Datasheet ((top)): 1458 Optocoupler

is most famously associated with the classic MC1458 / LM1458 Dual Operational Amplifier

: Typically provides high isolation levels (often cited up to 5300 Vrms for related series like HCPL-A1458) to protect sensitive logic from high-voltage transients. 1458 optocoupler datasheet

The unique hermetic sealing and high-gain characteristics of the HCPL-1458 make it suitable for specialized environments: is most famously associated with the classic MC1458