7-bit 50V 500mA TTL-input NPN darlington driver.
The drivers need no power supply; the VDD pin is the common cathode of the seven integrated protection diodes.
+----------+ +-------+
A0 |1 +--+ 16| /Y0 | A |/Y |
A1 |2 15| /Y1 |---+---|
A2 |3 14| /Y2 | 0 | Z |
A3 |4 ULN 13| /Y3 | 1 | 0 |
A4 |5 2003 12| /Y4 +-------+
A5 |6 11| /Y5
A6 |7 10| /Y6
GND |8 9| VDD
+----------+