SN74AUCH16244: Looking for an alternate part, as this part is obsolete.

My company and I came across SN74AUC16244ZQLR while searching for stock of the obsolete P/N SN74AUCH16244ZQLR. Are these compatible parts? We'd like to know if we can use SN74AUC16244ZQLR as a substitute for SN74AUCH16244ZQLR. I couldn't find much information between the differences in these two parts, though they do appear to be two different part families.