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ULN2804A - STMicroelectronics

Description: ULN2804A, Darlington Transistor Array, NPN 0.5 A 50 V, Octal, 18-Pin, PDIP

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ULN2804A - STMicroelectronics - PCB symbol
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PCB Footprints
ULN2804A - STMicroelectronics PCB footprint - Dual-In-Line Packages - Dual-In-Line Packages - DIP-18
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ULN2804A - STMicroelectronics - 3D model - Dual-In-Line Packages - DIP-18
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ULN2804A Details

  • Manufacturer Part Number:

    ULN2804A

  • Brand Name:

    STMicroelectronics

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Active

  • Part Package Code:

    DIP

  • Package Description:

    DIP-18

  • Pin Count:

    18

  • Country Of Origin:

    Mainland China, Malaysia

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.60

  • Factory Lead Time:

    10 Weeks

  • Manufacturer:

    STMicroelectronics

  • YTEOL:

    5.5

  • Built-in Protections:

    TRANSIENT

  • Driver Number of Bits:

    8

  • Interface IC Type:

    BUFFER OR INVERTER BASED PERIPHERAL DRIVER

  • JESD-30 Code:

    R-PDIP-T18

  • Length:

    23.24 mm

  • Number of Functions:

    1

  • Number of Terminals:

    18

  • Operating Temperature-Max:

    85 °C

  • Operating Temperature-Min:

    -20 °C

  • Output Characteristics:

    OPEN-COLLECTOR

  • Output Current Flow Direction:

    SINK

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Code:

    DIP

  • Package Equivalence Code:

    DIP18,.3

  • Package Shape:

    RECTANGULAR

  • Package Style:

    IN-LINE

  • Seated Height-Max:

    3.93 mm

  • Surface Mount:

    NO

  • Terminal Form:

    THROUGH-HOLE

  • Terminal Pitch:

    2.54 mm

  • Terminal Position:

    DUAL

  • Turn-off Time:

    1 µs

  • Turn-on Time:

    1 µs

  • Width:

    7.62 mm

ULN2804A Frequently Asked Questions (FAQs)

  • The maximum current that each output can handle is 500mA. However, it's recommended to derate the current to 350mA for reliable operation.
  • The power dissipation of the ULN2804A can be calculated using the formula: Pd = (Vin - Vout) x Iout x N, where Vin is the input voltage, Vout is the output voltage, Iout is the output current, and N is the number of outputs.
  • The minimum input voltage required for the ULN2804A to function properly is 4.5V. However, it's recommended to use a minimum of 5V for reliable operation.
  • Yes, the ULN2804A can be used as a relay driver. However, it's essential to ensure that the relay coil current is within the maximum current rating of the ULN2804A (500mA per output).
  • To protect the ULN2804A from back-EMF when driving inductive loads, a freewheeling diode (such as 1N4007) should be connected in parallel with the load. This diode will absorb the back-EMF and prevent damage to the ULN2804A.

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ULN2804A Overview

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To find more CAD model downloads similar to this part, try a partial part number search, like ULN28, or try a keyword search, such as Peripheral Drivers

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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