MT51J256M32HF IC MT51J256M32HF-50:A MT51J256M32HF-60 MT51J256M32HF-60:A MT51J256M32HF-60:A TR MT51J256M32HF-60S:A MT51J256M32HF-70 ES:B MT51J256M32HF-70:A MT51J256M32HF-70:A TR MT51J256M32HF-70:B