Diodes Incorporated ULN2004AS16-13

Overview

ULN2004AS16-13 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 10.5kΩ input resistors optimized for 6V–15V CMOS/pMOS logic compatibility. It drives relays, solenoids, thermal print-heads, and LED displays in industrial control and automation interfaces.

For engineers reviewing the ULN2004AS16-13 datasheet, ULN2004AS16-13 pinout, ULN2004AS16-13 application, or ULN2004AS16-13 equivalent, key selection criteria include input resistor value (10.5kΩ), per-channel saturation voltage (≤1.6V at 350mA), clamp diode integration, SO-16 thermal resistance (63°C/W), and logic-level compatibility with 6–15V CMOS systems.

Technical Context

The ULN2004AS16-13 implements seven independent Darlington pairs with monolithic silicon construction, each featuring a 10.5kΩ series base resistor and integrated common-cathode clamp diode tied to the COM terminal. Its input stage is designed for direct interface with 6–15V CMOS and pMOS logic families without external pull-up or current-limiting components.

Each channel delivers 500mA continuous collector current with V_CE(SAT) ≤1.6V at I_C = 350mA and I_B = 500µA, while maintaining safe operation across –40°C to +105°C ambient temperature. The common emitter (Pin 8) and common clamp (Pin 9) terminals enable centralized grounding and inductive kickback suppression across all channels.

Key Specifications

Pinout & Package

ULN2004AS16-13 uses a 16-pin Small Outline (SO-16) package with 1.27mm pitch, 10.0mm × 6.1mm body, and 1.26mm max height. Pin 1 is marked by a beveled corner or dot; pins are arranged in dual rows with inputs (1B–7B) on left and outputs (1C–7C) on right, enabling straight-through PCB routing.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ULN2003AS16-13, ULN2004AS16-13 reduces input current by >60% at 12V logic levels, lowering MCU port loading and system power; versus TD62003APG, it eliminates 7 external diodes and associated layout complexity while maintaining identical drive capability and thermal footprint.

Availability

ULN2004AS16-13 is available at Aetrix Electronics and suitable for industrial relay control, thermal print-head driving, and LED display multiplexing requiring stable component supply and long-term manufacturing continuity.

Supply support for ULN2004AS16-13 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 solutions for industrial, computing, consumer, and communications markets.

The ULN2004A belongs to Diodes' high-voltage Darlington array product line, engineered specifically for robust, low-component-count interface between logic-level controllers and high-power inductive or resistive loads.

FAQ

What logic families is ULN2004AS16-13 designed to interface with?

ULN2004AS16-13 is optimized for 6V–15V CMOS and pMOS logic families, with a 10.5kΩ internal input resistor setting typical input current to 0.35–0.5mA across that range. It is not intended for direct 3.3V or 5V TTL use-those require ULN2003A instead.

Can ULN2004AS16-13 drive multiple channels simultaneously at full current?

Yes, but thermal derating applies: with θ_JA = 63°C/W and P_D(max) ≈ 1.2W (at T_J = 150°C), simultaneous 500mA operation on more than four channels at 105°C ambient requires forced airflow or heatsinking to maintain reliability.

How is the COM pin used in inductive load applications?

The COM pin connects to the positive supply rail of all inductive loads (e.g., relay coils). When a Darlington turns off, stored energy in the coil forward-biases the internal clamp diode, routing current from the output pin through the diode to COM-diverting flyback voltage away from the transistor junction.

Is ULN2004AS16-13 qualified for automotive applications?

No-ULN2004AS16-13 is not AEC-Q100 qualified. Diodes offers automotive-grade variants (e.g., ULN2004V) with extended temperature range, PPAP support, and IATF 16949 manufacturing; contact Diodes directly for qualified alternatives.