STMicroelectronics ULN2004D1013TR

Overview

ULN2004D1013TR from STMicroelectronics is a 7-channel high-voltage, high-current Darlington array IC designed for interfacing CMOS/PMOS logic (6–15 V) to inductive loads. Each channel delivers 500 mA continuous output current (600 mA peak), supports 50 V output voltage, and integrates clamp diodes. It is used in relay drivers, solenoid controls, and thermal printhead interfaces.

For engineers reviewing the ULN2004D1013TR datasheet, ULN2004D1013TR pinout, ULN2004D1013TR application, or ULN2004D1013TR equivalent, key selection factors include input voltage compatibility (6–15 V CMOS/PMOS), open-collector output configuration, thermal resistance (R_thJA = 64.7 °C/W), and SO-16 narrow package layout constraints.

Technical Context

The ULN2004D1013TR implements seven independent Darlington transistor pairs with common-emitter outputs and integrated flyback diodes-each optimized for driving inductive loads without external protection components. Its input stage is tailored for 6–15 V CMOS/PMOS logic families, with VI(ON) threshold ranging from 5 V to 8 V depending on load current.

It operates across –40 °C to +85 °C ambient, features 2 kV HBM ESD rating, and uses a copper leadframe SO-16 package to achieve R_thJA = 64.7 °C/W. Output saturation voltage remains ≤1.6 V at 350 mA, enabling efficient power delivery while maintaining low conduction loss.

Key Specifications

Pinout & Package

ULN2004D1013TR is housed in a 16-pin SO-16 narrow surface-mount package (JEDEC MS-012AC), with 1.27 mm pitch, 10.0 mm × 6.0 mm body, and exposed thermal pad-compatible footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ULN2003D1013TR, ULN2004D1013TR offers higher input voltage tolerance but requires stronger drive; compared with TBD7200FNG, it trades speed and current for integration, simplicity, and cost in moderate-speed industrial loads.

Availability

ULN2004D1013TR is available at Aetrix Electronics and suitable for industrial relay control, thermal printhead driving, and solenoid valve actuation requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for ULN2004D1013TR 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 automotive, industrial, and power management ICs with vertical manufacturing and broad portfolio coverage.

The ULN200x series belongs to ST's legacy high-voltage interface product line, engineered specifically for robust, low-cost driving of inductive and resistive loads in industrial control, automation, and appliance applications.

FAQ

Can ULN2004D1013TR drive a 24 V relay coil drawing 400 mA?

Yes. Each channel supports 500 mA continuous current and 50 V output voltage, making it suitable for 24 V relays with ≤400 mA coil current. Ensure the COM pin is connected to +24 V to activate internal clamp diodes during turn-off, preventing voltage transients above 50 V.

What is the maximum number of outputs that can be paralleled safely?

Up to three outputs may be paralleled to deliver ~1.5 A, provided PCB layout maintains equal trace lengths and thermal vias under each output pad. Derate total power based on R_thJA = 64.7 °C/W and ambient temperature; at 70 °C ambient, total dissipation should remain below 1.2 W.

Is a heat sink required for continuous 500 mA operation?

No dedicated heat sink is required. At 500 mA and V_CE(SAT) = 1.4 V, power dissipation per channel is 0.7 W. With R_thJA = 64.7 °C/W, junction temperature rise is ~45 °C above ambient - well within the 150 °C limit at ≤85 °C ambient, assuming standard 2 oz copper and 2 thermal vias per pad.

Does ULN2004D1013TR support PWM dimming of LED filaments?

Yes, but with limitations. It supports PWM frequencies up to ~10 kHz due to t_PLH/t_PHL ≤ 1 µs, but V_CE(SAT) increases with frequency due to Darlington storage time. For clean 100 Hz–1 kHz dimming (typical for filament emulation), it performs reliably without added complexity.