ULQ2003ADR2G

ULQ2003ADR2G is a 7-channel Darlington transistor array used to sink high-current loads from a microcontroller or logic device. Key points:
- 7 NPN Darlington pairs with common emitters to ground; outputs are open-collector.
- Built-in flyback/diode network tied to a common COM pin for inductive loads (e.g., relays, solenoids).
- Inputs are TTL/CMOS-compatible; easy interfacing from 5 V logic.
- Each channel sinks load current to ground when its input is driven high.
- Suitable for driving relays, motors, LEDs, and other high-current devices from low-power control signals.
- Typically offered in 16-pin packages (DIP/SOP) and RoHS-compliant variants.
- Ratings (per channel) are in the hundreds of milliamps range with a maximum collector-emitter voltage up to tens of volts (exact numbers depend on the specific part variant).
Applications: relay matrices, motor/actuator drivers, LED display drivers, and other low-side switching tasks where multiple loads must be driven from a microcontroller.

Direct equivalent: ULN2003A (Texas Instruments) — the standard 7-channel Darlington transistor array with built-in flyback diodes and common emitters. Other vendors offer drop-in ULN2003A-compatible clones (same pinout and specs). Closest family member for 8 channels: ULN2803A. Always verify package (DIP/SMD), diode ratings (about 50 V), and per-channel current.

Key features of ULQ2003ADR2G:
- 7-channel Darlington transistor array with open-collector outputs (sinks current only).
- Each channel can sink up to ~500 mA; Vceo up to 50 V per channel.
- Built-in input resistors; logic-level (TTL/CMOS) compatible inputs.
- Common freewheel diodes for inductive-load protection via COM pin.
- High current-gain, low input current required to switch.
- Packages: DIP-16 and SO-16; RoHS-compliant; ADR2G indicates tape/reel packaging.
- Suitable for driving relays, coils, solenoids, LEDs, stepping motors, etc.

- Pin count: 16 pins (DIP/SO package)
- Function: 7-channel Darlington transistor array (low-side switches). Each input (IN1–IN7) drives a corresponding open-collector output to sink load current to ground. Includes a common GND pin and a COM pin for flyback diodes to supply voltage, suitable for driving inductive loads (relays, motors) and LEDs. Typical ratings: up to ~50 V and ~500 mA per channel.

Manufacturer: Texas Instruments (TI).
What kind of company: TI is an American multinational technology company that designs and manufactures semiconductors and integrated circuits used in a wide range of electronic products.

ULQ2003ADR2G is a 7-channel Darlington sink driver with common emitter and built-in flyback diodes. It interfaces logic-level signals to higher-current/inductive loads. Typical applications:
- Driving relays (coil current up to ~500 mA per channel, up to 50 V)
- Driving inductive loads: DC motors, stepper motors, solenoids, buzzers
- Sinking current for LEDs, LED displays, or LED matrices
- Microcontroller/MCU I/O expansion where more current is needed
- Automotive/industrial control panels and other control circuits
It protects the controlling logic from inductive kick and simplifies wiring.

16-pin plastic DIP (DIP-16) package.