MM74C85

MM54C85 MM74C85 4-Bit Magnitude Comparator September 1989 MM54C85 MM74C85 4-Bit Magnitude Comparator General Description The MM54C85 MM74C85 is a four-bit magnitude comparator which will perform comparison of straight binary or BCD codes The circuit consists of eight comparing inputs (A0 A1 A2 A3 B0 B1 B2 B3) three cascading inputs (A l B A k B and A e B) and three outputs (A l B A k B and A e B) This device compares two four-bit words (A and B) and determines whether they are ‘‘greater than ’’ ‘‘less than ’’ or ‘‘equal to’’ each other by a high level on the appropriate output For words greater than four-bits units can be cascaded by connecting the outputs (A l B A k B and A e B) of the least significant stage to the cascade inputs (A l B A k B and A e B) of the next-significant stage In addition the least significant stage must have a high level voltage (VIN(1)) applied to the A e B input and low level voltage (VIN(0)) applied to A l B and A k B inputs Features Y Y Y Y Y Y Y Wide supply voltage range Guaranteed noise margin High noise immunity Low power TTL compatibility Expandable to ‘N’ stages Applicable to binary or BCD Low power pinout 54L85 74L85 3 0V to 15V 1 0V 0 4 VCC (typ ) fan out of 2 driving 74L Logic Diagram TL F 5886 – 1 C1995 National Semiconductor Corporation TL F 5886 RRD-B30M105 Printed in U S A Absolute Maximum Ratings (Note 1) If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributo...