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ULN2803 Specifications

Detailed technical information and Application Scenarios

Product Details

PartNumberManufactorQuantityAvailability
ULN2803UTC72560Yes

ULN2803 is a high-voltage, high-current Darlington transistor array manufactured by STMicroelectronics.

The ULN2803 is a high-voltage, high-current Darlington transistor array manufactured by STMicroelectronics.

Specifications:

  • Output Current per Channel: 500 mA (max)
  • Output Voltage: 50 V (max)
  • Input Voltage (Logic Compatible): 3.3 V to 5 V
  • Number of Channels: 8
  • Configuration: Common-cathode clamp diodes for inductive loads
  • Package: DIP-18, SO-18
  • Power Dissipation: 2.25 W (total)

Descriptions:

The ULN2803 is an 8-channel Darlington driver IC designed for interfacing low-voltage logic circuits (such as microcontrollers) with high-power loads like relays, motors, and lamps. It includes built-in suppression diodes for inductive load protection.

Features:

  • High-Voltage Outputs: Up to 50 V
  • High-Current Sinking Capability: 500 mA per channel
  • Inputs Compatible with TTL and CMOS Logic
  • Built-in Clamp Diodes for Inductive Loads
  • Wide Operating Temperature Range: -20°C to +85°C
  • Relay Driver Applications

This IC is commonly used in industrial control systems, automation, and embedded applications requiring multiple high-power switching channels.

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