SOIC Package
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PRODUCTION DATA information is current as of publication date.
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Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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