WMSIC Electronic Components

TECH PUBLIC NE555DR

ModelNE555DR
PackageSOP-8
BrandTECH PUBLIC
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

18 specifications

Core information

Product name
TECH PUBLIC NE555DR
Type
TECH PUBLIC
Minimum package
2500 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
TECH PUBLIC
Electronic Component
NE555DR
Electronic Component
1
Package
SOP-8
Electronic Component
555 Timer
Electronic Component
0.192g
Electronic Component
1
Features
positions
Electronic Component
BM0227776278
Electronic Component
1
Operating Voltage
4.5V~16V
Operating Current
3mA
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.

NE555DR 产品概述

一、产品简介

NE555DR 是 TECH PUBLIC(台舟电子)提供的一颗单次定时器/振荡器芯片,封装为 SOP-8。器件工作电压范围为 4.5V 至 16V,静态工作电流典型值约 3mA。功能上支持占空比可调的振荡、复位(关断)控制等,适合多种定时、脉冲和占空比调制应用。

二、主要功能与特性

  • 单通道定时器/振荡器(1 个定时器)。
  • 可配置为施密特触发的一稳(单稳)或无稳(占空比可调)工作模式。
  • 复位(RESET)引脚用于强制关断输出,低电平有效,便于系统级控制或省电。
  • 控制(CTRL)引脚可用于调节阈值电平,实现占空比或脉冲宽度的外部调制。
  • 封装:SOP-8,便于表面贴装和自动化生产。

三、典型电路与计算公式

  • 无稳(astable)振荡频率:f ≈ 1.44 / ((RA + 2·RB)·C)
    占空比 D ≈ (RA + RB) / (RA + 2·RB)
  • 单稳(monostable)脉冲宽度:t ≈ 1.1 · R · C 这些通用公式便于快速估算元件值并进行调试。

四、引脚说明(SOP-8)

  • 1 GND:接地
  • 2 TRIG:触发输入(低电平触发)
  • 3 OUT:输出
  • 4 RESET:复位/关断(低电平有效)
  • 5 CTRL:控制电压输入(可接去耦电容以稳定阈值)
  • 6 THR:阈值输入
  • 7 DISCH:放电管脚(用于与电阻、电容构成 RC 网络)
  • 8 VCC:供电(4.5V–16V)

五、设计与布局建议

  • 在 VCC 与 GND 之间放置 0.01µF 陶瓷去耦,且靠近芯片引脚布局,以抑制瞬态噪声。
  • CTRL(引脚5)常接 0.01µF 到地以稳定比较器参考,便于减少输出抖动。
  • 输出驱动大功率负载时建议外接缓冲或驱动器,避免在 SOP-8 封装上长时间大电流工作导致温升。
  • 在需要精确定时或低漂移的场合,选用低漏电、低温漂的电阻与电容。

六、典型应用

  • 定时延迟、脉冲延长
  • LED 闪烁器、声响发生器
  • 占空比可调的 PWM 源(低功率电机或舵机控制)
  • 脉冲整形与频率合成

NE555DR 以其简单、可靠、用途广泛而被广泛采用,适合工业控制、消费电子及教学实验等场景。购买时请参考台舟电子的产品文档获取完整的电气特性与可靠性数据。

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