STMicroelectronics ULN2003D1013TR

Overview

ULN2003D1013TR from STMicroelectronics is a seven-channel high-voltage, high-current Darlington array IC with integrated clamp diodes, 500 mA continuous output current per channel, 50 V output voltage rating, and TTL/CMOS-compatible inputs-designed for driving relays, solenoids, and LED displays in industrial control interfaces.

For engineers reviewing the ULN2003D1013TR datasheet, ULN2003D1013TR pinout, ULN2003D1013TR application, or ULN2003D1013TR equivalent, this device supports layout-optimized input-output pin pairing, SO-16 narrow package thermal performance (R_thJA = 64.7 °C/W), and parallel-channel current boosting up to 600 mA peak per driver.

Technical Context

The ULN2003D1013TR implements seven independent open-collector Darlington pairs with common emitters and integrated flyback diodes-each configured for inductive load switching without external protection components. Its input logic threshold is optimized for 5 V TTL/CMOS systems (V_I(ON) = 2.4 V min at I_C = 200 mA).

Thermal design is constrained by R_thJA = 64.7 °C/W (SO-16) and maximum junction temperature of 150 °C; operation at 85 °C ambient requires derating to ≤350 mA continuous per active channel when ≥3 outputs are driven simultaneously.

Key Specifications

Pinout & Package

ULN2003D1013TR is supplied in a 16-pin SO-16 narrow surface-mount package (JEDEC MS-013AC), with 1.27 mm pitch, 10 mm × 4 mm body size, and exposed thermal pad not present-thermal path relies on copper pour under pins 1–8 and 9–16.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Darlington array applications.

Compared with ULN2003A, ULN2003D1013TR offers superior thermal performance and SMT compatibility; compared with TBD62083AFNG, it eliminates external diodes but trades one channel for integrated protection-making it optimal for 7-load industrial I/O where reliability and BOM reduction are prioritized.

Availability

ULN2003D1013TR is available at Aetrix Electronics and suitable for industrial automation, point-of-sale equipment, and embedded control systems requiring stable component supply across multi-year production cycles.

Supply support for ULN2003D1013TR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in power management, analog, and discrete devices for industrial, automotive, and consumer markets.

The ULN2003 series belongs to ST's high-voltage interface IC product line, engineered specifically for robust, low-cost replacement of discrete transistor/diode combinations in electromechanical control applications.

FAQ

Can ULN2003D1013TR drive 24 V relays directly?

Yes. With its 50 V output voltage rating and 500 mA continuous current per channel, ULN2003D1013TR can directly switch 24 VDC relays drawing ≤500 mA coil current. The integrated clamp diode protects against inductive kickback when the relay de-energizes-no external diode is required if the COM pin is connected to the relay's positive supply rail.

What is the maximum number of channels that can be paralleled?

Up to three adjacent channels (e.g., OUT1–OUT3) can be safely paralleled to deliver 1.5 A peak current, provided trace width and PCB copper weight support the combined current and thermal dissipation remains within R_thJA-limited boundaries. Derating to 400 mA per channel is recommended for sustained operation above 60 °C ambient.

Does ULN2003D1013TR require external base resistors?

No. Each input includes an internal 2.7 kΩ series resistor, enabling direct connection to 5 V TTL/CMOS logic outputs. Applying >5.5 V to any input risks exceeding the 30 V absolute maximum input voltage rating and may damage the input stage-level-shifting is required for higher-voltage logic families.

How does thermal performance compare between SO-16 and DIP-16 packages?

The SO-16 package (ULN2003D1013TR) has R_thJA = 64.7 °C/W, outperforming the DIP-16 (ULN2003A) at R_thJA = 70 °C/W under identical board conditions. This 7.5% improvement allows ~10% higher continuous current per channel at 70 °C ambient, making SO-16 preferable for thermally constrained SMT designs.