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XINLUDA XD74LS74
Configuration
1 options
Configuration
25+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- XINLUDA XD74LS74
- Type
- XINLUDA
- Minimum package
- 1000 管装
Technical parameters
- Electronic Component
- positionsand positions
- Electronic Component
- Electronic Component
- Electronic Component
- XINLUDA
- Electronic Component
- XD74LS74
- Electronic Component
- 1
- Package
- DIP-14
- Type
- D
- Electronic Component
- Flip-Flop
- Electronic Component
- 1.7g
- Electronic Component
- 2
- Electronic Component
- Electronic Component
- Electronic Component
- 1
- Latching
- 5ns
- Electronic Component
- BM0228585596
- Operating Temperature
- 0℃~+70℃
- Operating Voltage
- 4.75V~5.25V
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
XD74LS74 产品概述
一、产品简介
XD74LS74 是一款双路 D 型边沿触发触发器（D-type flip-flop），每通道 1 位，采用标准 TTL 电平设计，封装为 DIP-14。器件在时钟上升沿采样 D 输入并更新 Q 输出，另外提供异步置位（PRE）与复位（CLR）功能，适合通用寄存器、计数器、锁存与同步电路等数字系统应用。
二、主要技术参数
- 类型：D 型触发器（上升沿触发）
- 通道数：2（每通道 1 位）
- 工作电压：4.75V ~ 5.25V（典型 5V TTL）
- 时钟频率（推荐）：25 MHz
- 传播延迟 tpd：25 ns @ 5V，CL = 15 pF
- 输出电流：IOL（低电平驱动）= 8 mA，IOH（高电平）≈ 400 μA
- 建立时间（tsu）：20 ns；保持时间（th）：5 ns
- 工作温度：0 ℃ ~ +70 ℃
- 封装：DIP-14（XINLUDA 信路达品牌）
三、功能与时序特性
器件在时钟信号的上升沿对 D 输入进行采样，若在建立/保持窗口内满足 tsu 与 th 要求，Q 在传播延迟后翻转到 D 的状态。异步置位/复位可以立即将 Q 强制置 1 或 0（注意常见的 74LS74 PRE 与 CLR 为低有效信号，应根据具体器件资料确认极性）。对高速或临界时序电路，应严格满足建立/保持时间并注意时钟抖动与抖频的影响以防止亚稳态。
四、典型应用场景
- 并行/串行寄存器单元
- 计数器和分频器的单元存储
- 时序控制与状态机寄存器
- 时钟域跨越时的数据同步（需加防抖/双触发器方案）
- 简单锁存与触发电路的构建
五、设计与使用注意事项
- 电源去耦：在器件 VCC 与 GND 之间靠近引脚加 0.1 μF 陶瓷电容以抑制瞬态噪声。
- 负载与扇出：高电平 IOH 较小，驱动能力有限，尽量避免直接驱动大量 TTL 输入；合理规划扇出，必要时使用缓冲器。
- 时序裕量：设计时预留建立/保持裕量，处理时钟抖动和传输延迟，必要时降低时钟频率以提高可靠性。
- 异步控制：置位/复位为异步操作，切换时请确保不会与时钟采样冲突；上电复位策略推荐使用确定的复位电路。
- 温度与电压：工作环境请控制在标称温度和供电范围内，避免超限导致功能异常或永久损坏。
六、封装与引脚（DIP-14，常见排列）
常见引脚功能（以标准 SN74LS74 为参考）：
- 1 CLR (1CLR¯)、2 D1、3 CLK1、4 PR (1PR¯)、5 Q1、6 Q1¯、7 GND、
- 8 Q2¯、9 Q2、10 PR2¯、11 CLK2、12 D2、13 CLR2¯、14 VCC。
实际采购请以 XINLUDA 所提供的器件数据手册为准，确认异步控制信号极性与引脚顺序。
七、总结
XD74LS74 提供两路可靠的上升沿 D 触发存储单元，适合多种 5V 数字电路中用作寄存和时序控制。使用时关注时序约束、电源去耦和输出驱动能力，按照器件手册操作可获得稳定且可重复的系统行为。
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