74LS85 Datasheet | onsemi

SN74LS85 4-Bit Magnitude parator The SN74LS85 is a 4-Bit Magnitude Camparator which pares 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 pare 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 parator, as shown in Figure 1. Refer to Applications section of data sheet for high speed method of paring 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 parison - OA > B, OA < B, and OA = B Outputs Available GUARANTEED OPERATING RANGES Symbol VCC TA IOH IOL Parameter Supply Voltage Operating Ambient Temperature Range Output Current - High Output Current - Low Min 4.75 0 Typ 5.0 25 Max 5.25 70 - 0.4 8.0 Unit V °C m A m A http://onsemi. LOW POWER SCHOTTKY 16 1 PLASTIC N SUFFIX CASE 648 16 1 SOIC D SUFFIX CASE 751B ORDERING INFORMATION Device SN74LS85N SN74LS85D Package 16 Pin DIP 16 Pin Shipping 2000 Units/Box 2500/Tape & Reel © Semiconductor ponents Industries, LLC, 1999 December, 1999 - Rev. 6 Publication Order Number: SN74LS85/D SN74LS85 CONNECTIO...