1 Features
• Qualified for automotive applications
• ESD protection exceeds 200V using machine
model (C = 200pF, R = 0)
• 500mA-rated collector current (single output)
• High-voltage outputs: 50V
• Output clamp diodes
• Inputs compatible with various types of logic
• Relay-driver applications

2 Applications
• Relay drivers
• Stepper and DC brushed motor drivers
• Lamp drivers
• Display drivers (LED and gas discharge)
• Line drivers
• Logic buffers

3 Description
The ULQ200xA-Q1 devices are high-voltage highcurrent
Darlington transistor arrays. Each consists
of seven npn Darlington pairs that feature highvoltage
outputs with common-cathode clamp diodes
for switching inductive loads. The collector-current
rating of a single Darlington pair is 500mA. The
Darlington pairs can be paralleled for higher current
capability.
The ULQ2003A-Q1 has a 2.7kΩ series base resistor
for each Darlington pair, for operation directly with
TTL or 5V CMOS devices. The ULQ2004A-Q1 has a
10.5kΩ series base resistor to allow operation directly
from CMOS devices that use supply voltages of 6V to
15V. The required input current of the ULQ2004A-Q1
is below that of the ULQ2003A-Q1.