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Related Links:

Datasheets:
2003 thru 2024: High-Voltage, High-Current Darlington Arrays (PDF)

Selection Guides:
Automotive ICs,

LED Display Drivers,

Relay/Solenoid Drivers

when this product is updated

ULx2003, ULx2004, ULx2023, ULN2024
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

Description

Ideally suited for interfacing between low-level logic circuitry and multiple peripheral power loads, the Series ULN20xxA/L high-voltage, high-current Darlington arrays feature continuous load current ratings to 500 mA for each of the seven drivers. At an appropriate duty cycle depending on ambient temperature and number of drivers turned ON simultaneously, typical power loads totaling over 230 W (350 mA x 7, 95 V) can be controlled. 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 ULN2003A/L and ULN2023A/L have series 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 ULN2004A/L and ULN2024A/L have series input resistors for operation directly from 6 to 15 V CMOS or PMOS logic outputs. The ULN2003A/L and ULN2004A/L are the standard Darlington arrays. 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. The ULN2023A/L and ULN2024A/L will withstand 95 V in the OFF state.

These Darlington arrays are furnished in 16-pin dual in-line plastic packages (suffix 'A') and 16-lead surface-mountable SOICs (suffix 'L'). All devices are pinned with outputs opposite inputs to facilitate ease of circuit board layout. All devices are rated for operation over the temperature range of -20°C to +85°C. Most (see matrix, next page) are also available for operation to -40°C; to order, change the prefix from 'ULN' to 'ULQ'.

Complete Part Numbers

Part Number	Package Type	RoHS Compliant	Part Composition/ RoHS Data	Temperature	Comments	Samples	Distributor Stock
ULN2003A	16-pin DIP	No	view data	-20 °C to  85 °C	discontinued as of October 31, 2005. discontinued	Contact Local Sales Representative or check distributor stock
ULN2003L	16-lead SOIC	No	view data	-20 °C to  85 °C	discontinued as of October 31, 2005. discontinued	Contact Local Sales Representative or check distributor stock
ULN2003LTR	16-lead SOIC	No	view data	-20 °C to  85 °C	discontinued as of October 31, 2005. discontinued	Contact Local Sales Representative or check distributor stock
ULQ2003A	16-pin DIP	No	view data	-40 °C to  85 °C	discontinued as of October 31, 2005. discontinued	Contact Local Sales Representative or check distributor stock
ULQ2003L	16-lead SOIC	No	view data	-40 °C to  85 °C	discontinued as of October 31, 2005. discontinued	Contact Local Sales Representative or check distributor stock
ULQ2003LTR	16-lead SOIC	No	view data	-40 °C to  85 °C	discontinued as of October 31, 2005. discontinued	Contact Local Sales Representative or check distributor stock
ULN2004A	16-pin DIP	No	view data	-20 °C to  85 °C	discontinued as of October 31, 2005. discontinued	Contact Local Sales Representative or check distributor stock
ULN2004L	16-lead SOIC	No	view data	-20 °C to  85 °C	discontinued as of October 31, 2005. discontinued	Contact Local Sales Representative or check distributor stock
ULN2004LTR	16-lead SOIC	No	view data	-20 °C to  85 °C	discontinued as of October 31, 2005. discontinued	Contact Local Sales Representative or check distributor stock
ULQ2004A	16-pin DIP	No	view data	-40 °C to  85 °C	discontinued as of October 31, 2005. discontinued	Contact Local Sales Representative or check distributor stock
ULQ2004L	16-lead SOIC	No	view data	-40 °C to  85 °C	discontinued as of October 31, 2005. discontinued	Contact Local Sales Representative or check distributor stock
ULQ2004LTR	16-lead SOIC	No	view data	-40 °C to  85 °C	discontinued as of October 31, 2005. discontinued	Contact Local Sales Representative or check distributor stock
ULN2023A	16-pin DIP	No	view data	-20 °C to  85 °C	discontinued as of October 31, 2005. discontinued	Contact Local Sales Representative or check distributor stock
ULN2023L	16-lead SOIC	No	view data	-20 °C to  85 °C	discontinued as of October 31, 2005. discontinued	Contact Local Sales Representative or check distributor stock
ULN2023LTR	16-lead SOIC	No	view data	-20 °C to  85 °C	discontinued as of October 31, 2005. discontinued	Contact Local Sales Representative or check distributor stock
ULQ2023A	16-pin DIP	No	view data	-40 °C to  85 °C	discontinued as of October 31, 2005. discontinued	Contact Local Sales Representative or check distributor stock
ULN2024A	16-pin DIP	No	view data	-20 °C to  85 °C	discontinued as of October 31, 2005. discontinued	Contact Local Sales Representative or check distributor stock
ULN2024L	16-lead SOIC	No	view data	-20 °C to  85 °C	discontinued as of October 31, 2005. discontinued	Contact Local Sales Representative or check distributor stock
ULN2024LTR	16-lead SOIC	No	view data	-20 °C to  85 °C	discontinued as of October 31, 2005. discontinued	Contact Local Sales Representative or check distributor stock

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.