ULN2803A

Product Folder Order Now Technical Documents Tools & Software Support & Community ULN2803A SLRS049H – FEBRUARY 1997 – REVISED FEBRUARY 2017 ULN2803A Darlington Transistor Arrays 1 Features 1 500-mA-Rated Collector Current (Single Output) High-Voltage Outputs: 50 V Output Clamp Diodes Inputs Compatible With Various Types of Logic 2 Applications Relay Drivers Hammer Drivers Lamp Drivers Display Drivers (LED and Gas Discharge) Line Drivers Logic Buffers Stepper Motors IP Camera HVAC Valve and LED Dot Matrix 3 Description The ULN2803A device is a 50 V, 500 mA Darlington transistor array. The device consists of eight NPN Darlington pairs that feature high-voltage outputs with common-cathode clamp diodes for switching inductive loads. The collector-current rating of each Darlington pair is 500 mA. The Darlington pairs may be connected in parallel for higher current capability. Applications include relay drivers, hammer drivers, lamp drivers, display drivers (LED and gas discharge), line drivers, and logic buffers. The ULN2803A device has a 2.7-kΩ series base resistor for each Darlington pair for operation directly with TTL or 5-V CMOS devices. Device Information(1) PART NUMBER PACKAGE BODY SIZE (NOM) ULN2803ADW SOIC (18) 11.55 mm × 7.50 mm (1) For all available packages, see the orderable addendum at the end of the data sheet. 1 1B Logic Diagram 18 1C 2 2B 17 2C 3 3B 16 3C 4 4B 15 4C 5 5B 14 5C 6 6B 13 6C 7 7B 12 7C 8 8B 11 8C...