ULN2803A

The ULN2803A is a high-voltage, high-current 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 500 mA. The Darlington pairs may 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 ULN2803A has a 2.7-kΩ series base resistor for each Darlington pair for operation directly with TTL or 5-V CMOS devices.

Collector-emitter voltage . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . .   . . . .50 V
Input voltage (see Note 1) . . . . . . . . . . . . . . . . . . . . . .. . . . . . . .  . . . . . . .30 V
Continuous collector current . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . .500 mA
Output clamp diode current . . . . . . . . . . . . . . . . . . . . . . . .. . . . . .. . . . .500 mA
Total substrate-terminal current . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . .500 mA
Total substrate-terminal current . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . .−2.5 A
Package thermal impedance, _JA (see Notes 2 and 3): DW package ..TBD°C/W
                                                                                        N package . .TBD°C/W
Operating virtual junction temperature, T_J . . . . . . . . . . . . . . .. . . . . ... . .150°C
Storage temperature range, T_stg . . . . . . . . . . . . . . . . . . . .. . .−65°C to 150°C
† Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and functional operat