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ST485CDR - STMicroelectronics

Description: ST485CDR, Line Transceiver, RS-485, RS-422 2.5Mbit/s Differential, 5V, 8-Pin SO

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ST485CDR - STMicroelectronics PCB footprint - Small Outline Packages - Small Outline Packages - SO-8 batwing1
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ST485CDR Details

  • Manufacturer Part Number:

    ST485CDR

  • Brand Name:

    STMicroelectronics

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Active

  • Part Package Code:

    SOIC

  • Package Description:

    SOP-8

  • Pin Count:

    8

  • Country Of Origin:

    Morocco

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.60

  • Factory Lead Time:

    14 Weeks

  • Manufacturer:

    STMicroelectronics

  • YTEOL:

    6.72

  • Differential Output:

    YES

  • Driver Number of Bits:

    1

  • Input Characteristics:

    DIFFERENTIAL SCHMITT TRIGGER

  • Interface IC Type:

    LINE TRANSCEIVER

  • Interface Standard:

    EIA-422; EIA-485

  • JESD-30 Code:

    R-PDSO-G8

  • 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:

    230 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

  • Temperature Grade:

    COMMERCIAL

  • Terminal Finish:

    Tin (Sn) - immersion

  • Terminal Form:

    GULL WING

  • Terminal Pitch:

    1.27 mm

  • Terminal Position:

    DUAL

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

    30

  • Transmit Delay-Max:

    70 ns

  • Width:

    3.9 mm

ST485CDR Frequently Asked Questions (FAQs)

  • The maximum cable length supported by the ST485CDR is dependent on the baud rate and the type of cable used. As a general rule, the maximum cable length is around 1200 meters at 9600 bps, but it can be shorter at higher baud rates.
  • To ensure reliable data transmission with the ST485CDR, it is recommended to use a balanced transmission line, such as a twisted pair cable, and to follow proper termination and grounding techniques. Additionally, using a common mode choke and a shielded cable can help to reduce electromagnetic interference (EMI).
  • The ST485CDR and the SN65HVD72 are both RS-485 transceivers, but they have some differences. The ST485CDR has a higher data rate (up to 50 Mbps) and a lower power consumption (down to 1.8V) compared to the SN65HVD72. The ST485CDR also has a built-in 15kΩ pull-up resistor on the receiver input, whereas the SN65HVD72 does not.
  • To handle hot swapping with the ST485CDR, it is recommended to use a bus holder circuit to maintain the bus in a defined state during power-up and power-down. This can be achieved using a voltage supervisor and a power-on reset circuit.
  • The maximum number of nodes supported by the ST485CDR is 32, as per the RS-485 standard. However, the actual number of nodes that can be supported may be limited by the specific application and the cable length.

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ST485CDR Overview

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About STMicroelectronics

STMicroelectronics (ST) is a global semiconductor company that designs, manufactures, and markets a broad range of integrated circuits (ICs), discrete devices, and other electronic components. STMicroelectronics offers a diverse portfolio of semiconductor products covering a wide range of applications and industries. Their product categories include microcontrollers, analog and mixed-signal ICs, MEMS (Micro-Electro-Mechanical Systems) sensors, power management ICs, RF (Radio Frequency) transceivers, aut

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