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原装 O970504096MEDA4SI-1 (YSO690PR 4.096MHZ 3.3V 20PPM)
O970504096MADA4SI-1 预编程振荡器 YSO690PR 4.096MHZ 1.8V 20PP
O970504096MEDA4SI-1 预编程振荡器 YSO690PR 4.096MHZ 3.3V 20PP