Automotive-grade hex inverter with Schmitt-trigger inputs
It integrates six independent inverter circuits, each with a single input, in a compact 14-WFQFN exposed-pad package measuring 3x2.5 mm. The Schmitt-trigger inputs provide hysteresis that cleans up noisy or slow-rising digital signals, making this part suitable for interfacing with sensors, switch debouncing, and oscillator circuits in automotive ECUs, body controllers, and ADAS modules. The wide supply range of 2V to 6V covers both 3.3V and 5V automotive rails without needing a separate level translator. The quiescent current is a maximum of 2 µA, which keeps the load on the always-on battery rail negligible in key-off scenarios.
Exposed-pad WQFN — layout checklist
The 14-WQFN package with exposed thermal pad (3x2.5 mm body) requires attention during PCB layout. Without adequate thermal stitching, the junction temperature rises faster at the 7.8 mA per-channel output current, especially when multiple channels switch simultaneously. The supply voltage range of 2V to 6V means a single decoupling capacitor of 0.1 µF placed close to the supply pin is sufficient for most layouts, but the exposed pad also serves as the ground return — ensure the pad connects to a low-impedance ground plane. The propagation delay is 16 ns maximum at 6V with a 50 pF load, so signal-integrity margin on fast buses is adequate for typical automotive CAN and LIN interface buffering.
This removes the last-time-buy risk for new automotive program introductions. AEC-Q100 qualification is confirmed, which satisfies the PPAP documentation requirements for Tier-1 automotive suppliers. The 74HCS series is TI's automotive-enhanced version of the standard 74HC family, with extended temperature range and qualification testing per the AEC-Q100 stress criteria.