Active single-gate buffer with open-drain output
The SN74LVC1G07DBVRG4: The open-drain output sinks 32mA.
Because the output is open-drain, the SN74LVC1G07DBVRG4 cannot source current; it only pulls the output low. This makes the part a simple level shifter — for instance, a 1.8V input can drive a 5V output by pulling up to 5V. The 32mA sink capability is sufficient for driving low-current loads such as small relays, optocouplers, or LED indicators without an extra transistor.
For dual-sourcing flexibility, pin-compatible alternatives exist within the 74LVC1G07 family from TI and other vendors, though the exact order code should be verified against the BOM.
