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ULN2003 is a high-voltage, high-current composite transistor array consisting of seven silicon NPN composite transistors. Each pair of Darlington is connected in series with a 2.7K base resistor. It can be used with TTL and CMOS circuits at 5V operating voltage. Directly connected, you can directly process data that was previously processed using standard logic buffers. Maximum Continuous Collector Current:500 mA Maximum Collector Emitter Voltage:50 V Transistor Configuration:Common Emitter Maximum Collector Emitter Saturation Voltage:1.6 V Minimum Operating Temperature:-20 °C Maximum Operating Temperature:+85 °C Package include: 10pcs*ULN2003AN