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DS485M/NOPB - Texas Instruments

Description: Low-Power RS-485/RS-422 Multipoint Transceiver

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DS485M/NOPB Details

  • Manufacturer Part Number:

    DS485M/NOPB

  • Brand Name:

    Texas Instruments

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Obsolete

  • Part Package Code:

    SOIC

  • Package Description:

    SOP-8

  • Pin Count:

    8

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.60

  • Manufacturer:

    Texas Instruments

  • YTEOL:

    0

  • Differential Output:

    YES

  • Driver Number of Bits:

    1

  • High Level Input Current-Max:

    0.000002 A

  • Input Characteristics:

    DIFFERENTIAL SCHMITT TRIGGER

  • Interface IC Type:

    LINE TRANSCEIVER

  • Interface Standard:

    EIA-422; EIA-485; TIA-485

  • JESD-30 Code:

    R-PDSO-G8

  • JESD-609 Code:

    e3

  • Length:

    4.9 mm

  • Moisture Sensitivity Level:

    1

  • Number of Functions:

    1

  • Number of Terminals:

    8

  • Operating Temperature-Max:

    70 °C

  • Out Swing-Min:

    1.5 V

  • Output Low Current-Max:

    0.004 A

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Code:

    SOP

  • Package Equivalence Code:

    SOP8,.25

  • Package Shape:

    RECTANGULAR

  • Package Style:

    SMALL OUTLINE

  • Peak Reflow Temperature (Cel):

    260

  • Qualification Status:

    Not Qualified

  • Receive Delay-Max:

    320 ns

  • Receiver Number of Bits:

    1

  • Seated Height-Max:

    1.75 mm

  • Supply Current-Max:

    0.9 mA

  • Supply Voltage-Max:

    5.25 V

  • Supply Voltage-Min:

    4.75 V

  • Supply Voltage-Nom:

    5 V

  • Surface Mount:

    YES

  • Technology:

    CMOS

  • Temperature Grade:

    COMMERCIAL

  • Terminal Finish:

    MATTE TIN

  • Terminal Form:

    GULL WING

  • Terminal Pitch:

    1.27 mm

  • Terminal Position:

    DUAL

  • Time@Peak Reflow Temperature-Max (s):

    30

  • Transmit Delay-Max:

    65 ns

  • Width:

    3.9 mm

DS485M/NOPB Frequently Asked Questions (FAQs)

  • The maximum cable length for the DS485M/NOPB is dependent on the baud rate and the type of cable used. As a general guideline, the maximum cable length is around 4000 feet (1219 meters) at 9600 bps, but this can be affected by factors such as cable quality, noise, and termination.
  • The DS485M/NOPB requires a 120-ohm termination resistor at each end of the bus to prevent signal reflections and ensure reliable data transmission. The termination resistors should be connected between the differential lines (A and B) and can be installed at the extreme ends of the bus.
  • The maximum number of nodes that can be connected to a DS485M/NOPB network is 32. This is because the DS485M/NOPB uses a 5-bit node address, which allows for up to 32 unique addresses.
  • Yes, the DS485M/NOPB can be used in a multi-drop configuration, where multiple nodes are connected to the same bus. However, the total number of nodes should not exceed 32, and each node should have a unique address.
  • The DS485M/NOPB does not have built-in error detection or correction capabilities. It is up to the system designer to implement error detection and retry mechanisms in the application software to ensure reliable data transmission.

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DS485M/NOPB Overview

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About Texas Instruments

Texas Instruments (TI) designs and manufactures semiconductors and integrated circuits for a wide range of applications. The company's product portfolio includes analog chips, which are essential for managing power and signal functions in electronic devices, and embedded processors, which serve as the brains in various systems, enabling functionality in everything from industrial equipment to consumer electronics. TI's innovations in semiconductor technology have made it a leader in the industry.

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