特性 Features

? Maximum Frequency, Typically 60MHz

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

? Positive-Edge Clocking

? Overriding Reset

? Buffered Inputs and Outputs

? 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

描述 Description

The ’HC4015 consists of two identical, independent, 4-stage

serial-input/parallel-output registers. Each register has

independent Clock (CP) and Reset (MR) inputs as well as a

single serial Data input. “Q” outputs are available from each

of the four stages on both registers. All register stages are Dtype,

master-slave flip-flops. The logic level present at the

Data input is transferred into the first register stage and

shifted over one stage at each positive- going clock

transition. Resetting of all stages is accomplished by a high

level on the reset line.

The device can drive up to 10 low power Schottky equivalent

loads. The ’HC4015 is an enhanced version of equivalent

CMOS types.