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L216MK32M21L 无源晶振 32.768kHz ±20ppm 12.5pF SMD2012-4P
L216MK32M21L 无源晶振 32.768kHz ±20ppm 负载电容:7pF SMD2012
L214S400C11L L214S270A11L L216MK32M21L