74ACT74集成电路（IC）的触发器规格书PDF中文资料

74ACT74属于集成电路（IC）的触发器。由意法半导体集团制造生产的74ACT74触发器触发器是能够存储单个逻辑状态或信息“位”的基本数字存储器件。这些器件至少有两个输入；一个或多个用于传递要存储的数据，另一个用于指示存储该数据的时间点。不同的触发器类型，例如 D（延迟）、SR（置位复位）和 JK，对提供给其输入的信号有不同的响应，可用于实现不同的逻辑功能。这些器件与锁存器的不同之处在于它们是边缘敏感器件，其保持的逻辑状态仅在接收到有效时钟信号时才会改变。

DESCRIPTION

The 74ACT74 is an advanced high-speed CMOS DUAL D-TYPE FLIP FLOP WITH PRESET AND

CLEAR fabricated with sub-micron silicon gate and double-layer metal wiring C2MOS tecnology.

A signal on the D INPUT is transferred to the Q and QOUTPUTS during the positive going

transition of the clock pulse.

CLEAR and PRESET are independent of the clock and accomplished by a low setting on the

appropriate input. The device is designed to interface directly High Speed CMOS systems with TTL, NMOS and CMOS output voltage levels. All inputs and outputs are equipped with protection circuits against static discharge, giving them 2KV ESD immunity and transient excess voltage.

■ HIGH SPEED: fMAX= 250MHz (TYP.) at VCC= 5V

■ LOW POWER DISSIPATION: ICC= 4µA(MAX.) at TA=25°C

■ COMPATIBLE WITH TTL OUTPUTS

VIH= 2V (MIN.), VIL = 0.8V (MAX.)

■ 50ΩTRANSMISSION LINE DRIVING CAPABILITY

■ SYMMETRICAL OUTPUT IMPEDANCE: |IOH| = IOL= 24mA (MIN)

■ BALANCED PROPAGATION DELAYS: tPLH ≅tPHL

■ OPERATING VOLTAGE RANGE: VCC(OPR) = 4.5V to 5.5V

■ PIN AND FUNCTION COMPATIBLE WITH 74 SERIES 74

■ IMPROVED LATCH-UP IMMUNITY