1 Features

• Hysteresis on clock inputs for improved noise

immunity and increased input rise and fall times

• Asynchronous reset

• Complementary outputs

• Buffered inputs

• Typical fMAX = 60 MHz at VCC = 5 V,

CL = 15 pF, TA = 25℃

• 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 6V operation

– High noise immunity: NIL = 30%, NIH = 30% of

VCC at VCC = 5 V

• HCT types

– 4.5 V to 5.5 V operation

– Direct LSTTL input logic compatibility,

VIL = 0.8 V (max), VIH = 2 V (min)

– CMOS input compatibility, II ≤ 1 μA at VOL, VOH

2 Description

The ’HC73 and CD74HCT73 utilize silicon gate

CMOS technology to achieve operating speeds

equivalent to LSTTL parts. They exhibit the low power

consumption of standard CMOS integrated circuits,

together with the ability to drive 10 LSTTL loads.