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Related Links:

Datasheets:
UDx/A2981 and UDx/A2982: 8-Channel Source Drivers (PDF)

Selection Guides:
Power Integrated Circuits,

LED Display Drivers

when this product is updated

UDx2981, A2981, UDx2982, A2982
8-Channel Source Drivers

Features

• TTL, DTL, PMOS, or CMOS compatible inputs
• 500 mA output source current capability
• Transient-protected outputs
• Output breakdown voltage to 50 V
• DIP or SOIC packaging

Description

Recommended for high-side switching applications that benefit from separate logic and load grounds, these devices encompass load supply voltages to 50 V and output currents to -500 mA. These 8-channel source drivers are useful for interfacing between low-level logic and high-current loads. Typical loads include relays, solenoids, lamps, stepper and/or servo motors, print hammers, and LEDs.

All devices may be used with 5 V logic systems — TTL, Schottky TTL, DTL, and 5 V CMOS. The device packages offered are electrically interchangeable, and will withstand a maximum output off voltage of 50 V, and operate to a minimum of 5 V. All devices in this series integrate input current limiting resistors and output transient suppression diodes, and are activated by an active high input.

The suffix “A” indicates an 18-lead plastic dual in-line package with copper lead frame for optimum power dissipation. Under normal operating conditions, these devices will sustain 120 mA continuously for each of the eight outputs at an ambient temperature of +50°C and a supply of 15 V.

The suffix “LW” package is provided in a 20-pin wide-body SOIC package with improved thermal characteristics compared to the 18-pin SOIC version it replaces (100% pin-compatible electrically). The A2982ELW driver is available for operation over an extended temperature range, down to -40°C.

These packages are lead (Pb) free, with 100% matte-tin leadframe plating.

Typical Application

Functional Block Diagram

Complete Part Numbers

Part Number	Package Type	RoHS Compliant	Part Composition/ RoHS Data	Temperature	Comments	Samples	Distributor Stock
UDN2981A-T	18-pin DIP	Yes	view data	-20 °C to  85 °C		samples not available
A2982SLW-T	20-lead SOIC	Yes	view data	-20 °C to  85 °C		Contact Local Sales Representative
A2982SLWTR-T	20-lead SOIC	Yes	view data	-20 °C to  85 °C		Contact Local Sales Representative
UDN2982A-T	18-pin DIP	Yes	view data	-20 °C to  85 °C
A2982ELW-T	20-lead SOIC	Yes	view data	-40 °C to  85 °C		Contact Local Sales Representative
A2982ELWTR-T	20-lead SOIC	Yes	view data	-40 °C to  85 °C		Contact Local Sales Representative

Allegro's products are not to be used in life support devices or systems, if a failure of an Allegro product can reasonably be expected to cause the failure of that life support device or system, or to affect the safety or effectiveness of that device or system.