Your bus signals are getting mangled because you've got no isolation between the driver and the load. The 74LS241 is an octal tri-state buffer, non-inverting, in a 20-pin package. Eight channels pass through clean, and when you pull the enable line, all outputs go high-impedance so nothing fights on the bus. Solder it in and the crosstalk stops
| brand | JAYCAR |
| category | ELECTRONICS & COMPONENTS |
| subcategory | ELECTRONIC COMPONENTS |
| part_number | 74LS241 |
| type | Octal Tri-State Buffer (Non-Inverting) |
| pin_count | 20 |
| channels | 8 |
| logic_family | LS (Low-power Schottky) |
