4723DC

Dual 4-Bit Addressable Latch manufactured by Fairchild Semiconductor (and widely cross-licensed under the 4000-series standard layout). This specialized CMOS logic component incorporates two independent 4-bit storage registers that accept data over a shared bus pathway. It functions by utilizing a 2-bit binary input channel to target one of four internal latch coordinates, locking the binary bit present on its dedicated data pin into that single address layer while preserving the remaining memory states across parallel output lines. It was heavily implemented to expand input/output data ports in vintage 8-bit computers, drive segmented display indicators, and coordinate multi-relay matrix drivers in industrial machinery controls. (Industry Equals: Fairchild 4723DC, National Semiconductor CD4723BMJ, Texas Instruments CD4723BF, Motorola MC14723BAL, NXP HEF4723BF, STMicroelectronics HCF4723BF).