Manufacturer Part Number
ULN2804A
Manufacturer
onsemi
Introduction
High-voltage, high-current Darlington transistor arrays
Designed to interface low-logic-level digital circuits to high-power devices
Product Features and Performance
8 NPN Darlington-connected transistors
Capable of driving inductive loads such as relays, solenoids, and LED displays
High-voltage outputs (up to 50V)
High-current outputs (up to 500mA per channel)
Saturation voltage as low as 1.6V at 350mA
DC current gain (hFE) of 1000 minimum at 350mA
Product Advantages
Simplifies power interface design
Reduces component count
Protects microprocessors from inductive transients
Provides high-current capability
Key Technical Parameters
Operating Temperature: -20°C ~ 150°C
Power Dissipation: 2.25W
Collector-Emitter Breakdown Voltage: 50V
Collector Current: 500mA
Quality and Safety Features
RoHS non-compliant
Compatibility
Through-hole mounting (18-DIP package)
Application Areas
Driving inductive loads such as relays, solenoids, and LED displays
Interface between low-logic-level digital circuits and high-power devices
Product Lifecycle
This product is still actively available and supported by the manufacturer.
Key Reasons to Choose This Product
Simplifies power interface design and reduces component count
Provides high-voltage (up to 50V) and high-current (up to 500mA) outputs
Protects microprocessors from inductive transients
Offers high DC current gain (1000 minimum at 350mA)
Suitable for a wide range of inductive load applications
ULN2804LWAllegro MicroSystems