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DESCRIPTION

The M54/74HC4518/4520 are high speed CMOS DUAL 4 BIT BINARY COUNTERS 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= 55 MHz (TYP.) at VCC=5V

.LOW POWER DISSIPATION

ICC=4μA (MAX.) AT TA=25°C

.HIGH NOISE IMMUNITY

VNIH=VNIL=28VCC(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 V TO 6 V

.PIN AND FUNCTION COMPATIBLE WITH 4520B/4518B