1. Substitution Conclusion for 590GD25M0000DG The 590GD25M0000DG is a viable direct substitute for the 530GC25M0000DG. A detailed comparison confirms that the two oscillators are functionally and parametrically identical in all core aspects. Both utilize a crystal resonator, deliver a 25 MHz CMOS output, operate at 2.5V, feature an enable/disable (OE) function, and offer a frequency stability of ±7ppm. Their mechanical footprint (6-SMD, 7.0x5.0mm) and disabled-state current (75mA) are also a perfect match. The only measurable discrepancy lies in the maximum operating current: the 590GD draws 90mA compared to the original part's 88mA, a marginal increase of 2mA. In the vast majority of applications, this slight power consumption increase is negligible. It imposes no meaningful burden on power supply design and does not present an obstacle to substitution. Therefore, for standard circuit designs that are not operating at the extreme limits of power budgets or specifically targeting ultra-low-power operation, this substitution is fully feasible from electrical, functional, and mechanical compatibility standpoints.