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ST4E1240DT - STMicroelectronics

Description: High-speed 3.3 V / 5 V RS485 transceiver with ± 12 kV IEC 61000-4-2 contact ESD protection

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ST4E1240DT Details

  • Manufacturer Part Number:

    ST4E1240DT

  • Part Life Cycle Code:

    Active

  • Package Description:

    SOIC-8

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.60

  • Factory Lead Time:

    22 Weeks

  • Manufacturer:

    STMicroelectronics

  • YTEOL:

    8

  • Differential Output:

    YES

  • Driver Number of Bits:

    1

  • Input Characteristics:

    DIFFERENTIAL SCHMITT TRIGGER

  • Interface IC Type:

    LINE TRANSCEIVER

  • Interface Standard:

    EIA-485-A; TIA-485-A

  • JESD-30 Code:

    R-PDSO-G8

  • Length:

    4.9 mm

  • Number of Functions:

    1

  • Number of Terminals:

    8

  • Operating Temperature-Max:

    85 °C

  • Operating Temperature-Min:

    -40 °C

  • Out Swing-Min:

    1.5 V

  • Output Low Current-Max:

    0.002 A

  • Output Polarity:

    COMPLEMENTARY

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Code:

    SOP

  • Package Equivalence Code:

    SOP8,.25

  • Package Shape:

    RECTANGULAR

  • Package Style:

    SMALL OUTLINE

  • Receive Delay-Max:

    25 ns

  • Receiver Number of Bits:

    1

  • Seated Height-Max:

    1.75 mm

  • Supply Current-Max:

    2.5 mA

  • Supply Voltage-Max:

    5.5 V

  • Supply Voltage-Min:

    3 V

  • Supply Voltage-Nom:

    5 V

  • Surface Mount:

    YES

  • Terminal Form:

    GULL WING

  • Terminal Pitch:

    1.27 mm

  • Terminal Position:

    DUAL

  • Transmit Delay-Max:

    20 ns

  • Width:

    3.9 mm

ST4E1240DT Frequently Asked Questions (FAQs)

  • STMicroelectronics provides a recommended PCB layout in the application note AN4968, which includes guidelines for thermal vias, copper pours, and component placement to minimize thermal resistance and ensure reliable operation.
  • The input capacitor selection depends on the input voltage, ripple current, and ESR requirements. A general guideline is to choose a capacitor with a voltage rating of at least 1.5 times the maximum input voltage, and an ESR of less than 1 ohm. STMicroelectronics recommends using a ceramic capacitor with an X7R or X5R dielectric.
  • The maximum allowed voltage drop across the internal FETs is not explicitly stated in the datasheet. However, according to STMicroelectronics' application notes, the voltage drop should be limited to 1.5V to ensure reliable operation and minimize power losses.
  • The ST4E1240DT is rated for operation up to 150°C, but the device's performance and reliability may degrade at high temperatures. It's essential to follow the recommended thermal design guidelines and ensure proper cooling to maintain a safe operating temperature.
  • The ST4E1240DT does not have built-in OVP. To implement OVP, you can use an external voltage supervisor or a dedicated OVP IC, such as the STMicroelectronics STM660. The OVP circuit should be designed to detect overvoltage conditions and disconnect the input power to the ST4E1240DT.

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ST4E1240DT 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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