WMSIC Electronic Components

HGSEMI LM555M/TR LM555M

ModelLM555M/TR
PackageSOP-8
BrandHGSEMI
Price Price on request Electronic component prices change quickly with market supply and demand. Please refer to the latest WMSIC quotation for current pricing.
Configuration
1 options
Configuration Date code within 2 years

Available for RFQ

Technical data

Product details

19 specifications

Core information

Product name
HGSEMI LM555M / TR
Type
HGSEMI
Minimum package
2500 编带

Technical parameters

Electronic Component
Electronic Component
Electronic Component
HGSEMI
Electronic Component
LM555M/TR
Electronic Component
1
Package
SOP-8
Electronic Component
555 Timer
Electronic Component
0.2g
Electronic Component
1
Features
positions
Electronic Component
BM0227694273
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.

LM555M/TR 产品概述

一、产品简介

LM555M/TR 是华冠(HGSEMI)推出的一款单通道定时器芯片,采用 SOP-8 封装,适用于多种定时与振荡场合。器件工作电压范围宽(4.5V~16V),静态工作电流低(典型 2mA),输出驱动能力强(最高可达 200mA),工业级常温工作范围为 0℃~+70℃。标称型号末尾的 “TR” 常表示带卷(Tape & Reel)供货,便于 SMT 自动贴片生产线使用。

二、主要技术特性

  • 定时器数:1(单通道)
  • 工作电压:4.5V ~ 16V
  • 输出电流能力:最大 200mA(可驱动小电机、继电器线圈或大功率 LED)
  • 工作电流:典型 2mA(低功耗设计,适合电池供电场合)
  • 工作温度:0℃ ~ +70℃
  • 功能特性:
    • 占空比可调的振荡(可作稳态方波源)
    • 占空比稳定(内部参考电压与阈值比较实现稳定输出)
    • 复位功能(外部复位输入,可实现外部强制复位)

三、功能说明与管脚概览

LM555M 与标准 555 定时器兼容,常见管脚包括 VCC、GND、TRIG(触发)、THR(阈值)、DIS(放电)、OUT(输出)、RESET(复位)与CTRL(控制电压)。其中:

  • TRIG/THR 配合外部电阻、电容决定单稳(触发)或多振(占空比可调)工作点;
  • RESET 为低电平有效,可在需要时强制输出复位;
  • OUT 为推挽或高电流驱动输出,适合直接驱动中小负载。

四、典型应用场景

  • 单稳/多谐振荡器(占空比/频率可调)
  • 脉冲发生与延时电路(定时延迟、超时检测)
  • PWM 简易调光与速度控制(低频 PWM 场合)
  • 蜂鸣器、报警器驱动及短时继电器驱动电路
  • 信号整形与方波生成

五、设计与使用建议

  • 电源去耦:VCC 旁接 0.1µF 陶瓷电容,靠近芯片引脚,保证振荡稳定及抗干扰能力;
  • RESET 管脚若不使用,应上拉至 VCC 保持高电平,防止误复位;
  • 出口负载:尽管 OUT 可提供高达 200mA 电流,长期大电流工作会导致芯片发热,建议外接缓冲晶体管或驱动器以降低芯片温升;
  • 布局注意:放电管脚与阈值、触发走线应尽量短,避免噪声引入导致计时误差;
  • 温度与电压裕量:在高温或供电接近上下限时,注意测试计时精度和占空比稳定性。

六、封装与采购提示

  • 常用封装:SOP-8(便于表面贴装)
  • 供货形式:片装或带卷(TR)适配不同生产需求
  • 订购时请确认批次、温度等级与出货形式,批量设计建议索取样片验证在目标系统中的实际表现。

总结:LM555M/TR 以其宽电压、低功耗、高驱动能力及丰富的定时/振荡功能,适合电子定时、波形产生与驱动类应用。合理的电源去耦与热管理能显著提升系统稳定性与可靠性。

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