ULN2003 : SMD/SMT Darlington Transistor Arrays

ULN2003 SMD/SMT Darlington Transistor Array IC - 7-Channel High-Current Driver

The ULN2003 SMD/SMT Darlington Transistor Array IC is a high-voltage, high-current integrated circuit. It interfaces low-level logic with various power loads. Each of the seven drivers supports a continuous load current of up to 500 mA. The array manages power loads for inductive and resistive applications. Integrated clamp diodes provide protection for transient-sensitive outputs. The ULN2003A/L variant is compatible with 5V TTL or CMOS logic via series input resistors. It is supplied in compact SMD/SMT packages.

Specifications:

• Number of Drivers: 7
• Output Current (per driver): 500 mA (continuous)
• Input Compatibility: TTL, DTL, PMOS, CMOS
• Output Voltage (OFF state): Up to 50V (ULN2003A/L), 95V (ULN2023A/L)
• Output Type: Open-Collector with Clamp Diodes
• Input Resistors: Series (for 5V TTL/CMOS in ULN2003A/L)
• Total Power Loads (typical): Over 230 W
• Package Type: SOIC (SMD/SMT), DIP

Key features and benefits:

• 7-channel Darlington array
• Each driver supports 500 mA continuous current
• Compatible with TTL, DTL, PMOS, and CMOS logic inputs
• Integrated clamp diodes for transient protection
• Open-collector outputs
• Outputs can be paralleled for increased current capacity
• Available in SMD/SMT (SOIC) package

Applications:

• Driving relays and solenoids
• Controlling stepping motors
• Managing multiplexed LED and incandescent displays
• Heating element control
• High-current load interfacing

Frequently Asked Questions:

Q: Can the ULN2003 outputs be paralleled for increased current capacity?
A: Yes, the outputs of the ULN2003 can be paralleled to achieve higher current capacity for a single load.

Q: What input logic voltage levels are compatible with the ULN2003A/L variant?
A: The ULN2003A/L variant is compatible with 5V TTL or CMOS logic inputs due to integrated series input resistors. It also supports DTL and PMOS logic.

Q: Does this IC include protection for inductive loads?
A: Yes, the ULN2003 includes integrated clamp diodes to provide transient protection when driving inductive loads such as relays and solenoids.

Package Includes:

*Image shown is a representation only.

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