SN74HCS72DR集成电路（IC）的触发器规格书PDF中文资料

SN74HCS72DR属于集成电路（IC）的触发器。由德州仪器制造生产的SN74HCS72DR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。

1 Features

1• Wide operating voltage range: 2 V to 6 V

• Schmitt-trigger inputs allow for slow or noisy input

signals

• Low power 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).