The TC74HC670A is a high speed 4-WORDS× 4-BITS REGISTER FILE fabricatedwith silicon gate C2
MOS technology. It achieves the high speed operation similar to equivalent LSTTL while maintaining the CMOS low power dissipation.

FEATUREs
•  High speed: tpd =23 ns (typ.) at VCC =5 V
•  Low power dissipation: ICC =4 μA (max) at Ta =25°C
•  High noise immunity: VNIH =VNIL =28% VCC(min)
•  Output drive capability: 10 LSTTL loads
•  Symmetrical output impedance: |IOH| =IOL =4 mA (min)
•  Balanced propagation delays: tpLH∼  − tpHL
•  Wide operating voltage range: VCC(opr) =2 to 6 V
•  Pin and function compatible with 74LS670