DESCRIPTION
A 1-2-4-8 BCD code applied to inputs A0 to A3 causes the selected output to be HIGH, the other nine will be LOW. If desired, the device may be used as a 1-of-8 decoder with enable; 3-bit octal inputs are applied to inputs A0, A1 and A2 selecting an output O0 to O7. Input A3 then becomes an active LOW enable, forcing the selected output LOW when A3 is HIGH. The outputs are fully buffered for best performance. HEF4028B MSI Fig.1 Functional diagram. HEF4028BP(N): HEF4028BD(F): HEF4028BT(D): 16-lead DIL; plastic (SOT38-1) 16-lead DIL; ceramic (cerdip) (SOT74) 16-lead SO; plastic (SOT109-1) ( ): Package Designator North America PINNING Fig.2 Pinning diagram. A0 to A3 O0 to O9 address inputs, 1-2-4-8 BCD outputs (active HIGH) FAMILY DATA, IDD LIMITS category MSI See Family Specifications January 1995 2 Philips Semiconductors Product specification 1-of-10 decoder HEF4028B MSI Fig.3 Logic diagram. January 1995 3 Philips Semiconductors Product specification 1-of-10 decoder TRUTH TABLE INPUTS A3 L L L L L L L L H H H H H H H H Notes 1.
NXP Semiconductors
