4000B hex buffer — wide supply, wide temperature
The Texas Instruments CD4010BM is a hex non-inverting buffer from the 4000B series, offering six independent buffer elements each with a single-bit input and push-pull output.
Output drive and package fit
Output current is specified at 3mA source and 36mA sink per channel — the sink capability is an order of magnitude higher than the source, so the buffer drives heavier loads when pulling low, typical for CMOS-to-LED or CMOS-to-relay coil interfaces.
The 4000B series has been a staple CMOS logic family for decades; its wide supply tolerance and temperature range mean it cross-references to many legacy BOMs without requalification.