Automotive-grade NAND gate with Schmitt-trigger clean-up
The SN74HCS10QDRQ1: The Schmitt-trigger inputs provide hysteresis that cleans up slow or noisy edges on the input lines — critical on a 12V automotive bus where a relay coil or injector driver can couple a glitch into the logic rail.
Timing and drive for a 1 MHz+ logic bus
Maximum propagation delay is 16 ns at 6V with a 50 pF load — fast enough for a 1 MHz clocked bus with reasonable fan-out. The 7.8 mA symmetric output drive (both high and low) can sink or source a standard CMOS load without external buffers. Quiescent current sits at 2 µA max — negligible for an always-on wake-up logic block that monitors ignition or door switches.
Active lifecycle, ROHS3, and compliance docs
The input logic thresholds shift with supply: low-level threshold is 1V to 3V, high-level is 1.5V to 4.2V across the 2V-6V range — design the input swing to clear these limits at the lowest supply voltage to guarantee noise margin.