DESCRIPTION
The M74HC646/648 are high speed CMOS OCTAL BUS TRANSCEIVERS AND REGISTERS, (3- STATE) fabricated in silicon gate C2MOS technology. They have the same high speed performance of LSTTL combined with true CMOS low power consumption.

■ HIGH SPEED
    fMAX = 73 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.)
■ OUTPUT DRIVE CAPABILITY
    15 LSTTL LOADS
■ SYMMETRICAL OUTPUT IMPEDANCE
    |IOH| = IOL = 6 mA (MIN.)
■ BALANCED PROPAGATION DELAYS
    tPLH = tPHL
■ WIDE OPERATING VOLTAGE RANGE
    VCC (OPR) = 2 V TO 6 V
■ PIN AND FUNCTION COMPATIBLE
    WITH 54/74LS646/648