CD74HC243集成电路（IC）的缓冲器驱动器接收器收发器规格书PDF中文资料

CD74HC243属于集成电路（IC）的缓冲器驱动器接收器收发器。由德州仪器制造生产的CD74HC243缓冲器，驱动器，接收器，收发器逻辑缓冲器、驱动器、接收器和收发器允许隔离对某个电路的逻辑信号的访问，以用于另一电路。缓冲器将其输入信号（不变或反相）传递到其输出，并可能用于清除弱信号或驱动负载。在布尔逻辑仿真器中，缓冲器主要用于增加传播延迟。逻辑接收器和收发器允许在数据总线之间进行隔离通信。

1 Features

• Typical propagation delay (A to B, B to A) of 7ns at

VCC = 5 V, CL = 15pF, TA = 25oC

• Three-state outputs

• Buffered inputs

• Fanout (over temperature range)

– Standard outputs : 10 LSTTL loads

– Bus driver outputs : 15 LSTTL loads

• Wide operating temperature range : -55oC to

125oC

• Balanced propagation delay and transition times

• Significant power reduction compared to LSTTL

logic ICs

• HC types

– 2 V to 6 V Operation

– High noise immunity: NIL = 30%, NIH = 30% of

VCC at VCC = 5V

• HCT types

– 4.5 V to 5.5 V operation

– Direct LSTTL input logic compatibility, VIL= 0.8

V (Max), VIH = 2 V (Min)

– CMOS input compatibility, Il ≤ 1μA at VOL, VOH

2 Description

The CDx4HC243 and CDx4HCT243 are quad bus

transceivers with 3-state outputs. The OEA and OEB

inputs control both the high-impedance state as well

as the direction of communication through the device.