M74HC40103屬于集成電路（IC）的計數(shù)器除法器。由意法半導體集團制造生產(chǎn)的M74HC40103計數(shù)器，除法器計數(shù)器和除法器 IC 是數(shù)字邏輯器件，可對輸入發(fā)生的邏輯轉(zhuǎn)換進行計數(shù)，然后使用多個并行輸出重新發(fā)送累加的計數(shù)，和/或生成單個輸出信號轉(zhuǎn)換，從而對應(yīng)用某些整數(shù)數(shù)量輸入信號轉(zhuǎn)換進行響應(yīng)。除了簡單的事件計數(shù)，它們還可用于各種頻率合成應(yīng)用。

DESCRIPTION

The M74HC40103 is an high speed CMOS 8-STAGE PRESETTABLE SYNCHRONOUS DOWN COUNTER fabricated with silicon gate C2MOS technology.

The HC40103 consists of an 8 stage synchronous down counter with a single output which is active when the internal count is zero. The HC40103 contains a single 8-bit binary counter. This device has control inputs for enabling or disabling the clock, for clearing the counter to its maximum count, and for presetting the counter either synchronously or asynchronously.

■ HIGH SPEED :

fMAX = 38MHz (TYP.) at VCC = 6V

■ LOW POWER DISSIPATION:

ICC =4μA(MAX.) at TA=25°C

■ HIGH NOISE IMMUNITY:

VNIH = VNIL = 28 VCC (MIN.)

■ SYMMETRICAL OUTPUT IMPEDANCE:

|IOH| = IOL = 4mA (MIN)

■ BALANCED PROPAGATION DELAYS: tPLH ? tPHL

■ WIDE OPERATING VOLTAGE RANGE:

VCC (OPR) = 2V to 6V

■ PIN AND FUNCTION COMPATIBLE WITH 74 SERIES 40103