SN74LS74A是TI公司的一款D类触发器产品，SN74LS74A是具有预设和清零功能的双路 D 类上升沿触发器，本页介绍了SN74LS74A的产品说明、应用、特性等，并给出了与SN74LS74A相关的TI元器件型号供参考。
SN74LS74A - 具有预设和清零功能的双路 D 类上升沿触发器 - D类触发器 - 触发器/锁存器/寄存器 - TI公司（Texas Instruments，德州仪器）
These devices contain two independent D-type 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 inactive (high), data at the D input 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 at the D input may be changed without affecting the levels at the outputs.
The SN54' family is characterized for operation over the full military temperature range of -55°C to 125°C. The SN74' family is characterized for operation from 0°C to 70°C.
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