Triple 3-input AND gate with Schmitt-trigger inputs
The SN74HCS11QDRQ1: The Schmitt-trigger inputs provide hysteresis on the switching thresholds: low-level is 1V to 3V, high-level is 1.5V to 4.2V across the 2V to 6V supply range. That hysteresis cleans up noisy or slow-rising input signals — a common failure signature on boards where a sensor line or switch contact bounces and the gate sees an indeterminate logic level.
Supply voltage, temperature, and output drive
Operates from 2V to 6V single supply, covering 3.3V and 5V logic rails common in automotive ECUs. Quiescent current max is 2 µA — negligible for battery-backed or always-on modules. Output drive is 7.8 mA source and sink at rated voltage — enough to switch a downstream logic input or a small LED indicator, but not a relay coil. Propagation delay is 16 ns max at 6V with a 50 pF load, so the gate handles bus speeds up to tens of MHz without timing margin issues. If a board was laid out for a 14-pin SOIC AND gate, this part drops in without a layout spin.
The AEC-Q100 automotive grade means the part carries the full PPAP documentation package — traceable date codes, qualification test reports, and PCN notification if anything changes. For a repair bench, that means the replacement you order today matches the original spec.