Texas Instruments DS2003TM

Overview

DS2003TM from Texas Instruments is a 7-channel high-voltage, high-current Darlington array IC designed for low-side switching in industrial interface applications. It features open-collector NPN Darlington outputs with integrated suppression diodes, 50 V output voltage rating, 350 mA continuous sink current per channel, and TTL/CMOS-compatible input logic - used to drive relays, solenoids, and LED arrays in programmable logic controllers and factory automation systems.

For engineers reviewing the DS2003TM datasheet, DS2003TM pinout, DS2003TM application, or DS2003TM equivalent, key selection considerations include its −40°C to +125°C operating temperature range, built-in clamp diodes for inductive load protection, 1.6 V max V_CE(Sat) at 350 mA, and SOIC-16 package compatibility with legacy control board layouts.

Technical Context

The DS2003TM integrates seven independent Darlington pairs, each with a series base resistor enabling direct TTL/CMOS interfacing at 5 V without external biasing. Each channel provides open-collector sinking capability with internal flyback diodes connected from OUTx to COMMON.

It operates as a monolithic low-side driver array where all emitters are internally tied to COMMON (Pin 16), and all collectors route to individual OUT pins (Pins 9–15). Input signals applied to Pins 1–7 control respective outputs with VI(ON) ≤ 3.0 V and II(ON) ≈ 1.35 mA at 3.85 V.

Key Specifications

Pinout & Package

DS2003TM is housed in a 16-pin SOIC (Package Drawing D) with 1.27 mm pitch, JEDEC MS-012AC compliant, and RoHS-compliant green finish (CU SN).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ULN2003A and TD62003FG, DS2003TM uniquely combines extended temperature operation (−40°C to +125°C), integrated clamp diodes, and verified 350 mA sink capability in a drop-in SOIC-16 package - making it optimal for thermally demanding control applications where reliability and component count reduction are critical.

Availability

DS2003TM is available at Aetrix Electronics and suitable for industrial PLC I/O modules, factory automation relay interfaces, and embedded HMI status indication requiring stable component supply across extended temperature ranges.

Supply support for DS2003TM 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

Texas Instruments is a global semiconductor company specializing in analog, embedded processing, and digital signal technologies with over 50 years of industrial interface innovation.

The DS2003TM belongs to TI's legacy high-voltage Darlington driver family, engineered specifically for robust, low-component-count interfacing between logic-level controllers and industrial 24 V DC loads.

FAQ

What is the maximum continuous sink current per channel for DS2003TM?

The DS2003TM supports 350 mA continuous sink current per channel at 70°C ambient with 20 ms pulse width and 30% duty cycle, as validated in the datasheet Figure 4. At full DC operation, thermal limits reduce practical sustained current to ~250 mA per channel in standard SOIC-16 mounting. Derating curves in the DS2003TM datasheet specify exact limits based on ambient temperature and number of simultaneously active channels.

Does DS2003TM include built-in protection diodes for inductive loads?

Yes, DS2003TM integrates clamp diodes from each OUT pin to the COMMON pin (Pin 16), eliminating the need for external flyback diodes when driving relays, solenoids, or other inductive loads. This feature is explicitly confirmed in the "Features" section and Equivalent Circuits diagram (Figure 6) of the DS2003TM datasheet SNLS394J.

Is DS2003TM pin-compatible with ULN2003A?

Yes, DS2003TM is pin-compatible with ULN2003A - both use identical SOIC-16 pinout (IN A–G, GND, OUT A–G, COMMON) and share the same logic-level input thresholds and open-collector output structure. However, DS2003TM extends the operating temperature range to +125°C versus ULN2003A's +85°C limit, making it suitable for higher-ambient environments without layout changes.

What is the input voltage range supported by DS2003TM?

The DS2003TM accepts input voltages from −0.3 V to 30 V, with guaranteed turn-on at VI(ON) ≤ 3.0 V (tested at IC = 300 mA) and turn-off at VI(OFF) ≥ 0.9 V. Its internal base resistors allow direct interfacing with 5 V TTL/CMOS logic without external components, and the wide input range accommodates noise-tolerant industrial signaling.

Can multiple DS2003TM outputs be paralleled to increase current capacity?

Yes, the DS2003TM datasheet explicitly states that outputs may be paralleled to accommodate sink currents beyond 350 mA per channel. When paralleling, ensure matched trace lengths and thermal coupling to avoid current imbalance; total current must remain within the device's absolute maximum junction temperature and package power dissipation limits (θ_J-A = 88°C/W).