The MAX325ESA+T is a dual SPST analog switch from Analog Devices, configurable as normally-open or normally-closed per channel. It routes analog signals up to the supply rails with a maximum on-resistance of 60 ohms and channel-to-channel matching within 800 milliohms.
On-resistance of 60 ohms max adds a series resistor to the signal path. Off-leakage is 100 pA max and channel capacitance is 9 pF.
No direct replacement or second source is listed in the available records, but the part is widely used and stocked across multiple distributor channels.