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Product Detailed Parameters
- Description：TRANS 7NPN DARL 50V 500MA
- Series：-
- Mfr：STMicroelectronics
- Package：Tube
- Transistor Type：7 NPN Darlington
- Current - Collector (Ic) (Max)：500mA
- Voltage - Collector Emitter Breakdown (Max)：50V
- Vce Saturation (Max) @ Ib, Ic：1.6V @ 500µA, 350mA
- Current - Collector Cutoff (Max)：-
- DC Current Gain (hFE) (Min) @ Ic, Vce：1000 @ 350mA, 2V
- Power - Max：-
- Frequency - Transition：-
- Operating Temperature：150°C (TJ)
- Mounting Type：-
- Package / Case：-
- Supplier Device Package：-
- Grade：-
- Qualification：-
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Overview
The E-ULQ2003A is a high-voltage, high-current Darlington array manufactured by STMicroelectronics. It contains seven open-collector Darlington pairs with common emitters, each channel rated for 500 mA continuous output current and capable of withstanding 600 mA peak currents. The device features an output voltage rating of 50 V and includes integrated suppression diodes for inductive load driving. Inputs are pinned opposite outputs to simplify board layout and interface with TTL, CMOS, PMOS, and DTL logic families.
Feature Summary
- Seven Darlington pairs per package
- Integrated suppression diodes for inductive loads
- Inputs pinned opposite outputs to simplify layout
Applications
- Driving solenoids and relays
- Controlling DC motors
- Powering LED displays and filament lamps
- Operating thermal print-heads
- High-power buffering
Procurement Notes
Verify the specific suffix 'E' against official STMicroelectronics documentation to confirm if it denotes a specific tape-and-reel packaging variant or a distinct qualification level, as standard datasheets typically list ULQ2003A in DIP-16 or SO-16 packages without this prefix. Ensure the component matches the required automotive grade specifications if applicable, noting that AEC-Q100 qualification is explicitly documented for the ULQ2003 in SO16 packages.
Selection Notes
Select this component when driving multiple inductive loads such as relays or solenoids from a single logic source. The 500 mA per channel rating supports direct connection to moderate power devices. Verify input logic compatibility (TTL/CMOS) and ensure the PCB layout utilizes the opposite pin arrangement for inputs and outputs to minimize trace length and complexity.
Part Context
The ULQ2003A belongs to a family of high-voltage Darlington arrays including the ULN2001, ULN2002, and ULN2004 series. These devices share similar internal architectures but differ in input threshold characteristics to match specific logic families like PMOS or DTL. The ULQ2003A is specifically optimized for interfacing with 5V TTL and CMOS logic standards.
Replacement Considerations
Compatible substitutes include the ULN2003A and ULQ2003A from STMicroelectronics. Other manufacturers offer equivalent parts such as the SN75471 or MC1413B, though pinouts and electrical characteristics must be verified against the original datasheet.
