High-Speed CMOS Logic 4-Bit Binary Full Adder with Fast Carry

1 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
- 2 V to 6 V operation
- High noise immunity: N_IL = 30%, N_IH = 30% of V_CC at V_CC = 5 V
HCT types
- 4.5 V to 5.5 V operation
- Direct LSTTL input logic compatibility,
  V_IL = 0.8 V (max), V_IH = 2 V (min)
- CMOS input compatibility, I_I ≤ 1 µA at V_OL, V_OH