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Related Links:

Datasheets:
2803: High-Voltage, High-Current Darlington Arrays (PDF)

Selection Guides:
LED Display Drivers,

Relay/Solenoid Drivers

when this product is updated

ULx2803
High-Voltage, High-Current Darlington Arrays

These parts have been phased out of production as of October 31, 2005. Samples are no longer available.

Features

• TTL, DTL, PMOS, or CMOS Compatible Inputs
• Output Current to 500 mA
• Output Voltage to 95 V
• Transient-Protected Outputs
• Dual In-Line Package or Wide-Body Small-Outline Package

Description

Featuring continuous load current ratings to 500 mA for each of the drivers, the ULN2803A/LW and ULQ2803A/LW high-voltage, high-current Darlington arrays are ideally suited for interfacing between low-level logic circuitry and multiple peripheral power loads. Typical power loads totaling over 260 W (350 mA x 8, 95 V) can be controlled at an appropriate duty cycle depending on ambient temperature and number of drivers turned ON simultaneously. Typical loads include relays, solenoids, stepping motors, magnetic print hammers, multiplexed LED and incandescent displays, and heaters. All devices feature open-collector outputs with integral clamp diodes.

The ULx2803A/LW has input resistors selected for operation directly with 5 V TTL or CMOS. These devices will handle numerous interface needs — particularly those beyond the capabilities of standard logic buffers.

The ULx2803A is a standard Darlington array. The outputs are capable of sinking 500 mA and will withstand at least 50 V in the OFF state. Outputs may be paralleled for higher load current capability.

Partial Schematic

Complete Part Numbers

Part Number	Package Type	RoHS Compliant	Part Composition/ RoHS Data	Temperature	Comments	Samples	Distributor Stock
ULN2803A	18-pin DIP	No	view data	-20 °C to  85 °C	discontinued	Due to warehouse relocation, samples will be unavailable until August 1, 2008. Contact your sales rep or purchase from distributor.
ULN2803LW	18-lead SOIC	No	view data	-20 °C to  85 °C	discontinued	Due to warehouse relocation, samples will be unavailable until August 1, 2008. Contact your sales rep or purchase from distributor.
ULN2803LWTR	18-lead SOIC	No	view data	-20 °C to  85 °C	discontinued	Due to warehouse relocation, samples will be unavailable until August 1, 2008. Contact your sales rep or purchase from distributor.
ULQ2803A	18-pin DIP	No	view data	-40 °C to  85 °C	discontinued	Due to warehouse relocation, samples will be unavailable until August 1, 2008. Contact your sales rep or purchase from distributor.
ULQ2803LW	18-lead SOIC	No	view data	-40 °C to  85 °C	discontinued	Due to warehouse relocation, samples will be unavailable until August 1, 2008. Contact your sales rep or purchase from distributor.
ULQ2803LWTR	18-lead SOIC	No	view data	-40 °C to  85 °C	discontinued	Due to warehouse relocation, samples will be unavailable until August 1, 2008. Contact your sales rep or purchase from distributor.
ULS2803H	18-pin DIP	--	--	-40 °C to  150 °C	discontinued	Due to warehouse relocation, samples will be unavailable until August 1, 2008. Contact your sales rep or purchase from distributor.
ULS2803R	18-pin DIP	--	--	-40 °C to  150 °C	discontinued	Due to warehouse relocation, samples will be unavailable until August 1, 2008. Contact your sales rep or purchase from distributor.

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.