The ’AC283 and ’ACT283 4-bit binary adders with fast carry that utilize Advanced CMOS Logic technology. These devices 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.

• Buffered Inputs
• Exceeds 2kV ESD Protection MIL-STD-883, Method 3015
• SCR-Latchup-Resistant CMOS Process and Circuit Design
• Speed of Bipolar FAST™/AS/S with Significantly Reduced Power Consumption
• Balanced Propagation Delays
• AC Types Feature 1.5V to 5.5V Operation and Balanced Noise Immunity at 30% of the Supply
• ±24mA Output Drive Current - Fanout to 15 FAST™ ICs - Drives 50 Transmission Lines
• Characterized for operation from –40° to 85°C

FAST™ is a Trademark o f Fairchild Semiconductor.

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