• 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

The CDx4HC283 and CDx4HCT283 contain 4-bit binary adders. The HCT device has TTL-voltage compatible inputs.