ADM485

Features: ` Meets EIA RS-485 Standard` 5 Mb/s Data Rate` Single +5 V Supply` 7 V to +12 V Bus Common-Mode Range` High Speed, Low Power BiCMOS` Thermal Shutdown Protection` Short Circuit Protection` Zero Skew Driver` Driver Propagation Delay: 10 ns` Receiver Propagation Delay: 25 ns` High Z Outputs...

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ADM485 Picture
SeekIC No. : 004275842 Detail

ADM485: Features: ` Meets EIA RS-485 Standard` 5 Mb/s Data Rate` Single +5 V Supply` 7 V to +12 V Bus Common-Mode Range` High Speed, Low Power BiCMOS` Thermal Shutdown Protection` Short Circuit Protection` ...

floor Price/Ceiling Price

Part Number:
ADM485
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/3/28

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Product Details

Description



Features:

` Meets EIA RS-485 Standard
` 5 Mb/s Data Rate
` Single +5 V Supply
` 7 V to +12 V Bus Common-Mode Range
` High Speed, Low Power BiCMOS
` Thermal Shutdown Protection
` Short Circuit Protection
` Zero Skew Driver
` Driver Propagation Delay: 10 ns
` Receiver Propagation Delay: 25 ns
` High Z Outputs with Power Off
` Superior Upgrade for LTC485





Application

· Low Power RS-485 Systems
· DTE-DCE Interface
· Packet Switching
· Local Area Networks
· Data Concentration
· Data Multiplexers
· Integrated Services Digital Network (ISDN)





Pinout

ADM485 Diagram




Specifications

# of Nodes On Bus 32
Drvr/Rcvr Enable Yes
Fail Safe Open
Isolation V (rms) ---
Available Packages DIP,SOIC,SOP
ESD-Protection ---
Pwr Supply (Vnom) +5
Data Rate 5Mbps
Full-Half Duplex Half





Description

The ADM485 is a differential line transceiver suitable for high speed bidirectional data communication on multipoint bus transmission lines. ADM485 is designed for balanced data transmission and complies with both EIA Standards RS-485 and RS-422. The part contains a differential line driver and a differential line receiver. Both the driver and the receiver may be enabled independently. When disabled, the outputs are tristated.

The ADM485 operates from a single +5 V power supply. Excessive power dissipation caused by bus contention or by output shorting is prevented by a thermal shutdown circuit. This feature forces the driver output into a high impedance state if during fault conditions a significant temperature increase is detected in the internal driver circuitry.

Up to 32 transceivers may be connected simultaneously on a bus, but only one driver should be enabled at any time. It is important, therefore, that the remaining disabled drivers do not load the bus. To ensure this, the ADM485 driver features high output impedance when disabled and also when powered down.

ADM485 minimizes the loading effect when the transceiver is not being utilized. The high impedance driver output is maintained over the entire common-mode voltage range from 7 V to +12 V.

The ADM485 receiver contains a fail safe feature which results in a logic high output state if the inputs are unconnected (floating).

The ADM485 is fabricated on BiCMOS, an advanced mixed technology process combining low power CMOS with fast switching bipolar technology. All inputs and outputs contain protection against ESD; all driver outputs feature high source and sink current capability. An epitaxial layer is used to guard against latch-up.

The ADM485 features extremely fast switching speeds. Minimal driver propagation delays permit transmission at data rates up to 5 Mbits/s while low skew minimizes EMI interference.

The part of ADM485 is fully specified over the commercial and industrial temperature range and is available in an 8-lead DIL/SOIC package.






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