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SN74HCS72DR_TI(德州仪器)中文资料_英文资料_价格_PDF手册

2024/7/8 15:35:02

256

SN74HCS72DR

具有清零和预置端的施密特触发输入双路负边沿触发式 D 型触发器

 

 


                                                     

 

 

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1 Features

 

• Wide operating voltage range: 2 V to 6 V

• Schmitt-trigger inputs allow for slow or noisy input signals

• Lowpower consumption

– Typical ICC of 100 nA

– Typical input leakage current of ±100 nA

• ±7.8-mA output drive at 5 V

• Extended ambient temperature range:–40°C to  125°C, TA

 

 

 

 

2 Applications

 

• Convert a momentary switch to a toggle switch

• Input slow edge-rate signals

• Operate in noisy environments

• Enable CAN Controller Power with wake-up pattern

 

 

                              


 

3 Description

 

This device contains two independent D-type negative-edge-triggered flip-flops. All inputs include Schmitt-triggers, allowing for slow or noisy input signals. A low level at the preset (PRE) input sets the output high. A low level at the clear (CLR) input resets the output low. Preset and clear functions are asynchronous and not dependent on the levels of the other inputs. When PRE and CLR are inactive (high), data at the data (D) input meeting the setup time requirements is transferred to the outputs (Q, Q) on the negative-going edge of the clock (CLK) pulse. Following the hold-time interval, data at the data (D) input can be changed without affecting the levels at the outputs (Q, Q).