DS481

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SNLS131B – JULY 2000 – REVISED MARCH 2013

DS481 Low Power RS-485/RS-422 Multipoint Transceiver with Sleep Mode

Check for Samples: DS481

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FEATURES

DESCRIPTION

The DS481 is a low-power transceiver for RS-485

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•

Meets TIA/EIA RS-485 Multipoint Standard

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).

•

Low Quiescent Current: 200

μA typ

•

−7V to +12V Common-mode Input Voltage

The transceiver draws 200

μA of supply current when

unloaded or 0.2

μA when in the automatic sleep

Range

mode. Sleep mode is activated by inactivity on the

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TRI-STATE Outputs on Driver and Receiver

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AC Performance:

for greater than 600 ns will enable the sleep mode.

–

Driver Transition Time: 25 ns typ

The DS481 operates from a single +5V supply.

–

Driver Propagation Delay: 40 ns typ

The driver is short-circuit current limited and is

protected against excessive power dissipation by

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Driver Skew: 1 ns typ

thermal shutdown circuitry that places the driver

–

Receiver Propagation Delay: 200 ns typ

outputs into TRI-STATE (High Impedance state)

–

Receiver Skew: 20 ns typ

under fault conditions. The driver guarantees a

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Half-duplex Flow Through Pinout

minimum of 1.5V differential output voltage with

maximum loading across the common mode range

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Operates From a Single 5V Supply

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Allows up to 64 Transceivers on the Bus

The receiver has a failsafe feature that guarantees a

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Current-limiting and Thermal Shutdown for

logic-high output if the input is open circuit.

Driver Overload Protection

The DS481 is available in a surface mount package

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Industrial Temperature Range Operation

and is characterized for Industrial temperature range

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Pin and Functional Compatible with MAX481C

operation.

and MAX481E

(1)

Non Terminated, Open Input only

Connection and Logic Diagram

*Non Terminated, Open Input only

Figure 1. SOIC Package

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Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.