M74HC4520集成电路（IC）的计数器除法器规格书PDF中文资料

M74HC4520属于集成电路（IC）的计数器除法器。由意法半导体集团制造生产的M74HC4520计数器，除法器计数器和除法器 IC 是数字逻辑器件，可对输入发生的逻辑转换进行计数，然后使用多个并行输出重新发送累加的计数，和/或生成单个输出信号转换，从而对应用某些整数数量输入信号转换进行响应。除了简单的事件计数，它们还可用于各种频率合成应用。

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