M74HC221集成電路（IC）的多諧振蕩器規(guī)格書PDF中文資料

M74HC221屬于集成電路（IC）的多諧振蕩器。由意法半導(dǎo)體集團(tuán)制造生產(chǎn)的M74HC221多諧振蕩器多諧振蕩器是簡單的雙態(tài)器件，盡管它們的典型使用方式在很大程度上具有模擬特性，但通常被認(rèn)為是數(shù)字邏輯元器件。單穩(wěn)型也稱為“單發(fā)”，具有一種穩(wěn)定狀態(tài)；但施加觸發(fā)信號可使它們離開此狀態(tài)一段時間，該時間通常由所連接電容器的值來確定。這些器件對于去彈跳開關(guān)觸頭等應(yīng)用非常有用。非穩(wěn)型沒有穩(wěn)定狀態(tài)，在兩個狀態(tài)之間按一定頻率持續(xù)轉(zhuǎn)換，該頻率通常也是由所連接電容器的值來確定。

DESCRIPTION

The M54/74HC221/221A are high speed CMOS MONOSTABLE multivibrators fabricated with silicon gate C2MOS technology. It achieves the high speed operation similar to equivalent LSTTL while maintaining the CMOS low power dissipation. There are two trigger inputs, AINPUT (negative edge) and B INPUT (positive edge). Triggering on the B input occurs at a particular voltage threshold and is not related to the rise and fall time of the applied pulse.

■ HIGH SPEED

tPD = 25 ns (TYP) at VCC = 5V

■ LOW POWER DISSIPATION

STANDBYSTATE ICC=4 μA (MAX.) AT TA=25°C

ACTIVESTATE ICC =700μA (MAX.)AT VCC=5V

■ HIGH NOISE IMMUNITY

VNIH = VNIL = 28 VCC (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

■ WIDE OUTPUT PULSE WIDTH RANGE

tWOUT = 150 ns ～ 60 s OVER AT VCC = 4.5 V

■ PIN AND FUNCTION COMPATIBLE WITH 54/74LS221