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ULN2003B

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50-V, 7-ch darlington array with 3-V input capability and low cost

ULN2003B is in the process of being discontinued
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ULN2003A ACTIVE 50-V, 7-ch darlington transistor array, -20C to 70C Replacement
ULN2003AI ACTIVE 50-V, 7-ch darlington transistor array, -40 to 105C Replacement

Product details

Drivers per package 7 Switching voltage (max) (V) 50 Output voltage (max) (V) 50 Peak output current (A) 0.5 Delay time (typ) (ns) 250 Input compatibility CMOS, TTL Vol at lowest spec current (typ) (mV) 900 Iout/ch (max) (mA) 500 Iout_off (typ) (µA) 50 Rating Catalog Operating temperature range (°C) -40 to 105 FET Internal Imax (A) 0.5 Device type Low-side switches Function Automotive load dump compatibility, Inductive load compatibility
Drivers per package 7 Switching voltage (max) (V) 50 Output voltage (max) (V) 50 Peak output current (A) 0.5 Delay time (typ) (ns) 250 Input compatibility CMOS, TTL Vol at lowest spec current (typ) (mV) 900 Iout/ch (max) (mA) 500 Iout_off (typ) (µA) 50 Rating Catalog Operating temperature range (°C) -40 to 105 FET Internal Imax (A) 0.5 Device type Low-side switches Function Automotive load dump compatibility, Inductive load compatibility
PDIP (N) 16 181.42 mm² 19.3 x 9.4 SOIC (D) 16 59.4 mm² 9.9 x 6 TSSOP (PW) 16 32 mm² 5 x 6.4
  • Greater Than 4x Reduction in Output Leakage (ICEX) over ULN2003A
  • 500-mA Rated Collector Current (Single Output)
  • High-Voltage Outputs 50 V
  • Output Clamp Diodes
  • Inputs Compatible With Various Types of Logic
  • Relay-Driver Applications
  • Greater Than 4x Reduction in Output Leakage (ICEX) over ULN2003A
  • 500-mA Rated Collector Current (Single Output)
  • High-Voltage Outputs 50 V
  • Output Clamp Diodes
  • Inputs Compatible With Various Types of Logic
  • Relay-Driver Applications

The ULN2003B device is a high-voltage, high-current Darlington transistor array. This device consists of seven NPN Darlington pairs that feature high-voltage outputs with common-cathode clamp diodes for switching inductive loads. The collector-current rating of a single Darlington pair is 500 mA. The Darlington pairs can be paralleled for higher current capability.

The ULN2003B has a 2.7-kΩ series base resistor for each Darlington pair for operation directly with TTL or CMOS devices.

The ULN2003B device is a high-voltage, high-current Darlington transistor array. This device consists of seven NPN Darlington pairs that feature high-voltage outputs with common-cathode clamp diodes for switching inductive loads. The collector-current rating of a single Darlington pair is 500 mA. The Darlington pairs can be paralleled for higher current capability.

The ULN2003B has a 2.7-kΩ series base resistor for each Darlington pair for operation directly with TTL or CMOS devices.

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Technical documentation

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Type Title Date
* Data sheet ULN2003B High-Voltage, High-Current Darlington Transistor Array datasheet (Rev. B) PDF | HTML 16 Aug 2016
E-book 11 Ways to Protect Your Power Path 03 Jul 2019
Application note Stepper Motor Driving with Peripheral Drivers (Rev. A) PDF | HTML 02 Dec 2016
Application note Improved Thermal Dissipation and Energy Efficiency for Peripheral Driving 30 Oct 2014

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PDIP (N) 16 View options
SOIC (D) 16 View options
TSSOP (PW) 16 View options

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