ULQ2003A STMicroelectronics Integrated Circuit (Dual-In-Line Packages) In Stock
STMicroelectronics ULQ2003A is a seven-channel Darlington transistor array with open-collector outputs and built-in flyback diodes in a 16-pin DIP package. It supports up to 500 mA continuous output current per channel and 50 V output voltage. Available in stock with worldwide shipping.
- Manufacturer
- STMicroelectronics
- Package
- Dual-In-Line Packages
- Pin Count
- 16
- Lifecycle
- ACTIVE
- Datasheet
- ULQ2003A Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.1640(MOQ 1)
- Temp Range
- -40.0°C to 105.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of ULQ2003A?
- Seven independent Darlington pairs for driving up to 7 inductive loads simultaneously
- Open-collector outputs rated for up to 500 mA per channel and 50 V for relay and motor drive
- Built-in transient suppression diodes protect against inductive kickback in relay switching circuits
- Standard TTL and CMOS compatible inputs enable direct interface with popular microcontroller logic levels
What is ULQ2003A used for?
The ULQ2003A is widely used to interface low-power microcontroller outputs with high-current inductive loads such as relays, stepper motors, and solenoids. Its 7-channel configuration is ideal for driving multi-coil stepper motors, LED arrays, and lamp drivers in industrial automation and consumer appliance control panels. The built-in flyback diodes and standard DIP-16 package make it a drop-in solution for legacy and new peripheral driver circuit designs.
What are the specifications of ULQ2003A?
| Factory Lead Time | 10Weeks |
| YTEOL | 5.62 |
| Built-in Protections | TRANSIENT |
| Driver Number of Bits | 7 |
| Input Characteristics | STANDARD |
| Interface IC Type | BUFFER OR INVERTER BASED PERIPHERAL DRIVER |
| JESD-30 Code | R-PDIP-T16 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Output Characteristics | OPEN-COLLECTOR |
| Output Current Flow Direction | SINK |
| Output Peak Current Limit-Nom | 0.5A |
| Output Polarity | INVERTED |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | DIP16,.3 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Supply Voltage-Max | 3V |
| Surface Mount | YES |
| Technology | BIPOLAR |
| Terminal Finish | Matte Tin (Sn) - annealed |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| Turn-off Time | 1 µs |
| Turn-on Time | 1 µs |
| Package | Dual-In-Line Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
| Country of Origin | Mainland China |
Where can I find the ULQ2003A datasheet?
ULQ2003A Datasheet DownloadOfficial datasheet from STMicroelectronics
What are equivalent replacements for ULQ2003A?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How much continuous output current can each channel of the ULQ2003A sink?
Each Darlington channel of the ULQ2003A can sink up to 500 mA of continuous collector current, with a maximum output voltage of 50 V. This makes it suitable for driving small relays, indicator lamps, and solenoids that require higher current than typical microcontroller GPIO pins can supply.
Which stepper motor control designs can use the ULQ2003A as a driver?
Unipolar stepper motors with 5 V to 12 V coil voltages and coil currents up to 500 mA per phase are well-matched to the ULQ2003A. With 7 channels available, a single ULQ2003A can drive both a 4-phase unipolar stepper and additional peripherals from one IC, reducing component count in compact automation PCBs.
Do the built-in flyback diodes in ULQ2003A eliminate external protection components for relay driving?
Yes, the ULQ2003A includes integrated transient suppression diodes connected to each output, clamping inductive kickback to the supply rail during relay de-energization. For relay coils operating up to 50 V and 500 mA, these onboard diodes typically remove the need for external Schottky or general-purpose diodes, simplifying BOM and layout.
How does the ULQ2003A's DIP-16 package compare to SOIC variants for board layout?
The DIP-16 through-hole package occupies more board area than a surface-mount SOIC-16 equivalent but offers superior ease of hand assembly and breadboard compatibility. For prototyping or low-volume production runs where 7-channel drive at 500 mA per output is needed, the DIP-16 enables fast iteration without specialized SMD tooling.
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Why Buy from FindMyChip
About STMicroelectronics
STMicroelectronics is a global semiconductor leader serving customers across the spectrum of electronics applications. ST's products are found in a wide range of applications including automotive, industrial, personal electronics, and communications.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.7700 | $0.77 |
| 10+ | $0.5600 | $5.60 |
| 100+ | $0.4600 | $46.00 |
| 500+ | $0.4400 | $220.00 |
| 1000+ | $0.1690 | $169.00 |
| 2000+ | $0.1640 | $328.00 |
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