It is the output from the inverting oscillator amplifier. Relay drivers 7.3 introduction IC, ULN2003A description: No. of:16 Pins, Temperature, Operating Range:-20°C to +85°C Transistor Polarity:NPN Transistors, No. of:7 Case Style:DIP-16 Temp, Op. Min:-20°C Temp, Op. Max:85°C Base Number:2003 Channels, No. of:7 Current, Output Max:500mA Device Marking:ULN2003A IC Generic Number:2003 Input Type:TTL, CMOS 5V Logic Function Number:2003 Output Type: Open Collector Transistor Type: Power Darlington Voltage, Input Max:5V Voltage, Output Max:50V 7.3.1 PIN CONNECTIONS OF ULN2003:
It is the output from the inverting oscillator amplifier. Relay drivers 7.3 introduction IC, ULN2003A description: Pins, No. of:16 Temperature, Operating Range:-20°C to +85°C Transistor Polarity:NPN Transistors, No. of:7 Case Style:DIP-16 Temp, Op. Min:-20°C Temp, Op. Max:85°C Base Number:2003 Channels, No. of:7 Current, Output Max:500mA Device Marking:ULN2003A IC Generic Number:2003 Input Type:TTL, CMOS 5V Logic Function Number:2003 Output Type: Open Collector Transistor Type: Power Darlington Voltage, Input Max:5V Voltage, Output Max:50V 7.3.1 PIN CONNECTIONS OF ULN2003:
56239088-Automatic-Unmanned-Railway.docx