K8055 - Digital Output Inversion Help needed

Kits PC Related Projects
1

My K8055 is working correctly with pull up resistors giving -5v on the digital outputs. I would like to inveert the digital output to give +5 volts to operate a relay board. I could build a transistor circuit for each output but is there a single chip which could invert all eight outputs.

Thanks in anticipation

2

[quote=“Newboy”]My K8055 is working correctly with pull up resistors giving -5v on the digital outputs. I would like to inveert the digital output to give +5 volts to operate a relay board. I could build a transistor circuit for each output but is there a single chip which could invert all eight outputs.

Thanks in anticipation[/quote]
The digital outputs of the K8055 are open collector outputs. They don’t “give” anything. The K8055 only controls Vbe. You are in control of
Vce.

If you need 0=0V, 1=+5V, you may want to look into using one or two 4011s followed by transistors (if current exceeded).