Texas Instruments ULN2003AIDR, Series ULx200xA, 7-channel NPN Darlington relay/solenoid driver, 500 mA per channel, 50 V load, inverting input, parallel interface, 16-SOIC package, -40°C to 105°C.
| Parameter | Value |
|---|---|
| Series | ULx200xA |
| Input type | Inverting |
| Output type | NPN |
| Type | Relay, Solenoid Driver |
| Mounting | Surface Mount |
| Voltage - load | 50V (Max) |
| Voltage - supply (Vcc (Vdd)) | Not Required |
| Output current | 500mA |
| I/O channels | 7 |
| Interface | Parallel |
| Operating temperature | -40°C ~ 105°C (TA) |
| Package | Tape & Reel (TR); Cut Tape (CT) |
| Case | 16-SOIC (0.154\", 3.90mm Width) |
| Output configuration | Low Side |
| Ratio - Input:Output | 1:1 |
This part is a staple in industrial control panels, PLC output stages, relay logic replacement, motor-drive interface boards, and appliance control PCBs. It is not rated for military or avionics temperature extremes, but covers the industrial and extended-commercial band well.
It is ROHS3 compliant.
The total package dissipation limits how many channels can run at full current simultaneously — derate for ambient temperature and PCB copper area.
It is a 7-channel Darlington driver for relays, solenoids, stepper motors, and other inductive loads. Common in PLC outputs, industrial control panels, and appliance logic boards. The built-in flyback diodes simplify driving inductive loads from logic-level signals.
The ULN2003AIDR is the surface-mount SOIC-16 version of the same die. The base ULN2003 is typically in a DIP-16 through-hole package. Electrical ratings (500 mA per channel, 50 V load, inverting inputs) are identical. The 'A' suffix indicates the industrial temperature range (-40°C to 105°C) versus the commercial 0°C to 70°C of the standard ULN2003.
The ULN2003AIDR is pin-compatible with all SOIC-16 ULN2003 variants from TI and second-source manufacturers (e.g., STMicroelectronics, NXP). The ULN2004AIDR is the same package and pinout but with higher input impedance for CMOS logic instead of TTL. For through-hole designs, the ULN2003AIN (DIP-16) is the same die.