Diodes Incorporated ULN2003AS16-13

Overview

ULN2003AS16-13 from Diodes Incorporated is a 7-channel high-voltage, high-current Darlington transistor array in SO-16 package, rated for 500mA per channel and 50V collector-emitter voltage, with integrated clamp diodes and TTL/CMOS-compatible inputs - used to drive relays, solenoids, and LED displays in industrial control interfaces.

For engineers reviewing the ULN2003AS16-13 datasheet, ULN2003AS16-13 pinout, ULN2003AS16-13 application, or ULN2003AS16-13 equivalent, this device is selected for robust inductive load switching where logic-level input compatibility, output clamping, thermal reliability at +105°C, and SO-16 board-space efficiency are required.

Technical Context

The ULN2003AS16-13 integrates seven independent Darlington pairs with on-chip base resistors (2.7kΩ), open-collector outputs, and common-cathode clamp diodes tied to the COM pin. Each channel operates with VI(ON) ≤ 3.0V at IC = 300mA and VCE(SAT) ≤ 1.6V at II = 500µA.

It supports operation from -40°C to +105°C ambient, delivers tPLH/tPHL ≤ 10µs across temperature, and maintains ICEX ≤ 100µA at 50V and +105°C - enabling reliable relay and motor driver staging in non-automotive industrial environments.

Key Specifications

Pinout & Package

ULN2003AS16-13 is housed in a standard SO-16 (Type SM) surface-mount package (9.9mm × 3.9mm, 1.6mm height), RoHS-compliant, matte tin-plated leads, moisture sensitivity level 3 per J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ULN2003AFS16-13, the ULN2003AS16-13 offers identical functionality in a thinner SO-16 variant (1.26mm vs. 1.75mm), easing height-constrained designs; versus STPIC6C595TR, it provides higher current, integrated clamping, and parallel logic interface - eliminating firmware overhead and external protection components.

Availability

ULN2003AS16-13 is available at Aetrix Electronics and suitable for industrial relay control, LED display driving, and thermal print head interfacing requiring stable component supply and long-term production continuity.

Supply support for ULN2003AS16-13 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

Diodes Incorporated is a global semiconductor company specializing in discrete, analog, and mixed-signal devices, with manufacturing certified to IATF 16949 and quality systems aligned to AEC-Q standards.

The ULN2003A belongs to Diodes' legacy high-voltage Darlington array product line, designed specifically for industrial and commercial load-driving applications where simplicity, ruggedness, and cost-effective integration of clamping and logic compatibility are essential.

FAQ

What is the maximum simultaneous channel count supported at full 500mA per channel?

At TA = +25°C, all 7 channels can operate continuously at 500mA. At TA = +70°C, full 500mA is supported for up to 4 channels simultaneously; derating follows the datasheet's N-output curve - e.g., 7 channels limited to ~350mA at +70°C per the "Maximum Collector Current vs. Duty Cycle" graph.

Can ULN2003AS16-13 drive inductive loads without an external flyback diode?

Yes - the integrated common-cathode clamp diodes (connected to the COM pin) provide complete flyback suppression when COM is tied to the positive supply of the inductive load. No external diodes are needed for standard relay, solenoid, or motor coil driving per the functional block diagram and application notes.

Is ULN2003AS16-13 pin-compatible with ULN2003A variants in TSSOP-16 or SO-16 (Type SM)?

Yes - ULN2003AS16-13 (SO-16), ULN2003AFS16-13 (SO-16 Type SM), and ULN2003AT16-13 (TSSOP-16) share identical pin numbering, pin functions, and electrical specifications. Only mechanical dimensions and moisture sensitivity differ - making them drop-in replacements at the circuit level.

Does ULN2003AS16-13 support 3.3V logic input levels reliably?

Yes - with VI(ON) ≤ 2.7V at IC = 250mA and typical II = 0.93mA at VI = 3.85V, the device fully turns on from 3.3V CMOS outputs. Measured VI(ON) remains ≤2.9V across -40°C to +105°C, ensuring robust activation even under worst-case voltage and temperature conditions.