PC28F640J3F7 640J3F75 PC28F640J3F75 PC28F640J3F75A PC28F640J3F75A 存储IC PC28F640J3F75A(T1) PC28F640J3F75A-N PC28F640J3F75A-QS PC28F640J3F75B PC28F640J3F75B TR PC28F640J3F75BTR