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SN74LS85N Datasheet(PDF) 1 Page - ON Semiconductor |
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SN74LS85N Datasheet(HTML) 1 Page - ON Semiconductor |
1 / 8 page © Semiconductor Components Industries, LLC, 1999 December, 1999 – Rev. 6 1 Publication Order Number: SN74LS85/D SN74LS85 4-Bit Magnitude Comparator The SN74LS85 is a 4-Bit Magnitude Camparator which compares two 4-bit words (A, B), each word having four Parallel Inputs (A0 –A3, B0 –B3); A3, B3 being the most significant inputs. Operation is not restricted to binary codes, the device will work with any monotonic code. Three Outputs are provided: “A greater than B” (OA>B), “A less than B” (OA<B), “A equal to B” (OA=B). Three Expander Inputs, IA>B, IA<B, IA=B, allow cascading without external gates. For proper compare operation, the Expander Inputs to the least significant position must be connected as follows: IA<B= IA>B = L, IA=B = H. For serial (ripple) expansion, the OA>B, OA<B and OA=B Outputs are connected respectively to the IA>B, IA<B, and IA=B Inputs of the next most significant comparator, as shown in Figure 1. Refer to Applications section of data sheet for high speed method of comparing large words. The Truth Table on the following page describes the operation of the SN74LS85 under all possible logic conditions. The upper 11 lines describe the normal operation under all conditions that will occur in a single device or in a series expansion scheme. The lower five lines describe the operation under abnormal conditions on the cascading inputs. These conditions occur when the parallel expansion technique is used. • Easily Expandable • Binary or BCD Comparison • O A>B, OA<B, and OA=B Outputs Available GUARANTEED OPERATING RANGES Symbol Parameter Min Typ Max Unit VCC Supply Voltage 4.75 5.0 5.25 V TA Operating Ambient Temperature Range 0 25 70 °C IOH Output Current – High – 0.4 mA IOL Output Current – Low 8.0 mA LOW POWER SCHOTTKY Device Package Shipping ORDERING INFORMATION SN74LS85N 16 Pin DIP 2000 Units/Box SN74LS85D 16 Pin SOIC D SUFFIX CASE 751B http://onsemi.com 2500/Tape & Reel PLASTIC N SUFFIX CASE 648 16 1 16 1 |
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