The TC74VHC273 is an advanced high speed CMOS OCTAL D-TYPE
FLIP FLOP fabricated with silicon gate C2MOS technology.
It achieves the high speed operation similar to equivalent Bipolar Schottky
TTL while maintaining the CMOS low power dissipation.
Information signals applied to D inputs are transferred to the Q outputs on
the positive going edge of the clock pulse.
When the CLR input is held “L”, the Q outputs are at a low logic level
independent of the other inputs.
An input protection circuit ensures that 0 to 5.5 V can be applied to the
input pins without regard to the supply voltage. This device can be used to
interface 5 V to 3 V systems and two supply systems such as battery back
up. This circuit prevents device destruction due to mismatched supply and
input voltages.

Features
 High speed: fmax = 165 MHz (typ.) at VCC = 5 V
 Low power dissipation: ICC = 4 µA (max) at Ta = 25°C
 High noise immunity: VNIH = VNIL = 28% VCC (min)
 Power down protection is provided on all inputs.
 Balanced propagation delays: tpLH ∼− tpHL
 Wide operating voltage range: VCC (opr) = 2 to 5.5 V
 Low noise: VOLP = 0.8 V (max)
 Pin and function compatible with 74ALS273