SN74LS109AN集成电路（IC）的触发器规格书PDF中文资料

SN74LS109AN属于集成电路（IC）的触发器。由美国德州仪器公司制造生产的SN74LS109AN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。

Package Options Include Plastic “Small

Outline’ Packages, Ceramic Chip Carriers

and Flat Packages, and Plastic and Ceramic

DIPs

Dependable Texas Instruments Quality and

Reliability

description

These devices contain two independent J-K positive-

edge triggered flip-flops. A low level at the preset or

‘clear inputs sets or resets the outputs regardless of the

levels of the other inputs. When preset and clear are in-

active (high), data at the J and K inputs meeting the

setup time requirements are transferred to the outputs

on the positive-going edge of the clock pulse. Clock

triggering occurs at a voltage level and is not directly

related to the rise time of the clock pulse. Following the

hold time interval, data ar the J and K inputs may be

changed without affecting the levels at the outputs.

These versatile flip-flops can perform as toggle flip-flops

by grounding K and tying J high. They also can perform

23 D-type flip-flops if J and K are tied together.

The SN54109 and SNSALS109A are characterized for

operation over the full military temperature range of

—55°C 10 125°C. The SN74109 and SN74LS109A are

characterized for operation from 0°C to 70°C,