M74HC4518B1R

双十进制计数器 DUAL DECADE COUNTER

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=28%VCCMIN.

.OUTPUT DRIVE CAPABILITY

  10 LSTTL LOADS

.SYMMETRICAL OUTPUT IMPEDANCE

  |IOH|=IOL= 4 mA MIN.

.BALANCED PROPAGATION DELAYS

  tPLH=tPHL

.WIDE OPERATING VOLTAGE RANGE

  VCCOPR = 2 V TO 6 V

.PIN AND FUNCTION COMPATIBLE WITH 4520B/4518B