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HGSEMI LM555N
Configuration
1 options
Configuration
24+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- HGSEMI LM555N
- Type
- HGSEMI
- Minimum package
- 2000 盒
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- HGSEMI
- Electronic Component
- LM555N
- Electronic Component
- 1
- Package
- DIP-8
- Electronic Component
- 555 Timer
- Electronic Component
- 0.775g
- Electronic Component
- 1
- Features
- positions
- Electronic Component
- BM0229934265
- Electronic Component
- 1
- Operating Temperature
- 0℃~70℃
- Operating Voltage
- 4.5V~16V
- Operating Current
- 2mA
- Output Current
- 200mA
- Electronic Component
- Electronic Component
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
LM555N 产品概述
LM555N（HGSEMI 华冠）是一款单通道精密定时器，常用于时钟产生、延时控制、脉宽调制等场合。芯片封装为常见的 DIP-8，工作电压范围宽（4.5V～16V），在低功耗和中等驱动能力之间取得平衡，适合通用电子设计和教学实验板使用。
一、主要参数与性能亮点
- 定时器数：1（单精度定时器）
- 工作电压：4.5V ～ 16V，适配多种电源方案
- 输出电流：200mA（驱动能力，可直接驱动小功率负载和指示灯）
- 工作电流：典型 2mA（静态电流小，适合低功耗场合）
- 工作温度：0℃ ～ 70℃（适用于一般工业和民用环境）
- 功能特性：占空比可调振荡（Astable）、单稳态定时（Monostable）、复位功能（Reset）
二、工作模式与应用简述
- 占空比可调振荡（Astable）：通过外接两个电阻和一个电容即可构成方波振荡源，频率和占空比可用下列公式近似计算：
- 频率 f ≈ 1 / [0.693 × (RA + 2RB) × C]
- 占空比 D ≈ (RA + RB) / (RA + 2RB) 适用于脉冲发生、LED 闪烁、PWM 调光等应用。
- 单稳态定时（Monostable）：外接一个电阻和电容可实现单次延时触发，常用于延时启动、消抖、脉宽扩展等。
- 复位功能（Reset）：当复位端被拉低时，可即时使输出复位，适合系统紧急清零或外部控制时序。
三、封装与引脚
LM555N 提供标准 DIP-8 封装，便于面包板和通孔焊接。常见引脚功能包括 VCC、GND、TRIG、OUT、RESET、CTRL、THR、DISCH，便于与外部元件（电阻、电容、按键、逻辑信号）配合完成各种时序电路。
四、设计建议与注意事项
- 电源去耦：在 VCC 与 GND 之间并联 0.1µF 陶瓷电容以抑制高频噪声，提升定时稳定性。
- 复位管脚：若不使用复位功能，建议通过上拉电阻拉高至 VCC，避免误触发。
- 温度与精度：工作温度范围为 0℃～70℃，在温度变化较大或精密计时场合需考虑温漂和电容容差对定时精度的影响。
- 输出负载：虽然标称可驱动 200mA，但长期高电流输出会增加芯片发热，建议在需要驱动较大电流时使用外部功率器件（如功率晶体管或继电器驱动器）。
五、典型应用场景
- 时钟/计时器、周期性脉冲产生
- 脉宽调制与速度控制（小功率电机、LED 调光）
- 按键消抖、单次触发延时、电路复位控制
- 教学实验、电路快速原型设计
LM555N（华冠）以其通用性和易用性，仍然是电路设计中最常用的定时器之一。在实际设计时注意电源管理与散热，可以在较宽的电压范围和常温环境下稳定工作，满足多种通用时序控制需求。
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