Single-gate buffer for mixed-voltage signal conditioning
The Texas Instruments SN74LVC1G34YZTR is a single-gate non-inverting buffer from the 74LVC logic family, in a 5-bump DSBGA package. The push-pull output delivers 32mA source and sink, enough to drive a modest LED, a logic input fan-out of several loads, or a short PCB trace.
The wide supply range is the headline feature. A 1.8V microcontroller talking to a 3.3V peripheral? This buffer sits between them, powered from the 3.3V rail, and the input thresholds track the supply so a 1.8V logic-high is recognised as a valid high. The same part works in a 5V legacy bus without a separate level shifter. One line item on the BOM covers multiple voltage interfaces, which simplifies procurement and qualification.
32mA output drive — enough for real loads
The 32mA push-pull output is not just for logic fan-out. It can directly drive a small indicator LED with a series resistor, or buffer a clock signal across a short backplane trace. The symmetrical source and sink current means the output waveform stays balanced, reducing duty-cycle distortion on a 1 MHz clock line. For heavier loads, the same family offers 50mA variants, but for most board-level buffering 32mA is the sweet spot.
No last-time-buy notice, no end-of-life schedule. This part is qualified for ongoing production and new designs. The 5-DSBGA package is a standard TI offering, so supply continuity is solid. For dual-sourcing, the same die is available in SOT-23 and SC-70 packages (SN74LVC1G34DBVR, SN74LVC1G34DCKR) if the board can accommodate a larger footprint.