BUY SN74LS85N https://www.utsource.net/itm/p/958714.html
These four-bit magnitude comparators perform comparison of straight binary and straight BCD (8-4-2-1) codes. Three fully decoded decisions about two 4-bit words (A, B) are made and are externally available at three outputs. These devices are fully expandable to any number of bits without external gates. Words of greater length may be compared by connecting comparators in cascade. The A > B, A < B, and A = B outputs of a stage handling less-significant bits are connected to the corresponding A > B, A < B, and A = B inputs of the next stage handling more-significant bits. The stage handling the least-significant bits must have a high-level voltage applied to the A = B input. The cascading paths of the '85, 'LS85, and 'S85 are implemented with only a two-gate-level delay to reduce overall comparison times for long words. An alternate method of cascading which further reduces the comparison time is shown in the typical application data.
Description: 4-Bit Magnitude Comparator
Features:
Four Independent Magnitude Comparators
Open Collector Outputs for Direct Interface to Other Logic Families
Outputs Directly Interface to CMOS, NMOS, and TTL
Outputs Can Be Used in Wired-OR Circuits
Input Clamp Diodes Limit High-Speed Termination Effects
Low Power Consumption
High Noise Immunity
Available in 16-Pin Plastic DIP, 16-Pin SOIC, and 16-Pin TSSOP Packages
Application:
Digital Comparators
Digital Filters
Digital Control Systems
Digital Signal Processing
Digital Timing Circuits
Digital Logic Circuits
(For reference only)
