丝印PCA9539PWPCA9539WPPCA9540BD¥1.10去看看能良科技发布了丝印PCA9540DP PCA9540BD PCA9540AD PCA9539WP PCA9539PWPCA9539BSPCA9540BDPCA9539DWPCA9539PW¥80去看看芯片二极管三极管电容电阻集成电路发布了PCA9540AD PCA9539WP PCA9539PW PCA9539DW PCA9539BS PCA9540BD