When I'm looking into datasheet for ISO7220/21A and compare it with data from ISO7420/21 I'm not understand where ISO722x have benefit compare with ISO742x.
Both have the same datarate 1Mbps and same package with pin-to pin compatibility. But that's all. Another parameters such as switching parameters, current consumptions and insulation characteristics are always better for ISO724x.
Taking into account that both have the same price on ti.com (1.05 | 1ku) could somebody point out where ISO722xA will give benefit?