ULN2003AT16-13

Overview

The ULN2003AT16-13 is a high-voltage, high-current Darlington array manufactured by Diodes Incorporated. It contains seven open-collector Darlington pairs with common emitters. Each channel provides a continuous output current of 500 mA and can withstand peak currents of 600 mA. The device features integrated suppression diodes for inductive load driving and inputs pinned opposite outputs to simplify board layout. It interfaces directly with 5 V TTL and CMOS logic families. The component is supplied in a 16-lead Small Outline package (SOIC) with an 'A' suffix indicating enhanced thermal performance via a copper leadframe.

Feature Summary

• Seven independent high-current Darlington driver channels per package
• Integrated cathode clamp diodes for protecting against inductive load back-EMF
• Direct compatibility with 5 V TTL and CMOS logic input levels
• Opposite pinning arrangement of inputs and outputs to facilitate PCB routing

Applications

• Relay drivers
• Stepping motor drivers
• High-power buffer circuits
• LED display drivers

Procurement Notes

Verify the specific manufacturer designation, as Diodes Incorporated produces variants such as the ULN2003V12 which offer reduced power consumption compared to standard industry equivalents. Confirm that the SOIC-16 package matches the required footprint and that the part number suffix corresponds to the tape-and-reel configuration intended for automated assembly processes.

Selection Notes

Select this component when interfacing low-level logic with multiple peripheral power loads requiring up to 500 mA per channel. Ensure the application voltage does not exceed the 50 V rating for standard operation. Consider paralleling outputs if higher current capability than 500 mA is required, while accounting for thermal dissipation limits within the SOIC-16 package constraints.

Part Context

This part belongs to the ULN20xx series of high-voltage Darlington arrays. The ULN2003 variant is specifically optimized for 5 V logic systems, distinguishing it from the ULN2004 which supports higher voltage CMOS/PMOS inputs. The 'T16-13' suffix indicates the surface-mount SOIC-16 packaging format with reel quantity specifications typical for SMD manufacturing lines.

Replacement Considerations

Standard industry equivalents include the TI ULN2003A or STMicroelectronics ULN2003. Verify electrical equivalence regarding input resistor values and saturation voltages. Note that some modern alternatives like the Diodes ULN2003V12 may offer improved efficiency but require confirmation of pinout compatibility.