特性 Features

? Buffered Common Clock

? Buffered Inputs

? Typical Propagation Delay at CL = 15pF,

VCC = 5V, TA = 25oC

- 14 ns (HC Types

- 16 ns (HCT Types)

? 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

- 2V to 6V Operation

- High Noise Immunity: NIL = 30%, NIH = 30%of VCC at

VCC = 5V

? HCT Types

- 4.5V to 5.5V Operation

- Direct LSTTL Input Logic Compatibility,

VIL= 0.8V (Max), VIH = 2V (Min)

- CMOS Input Compatibility, Il ≤ 1μA at VOL, VOH

描述 Description

The ’HC377 and ’HCT377 are octal D-type flip-flops with a

buffered clock (CP) common to all eight flip-flops. All the flipflops

are loaded simultaneously on the positive edge of the

clock (CP) when the Data Enable (E) is Low.