74系列芯片简介（国外英文资料）.doc

74系列芯片简介（国外英文资料） The function table 74,170, 74 ls174-by-4 register array (OC) Read/write to separate, but simultaneously read and write; The typical storage time is 20ns of four characters; Can be extended to n bit 1024 words; Collector open circuit output; 774 LS670 is similar to this circuit, only for the three-state output. Write menu. 74172 register array (three states) Independent read and write addresses can be read and written at the same time; Each has two 8-word structures; Tri-state output. 74173, 74LS173, 74HC173, 74C173, 4 class D registers (three states) The function table 74174, 74LS174, 74F174, 74ALS174, 74HC174, 74C174, 74C174, type 74C174, type 74C174, type 74C174, type 74C174, type 74C174, type 74C174, type 74C174, type 74C174, type 74C174, type 74C174, type 74C174 The function table 74175, 74LS175, 74F175, 74ALS175, 74S175, 74HC175, 74C175, 74C175 4-d type trigger (with clear end) The function table 74176 presets the decimal counter Functional table 10 (BCD) Two - five mixed in 74178, 74179 4 parallel access shift registers 178, 179, function table 74,180, 74 HC180 9 odd even generator/validators The function table 74181, 74LS181, 74S181, 74F181, 74 HC181 arithmetic logical unit/function generator There are 16 binary arithmetic operations and 16 logical operations (see table a and table b) of two 4-bit words. High speed arithmetic operations can be accomplished when using the circuit with 74182, 74S182 or 74HC182. If the circuits name is shown in the foot table, it is compatible with high or effective low data. The circuit can also be used as A comparator, and A = B is the collectors path. The function table Pin table 74182, 74 S182, 74F182, 74 HC182 advanced generator 74 H183, 74LS183, 74 HC183, save the whole additive Functional tables (each adder) 74184 BCD binary converter BCD - binary converter; Programmable generates BCD9 complement or BCD10 complement. BCD binary converter function table BCD9 or 10s complement to the function table 74185A b