Why the open-drain output matters for mixed-voltage buses
The Texas Instruments SN74LVC3G06DCTR is a triple inverter with open-drain outputs from the 74LVC family. Each of the three inverters can sink 32 mA, enough to drive an LED, a small relay coil, or a logic input with a clean falling edge. The 2.9 ns propagation delay at 5 V keeps signal skew tight in timing-critical paths like clock gating or reset distribution.
Sizing the pull-up resistor for the open-drain output
With a 32 mA sink rating, the pull-up resistor value is set by the output high voltage and the required rise time. For a 3.3 V rail and a 1 kΩ pull-up, the sink current is 3.3 mA — well within the 32 mA limit, and the RC time constant with a 50 pF load is about 50 ns. For faster edges, use a lower resistor value but stay above the minimum that keeps the sink current under 32 mA at the worst-case supply voltage. The 10 µA quiescent current means the device itself adds negligible idle power.
Temperature range and deployment context
The surface-mount SM8 package suits automated assembly and conformal coating for humid or dusty environments.