• Buffered inputs and outputs
• Typical propagation delay: 13 ns (data to output at V_CC = 5 V, C_L = 15 pF, T_A = 25℃)
• Serial or parallel expansion without external gating
• 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 ’HC85 and ’HCT85 are high speed magnitude comparators that use silicon-gate CMOS technology to achieve operating speeds similar to LSTTL with the low power consumption of standard CMOS integrated circuits.

These 4-bit devices compare two binary, BCD, or other monotonic codes and present the three possible magnitude results at the outputs (A > B, A < B, and A = B). The 4-bit input words are weighted (A0 to A3 and B0 to B3), where A3 and B3 are the most significant bits.