DESCRIPTION

The M74HC74 is an high speed CMOS DUAL D TYPE FLIP FLOP WITH CLEAR fabricated with silicon gate C2MOS technology.

A signal on the D INPUT is transferred on the Q OUTPUT during the positive going transition of the clock pulse. CLEAR and PRESET are independent of the clock and accomplished by a low on the appropriate input. All inputs are equipped with protection circuits against static discharge and transient excess voltage.

■ HIGH SPEED : fMAX= 67MHz (TYP.) at VCC= 6V

■ LOW POWER DISSIPATION: ICC=2μA(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 74

M74HC74B1R屬于集成電路（IC） > 觸發(fā)器。意法半導(dǎo)體（ST）集團制造生產(chǎn)的M74HC74B1R觸發(fā)器觸發(fā)器是能夠存儲單個邏輯狀態(tài)或信息“位”的基本數(shù)字存儲器件。這些器件至少有兩個輸入；一個或多個用于傳遞要存儲的數(shù)據(jù)，另一個用于指示存儲該數(shù)據(jù)的時間點。不同的觸發(fā)器類型，例如 D（延遲）、SR（置位復(fù)位）和 JK，對提供給其輸入的信號有不同的響應(yīng)，可用于實現(xiàn)不同的邏輯功能。這些器件與鎖存器的不同之處在于它們是邊緣敏感器件，其保持的邏輯狀態(tài)僅在接收到有效時鐘信號時才會改變。