The ULN2803C device is a 50V, 500mA Darlington
transistor array. The device consists of eight NPN Darlington pairs that feature
high-voltage outputs with common-cathode clamp diodes for switching inductive loads. The
collector-current rating of each Darlington pair is 500mA. The Darlington pairscan be
connected in parallel for higher current capability.
Applications include relay drivers, hammer
drivers, lamp drivers, display drivers (LED and gas discharge), line drivers, and logic
buffers. The ULN2803C device has a 2.7kΩ series base resistor for each Darlington pair for
operation directly with TTL or 5V CMOS devices.
The ULN2803C device is a 50V, 500mA Darlington
transistor array. The device consists of eight NPN Darlington pairs that feature
high-voltage outputs with common-cathode clamp diodes for switching inductive loads. The
collector-current rating of each Darlington pair is 500mA. The Darlington pairscan be
connected in parallel for higher current capability.
Applications include relay drivers, hammer
drivers, lamp drivers, display drivers (LED and gas discharge), line drivers, and logic
buffers. The ULN2803C device has a 2.7kΩ series base resistor for each Darlington pair for
operation directly with TTL or 5V CMOS devices.