Cheap And Discounts 5PCS New Original OPA277UA/2K5 OPA277UA OPA277U 277U 277UK SOP-8 High-precision Operational Amplifier IC Chip Wholesale. Buy Directly From Merchant Rong Chuang Xin IC Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.