3-to-8 Line Decoder
   
The TC74ACT138 is an advanced high speed CMOS 3-to-8 LINE DECODER fabricated with silicon gate and double-layer metal wiring C2MOS technology.
   
Features
• High speed: tpd = 6.0 ns (typ.) at VCC = 5 V
• Low power dissipation: ICC = 8 μA (max) at Ta = 25°C
• Compatible with TTL outputs: VIL = 0.8 V (max)
                                                  VIH = 2.0 V (min)
• Symmetrical output impedance: |IOH| = IOL = 24 mA (min)
                                                      Capability of driving 50 Ω
                                                      transmission lines.
• Balanced propagation delays: tpLH ∼ − tpHL
• Pin and function compatible with 74F138