Dual 4-input NAND gate — logic family fit
The 74S40PC is a dual 4-input NAND gate from Texas Instruments, implementing the standard positive-logic NAND function across two independent gates with four inputs each. This device belongs to the 74S Schottky logic family, offering higher speed than standard TTL while maintaining TTL-compatible input thresholds and output drive.
Active production — RoHS non-compliant
The part is RoHS non-compliant, meaning it contains lead (Pb) above the 0.1% threshold and is excluded from RoHS-required assemblies unless an exemption applies.