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ULN2803AD is listed in the Inverter Gates range at ChipApex. The manufacturer field lists TAEJIN. Its product description is TRANS 8NPN DARL 50V 0.5A SOP-18. Review the specifications below when checking this part for your BOM.
The ULN2803AD is an 8-channel NPN Darlington transistor array manufactured by TAEJIN in a SOP-18 package. It features high-voltage outputs rated at 50V and a single-output collector current of 500mA. The device integrates common-cathode clamp diodes for switching inductive loads. Input pins are positioned opposite to output pins to simplify circuit layout.
Verify the manufacturer designation as TAEJIN against the HTC datasheet provided in the source material, which lists the part number ULN2803AD under HTC branding. Confirm that the SOP-18 package marking matches the specific revision R1.0.3 documented in the reference text before finalizing procurement specifications.
Select this component when driving inductive loads such as relays or motors requiring up to 500mA per channel. The integrated clamp diodes eliminate the need for external flyback protection. Ensure the logic interface voltage levels remain within the specified ON-state input voltage limits for reliable switching operation.
This component belongs to the ULN2803A series of monolithic high-voltage, high-current Darlington transistor arrays. The ULN2803AD specifically denotes the SOP-18 surface-mount variant, while the ULN2803AN represents the DIP-18 through-hole version. Both variants share identical electrical characteristics and pin configurations.
ULN2803AN (DIP-18 equivalent)
Pin 10 serves as the Common Cathode Node for the internal flyback diodes.
Input pins are placed opposite to output pins to simplify circuit layout.
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