WMSIC Electronic Components

HGSEMI SA555M/TR SA555M

ModelSA555M/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 24+

Available for RFQ

Technical data

Product details

18 specifications

Core information

Product name
HGSEMI SA555M / TR
Type
HGSEMI
Minimum package
2500 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
HGSEMI
Electronic Component
SA555M/TR
Electronic Component
1
Package
SOP-8
Electronic Component
555 Timer
Electronic Component
0.21g
Electronic Component
1
Features
positions
Electronic Component
BM0227566770
Electronic Component
1
Operating Temperature
40℃~+85℃
Operating Voltage
4.5V~16V
Electronic Component
Electronic Component
Electronic Component
2500

For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.

SA555M/TR 产品概述

一、概述与主要参数

SA555M/TR 是华冠(HGSEMI)出品的单通道定时器芯片,采用 SOP-8 封装,适用于通用计时与脉冲发生应用。主要电气参数:工作电压范围 4.5V 至 16V,工作温度范围 -40℃ 至 +85℃,集成复位功能和关断控制,提供稳定的定时和占空比控制能力,方便在多种嵌入式与模拟控制场景中替代标准 555 系列器件。

二、功能与引脚要点

芯片包含标准 555 功能块:触发(Trigger)、阈值(Threshold)、放电(Discharge)、比较器与反相器、输出(Output)、控制电压(Control)、复位(Reset,低电平有效)及电源脚(VCC、GND)。复位脚可实现外部强制置低将输出拉低,便于系统级关断;控制电压用于调制内部比较参考,支持频率或占空比的外部调节。

三、典型应用场景

适用于单稳/多稳态脉冲发生、方波/占空比调制、PWM 驱动、延时关断、按键防抖、蜂鸣器与声光报警、LED 闪烁、频率/占空比可调振荡等。其宽电压范畴和工业级温度使得适合工业控制、消费电子及汽车电子等领域的通用定时需求。

四、典型电路与定时计算

常见单稳态宽度:T ≈ 1.1 × R × C;占空比/频率(稳态振荡):f ≈ 1.44 / ((RA + 2RB) × C)。设计时建议选用低温漂电阻和稳定电容以保证长期定时精度。通过在控制脚施加 DC 或 AC 信号,可实现外加调制或速率控制。

五、系统集成与可靠性建议

为保证稳定工作,建议靠近 VCC 与 GND 丝印处并联 0.01–0.1µF 去耦电容,减小电源杂讯对比较器的影响;复位脚宜上拉至 VCC(通过 10kΩ 左右)并在需要关断时外接低电平;布局上放置关断和控制信号走线短且屏蔽,避免噪声耦合。选型时关注供应链及封装批号,SOP-8 封装便于手工焊接与波峰/回流生产。

六、总结

SA555M/TR 是一款兼顾传统 555 通用功能与工业级工作条件的单通道定时器,适合需要可靠复位和关断控制的通用计时、脉冲与占空比控制场合。在电源去耦、控制脚滤波与合适元件选型下,可在宽温区间内长期稳定工作。

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