8 NPN Darlington Pairs: Both devices contain eight independent Darlington transistor pairs, which act as high-current switches, making them suitable for driving a wide range of loads.High Voltage & Current Capabilities: They can handle high-voltage outputs (typically up to 50V) and high output currents (up to 500 mA per channel, with peak ratings of 600 mA).Integrated Clamp Diodes: Both include built-in clamp diodes to protect against voltage spikes when switching inductive loads like relays, motors, or solenoids.Logic Compatibility: They are designed to be compatible with various logic families, including TTL (Transistor-Transistor Logic) and CMOS (Complementary Metal-Oxide-Semiconductor) inputs.Package: Both are commonly available in a DIP-18 (Dual In-line Package with 18 pins) package, which is suitable for through-hole mounting on circuit boards.Applications: They are widely used in applications like driving relays, hammers, lamps, LED displays, and other high-current loads controlled by low-level logic signals.Input Resistors: The ULN2804A, specifically, includes 10.5 k? series base resistors that allow direct operation from CMOS devices with supply voltages ranging from 6 V to 15 V.Input/Output Pinout: The inputs are often placed opposite the outputs in the IC package, which can simplify the layout of the application board.
