2. BU7266F-E2 Substitution Conclusion The BU7266F-E2 offers limited feasibility as a replacement for the ISL28214FBZ-T13. Notable differences include: a significant reduction in slew rate from 2.5 V/µs to 0.0024 V/µs (approximately 1042 times lower), a drop in gain-bandwidth product from 5 MHz to 4 kHz (1250 times lower), an increase in input offset voltage from 500 µV to 1 mV (2 times higher), and a sharp decrease in output current from 31 mA to 4 mA (7.75 times lower). This part is only suitable for extremely low-power, low-frequency applications such as static monitoring circuits and cannot handle high-speed or high-load conditions. Additionally, the package width increases from 3.90 mm to 4.40 mm, which may cause PCB layout incompatibility. Although the reduction in supply current (from 300 µA per channel to 700 nA total current) improves power efficiency, the overall performance degradation is severe. If the original design requires speed, precision, or drive capability, substitution is not advisable.