The ULN2003V12PWR is a 16pin TSSOP transistor array that provides seven NPN Darlington sink drivers with a common emitter configuration. It is designed to interface logiclevel signals from microcontrollers with highercurrent inductive loads, offering builtin protection and a compact form factor suitable for spaceconstrained boards. Key benefits Reliable multichannel sinking: seven Darlington pairs allow driving multiple loads from a single device, simplifying board design and reducing component count. Integrated flyback protection: builtin flyback diodes protect the driving circuitry from inductive kickback, enabling safe operation with relays, solenoids, and other inductive loads. Easy logic interface: each input includes an internal series resistor, enabling direct connection to typical 5V logic signals without external base resistors. Compact package: 16pin TSSOP surfacemount package provides a small footprint for compact or densely populated PCBs. 12Vfriendly applications: designed for loads in 12V systems, while still compatible with standard logiclevel control signals. The device supports load voltages up to 50V and perchannel sink current up to 500 mA, making it suitable for a range of automotive, industrial, and hobby applications. Key attributes Functionality: seven NPN Darlington sink channels with common emitter; builtin input resistors; common flyback diode pin configuration. Compatibility: designed for logiclevel control from microcontrollers (5V logic commonly used); suitable for driving inductive loads such as relays and solenoids. Size and packaging: TSSOP16 package; compact surfacemount form factor for spaceconstrained designs. Construction and protection: integrated flyback diodes connect to the COM pin to clamp inductive spikes; robust channeltochannel isolation typical of ULN2003series devices. Performance: perchannel sink current up to 500 mA; load voltage rating up to 50V (Vceo); suitable for a wide range of standard control tasks including 12V relay coils and similar inductive loads. Interface: builtin input resistors facilitate direct connection to standard 5V logic sources, simplifying board design. Specifications snapshot (typical) Channels: 7 Darlington sink drivers Load voltage rating: up to 50V Maximum sink current per channel: up to 500 mA Input: logiclevel compatible with 5V control signals, with internal base resistors Diodes: integrated flyback diodes connected to a common COM pin Package: TSSOP16, surfacemount Applications and use cases Relay control in microcontroller projects: drive 12V relays directly from a microcontroller, using the ULN2003V12PWR to sink coil current while protecting the microcontroller from inductive spikes. Small robotics and automation: switch multiple inductive loads such as solenoids or motor windings, enabling compact control of actuators from a single control node. Inductive load switching in embedded systems: manage fan motors, pumps, or other inductive devices in hobbyist or industrialgrade projects, with integrated protection and minimal external circuitry. This device provides a practical, compact solution for reliably sinking multiple inductive loads from microcontroller or logiclevel drivers, while protecting the control circuitry and reducing the number of external components required.