Description
●The ’HC283 and ’HCT283 binary full adders add two 4-bit binary numbers and generate a carry-out bit if the sum exceeds 15.
●Because of the symmetry of the add function, this device can be used with either all active-high operands (positive logic) or with all active-low operands (negative logic). When using positive logic the carry-in input must be tied low if there is no carry-in.
●Features
●• Adds Two Binary Numbers
●• Full Internal Lookahead
●• Fast Ripple Carry for Economical Expansion
●• Operates with Both Positive and Negative Logic
●• Fanout (Over Temperature Range)
● - Standard Outputs . . . . . . . . . . . . . . . 10 LSTTL Loads
● - Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads
●• Wide Operating Temperature Range . . . -55℃ to 125℃
●• Balanced Propagation Delay and Transition Times
●• Significant Power Reduction Compared to LSTTL Logic ICs
●• HC Types
● - 2V to 6V Operation
● - High Noise Immunity: NIL= 30%, NIH= 30% of VCC at VCC= 5V
●• HCT Types
● - 4.5V to 5.5V Operation
● - Direct LSTTL Input Logic Compatibility, VIL= 0.8V (Max), VIH = 2V (Min)
● - CMOS Input Compatibility, Il ≤1µA at VOL, VOH
