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TAXD32768K2CGDAZT2T是雅晶鑫(YJX) 推出的一款直插式无源晶振,型号后缀明确其核心参数:基准频率32.768kHz(计时类晶振的标准频率),封装采用DT-38直插规格。作为无源晶振,其本身无内置振荡电路,需配合外部振荡模块(如MCU内部OSC、专用时钟芯片)实现谐振,是实时时钟(RTC)、低功耗计时设备的核心频率基准组件。
该晶振基准频率为32.768kHz,因32768=2¹⁵,经15次二进制分频可直接得到1Hz秒信号,是计时系统的最优选择。常温(25℃)下频差控制在**±20ppm**,即频率波动范围为32.768kHz±0.65536Hz,每日计时误差约0.05秒,满足绝大多数消费电子、工业设备的计时精度需求。
负载电容为12.5pF,是晶振谐振时需匹配的外部等效电容(含电路寄生电容)。设计时需确保振荡电路总负载电容接近12.5pF,否则会导致频率偏移或起振失败。该参数适配主流MCU(STM32、ATmega)及时钟芯片(DS1302、PCF8563)的默认设计,兼容性极强。
ESR为30kΩ,是无源晶振的关键性能指标,直接影响振荡稳定性。30kΩ处于32.768kHz无源晶振的常规合理范围,可确保多数振荡电路顺利起振,且振荡信号幅度、相位稳定。
工作温度范围内(-20℃~+70℃)频率稳定度为**±30ppm**,即温度变化导致的最大频率偏移为32.768kHz±0.98304Hz,满足一般室内、户外常温场景的环境适应性(如办公设备、家电产品)。
DT-38为标准直插式封装,引脚间距符合工业通用标准,安装方式简单(焊接固定于PCB),无需复杂贴装设备,降低生产环节成本与难度,适合对体积要求不苛刻的场景。
-20℃~+70℃的工作温度覆盖绝大多数室内、户外常温场景,无需额外温度补偿即可稳定计时。
相比有源晶振(内置振荡电路),无源晶振结构简单(仅晶体谐振器+封装),无主动电子元件,因此:
雅晶鑫(YJX)是国内专注晶体元器件研发的品牌,产品以参数一致性好、批量供货稳定著称。TAXD32768K2CGDAZT2T作为其经典32.768kHz系列,核心优势包括:
综上,TAXD32768K2CGDAZT2T是一款性能稳定、适配性强、性价比高的32.768kHz直插无源晶振,可广泛应用于各类计时类电子设备。
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