Automotive-grade quad buffer with 3-state outputs
The Texas Instruments SN74LVC126AQDRG4Q1 is a quad non-inverting buffer with 3-state outputs, part of the Automotive, AEC-Q100 qualified 74LVC logic family. It operates over the full automotive temperature range of -40°C to 125°C and accepts a supply voltage from 1.65V to 3.6V, making it compatible with 1.8V, 2.5V, and 3.3V logic domains. Each of the four independent buffers can source or sink 24mA, sufficient to drive typical automotive loads such as indicator LEDs, relay coils through a pre-driver, or signal lines on a CAN transceiver interface.
AEC-Q100 qualification and temperature range
This part carries full AEC-Q100 qualification, which means it has passed the stress tests required for automotive-grade components: extended temperature cycling, high-temperature operating life, and ESD robustness. The -40°C to 125°C operating range covers under-hood and engine-bay environments where standard commercial-grade logic would not survive. For a BOM destined for an ECU, TCU, or body-control module, this qualification is the gate — the SN74LVC126AQDRG4Q1 meets it.
Supply voltage range and logic-level translation
The 1.65V to 3.6V supply range allows this buffer to serve as a level translator between a 1.8V microcontroller and a 3.3V peripheral, or to sit on a mixed-voltage backplane. The 3-state outputs let multiple buffers share a common bus — each output goes high-impedance when the corresponding output-enable pin is deasserted. At 3.3V the 24mA drive provides clean edges into a 50pF load, which is the typical bus capacitance on a short automotive harness segment.
Package and footprint
Housed in a 14-SOIC package with a 3.90mm body width, this part uses a standard footprint shared across many 74-series logic buffers. The surface-mount package is suitable for automated assembly and rework with a hot-air station. The supplier device package is also 14-SOIC, so the land pattern is identical across the two references.
Lifecycle and sourcing
It is ROHS3 compliant.