Part # 74LS85 datasheet

Part Manufacturer: National Semiconductor

National Semiconductor

Part Description: 54LS85 DM54LS85 DM74LS85 4-Bit Magnitude Comparators

Part Details:

54LS85DM54LS85DM74LS85 June 1989 54LS85 DM54LS85 DM74LS854-Bit Magnitude ComparatorsGeneral DescriptionThese 4-bit magnitude comparators perform comparison of have a high-level voltage applied to the A e B input The straight binary or BCD codes Three fully-decoded decisions cascading path is implemented with only a two-gate-level about two 4-bit words (A B) are made and are externally delay to reduce overall comparison times for long words available at three outputs These devices are fully expand-able to any number of bits without external gates Words of Features greater length may be compared by connecting compara- Y Typical power dissipation 52 mW tors in cascade The A l B A k B and A e B outputs of a Y Typical delay (4-bit words) 24 ns stage handling less-significant bits are connected to the cor- Y Alternate Military Aerospace device (54LS85) is avail- responding inputs of the next stage handling more-signifi- able Contact a National Semiconductor Sales Office cant bits The stage handling the least-significant bits must Distributor for specifications 4-Bit Connection Diagram Dual-In-Line Package Magnitude Order Number 54LS85DMQB 54LS85FMQB 54LS85LMQB Comparators DM54LS85J DM54LS85W DM74LS85M or DM74LS85N See NS Package Number E20A J16A M16A N16E or W16A TL F 6379 ­ 1 Function Table Comparing Cascading Outputs Inputs Inputs A3 B3 A2 B2 A1 B1 A0 B0 A l B A k B A e B A l B A k B A e B A3 l B3 X X X

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74LS85.pdf Datasheet