UDN2981A
eight-channel high-voltage high-current source-driver array for lamps, relays and displays
Key details
| Part Number | UDN2981A |
|---|---|
| Manufacturer | Allegro MicroSystems |
| Category | Source Driver Array |
| Lifecycle Status | Obsolete |
| Series | UDN2981 |
| Package / Case | 18-pin PDIP |
| Pin Count | 18 |
| Operating Temperature | -20 C to +85 C class |
| Last Verified | 2026-07-24 |
Part information
UDN2981A Overview
UDN2981A is a Allegro MicroSystems eight-channel high-voltage high-current source-driver array for lamps, relays and displays supplied in 18-pin PDIP. This page uses the exact orderable code because package, grade, temperature and option suffixes can change compatibility.
Key Technical Specifications
| Channels | 8 |
|---|---|
| Output Type | High-side source driver |
| Output Voltage | 50 V class |
| Output Current | 500 mA per channel class |
| Input Compatibility | TTL and CMOS logic |
Package and Ordering Notes
The listed package is 18-pin PDIP with 18 pins, leads, lands or contacts. The featured image is a generic package illustration for form-factor identification and is not an actual date-code or lot photograph. Lifecycle is recorded as Obsolete; confirm current factory support and last-time-buy constraints before design-in.
Sourcing Guidance
UDN2981A is obsolete or discontinued. Require traceability, date-code, package-marking and storage-condition checks for remaining stock.
For an accurate quotation, include the full MPN, target quantity, acceptable date-code range, packaging format and destination. Icearth can help review traceability documents, label photos and electrical/package alignment before order placement.
Manufacturer Documentation
Technical values were checked against Allegro MicroSystems documentation. Use the linked datasheet as the controlling source and re-check revisions before PCB release or firmware qualification.
UDN2981A FAQ
What is UDN2981A?
UDN2981A is a Allegro MicroSystems eight-channel high-voltage high-current source-driver array for lamps, relays and displays. It belongs to the UDN2981 series.
What are the key specifications of UDN2981A?
Channels is 8, and Output Type is High-side source driver. Refer to the manufacturer datasheet for limits, test conditions and revision-controlled values.
What package does UDN2981A use?
UDN2981A is supplied in 18-pin PDIP with 18 pins, leads, balls or contacts. Verify the exact footprint and ordering suffix before PCB release.
Is UDN2981A still in production?
UDN2981A is obsolete or discontinued. Remaining stock should be checked for traceability, date code, package marking and storage history.
What should be checked before sourcing UDN2981A?
Confirm the complete MPN, electrical ratings, package, temperature grade and required quantity. Possible alternatives include MIC2981/82 or a current high-side source-driver array after pin and load verification, but compatibility must be verified independently.
Related part numbers
These published records are the closest catalog references to UDN2981A by manufacturer, product category, series or package. Confirm electrical ratings, pinout and ordering suffixes before substitution.
- DRV8332DKDR — three-phase PWM motor driver with three independent half bridges and cycle-by-cycle protection Related by the same driver product group.
- DRV8432DKDR — dual full-bridge PWM motor driver for stepper and brushed-DC motor applications Related by the same driver product group.
- DS2480B+ — UART-to-1-Wire line driver with selectable communication speed and strong pullup control Related by the same driver product group.
- DS26C31TM — quad differential line driver for balanced RS-422 and RS-485 digital data transmission Related by the same driver product group.
Lifecycle and sourcing review
This part has a legacy lifecycle status. Submit the exact MPN, quantity, delivery destination and date-code requirements for a sourcing review.
UDN2981A is obsolete or discontinued. Require traceability, date-code, package-marking and storage-condition checks for remaining stock.
Potential alternative part numbers
Verify package, pinout, voltage, firmware behavior and qualification before substitution.