SN54LVCH245A-SP: output rise/fall time

Part Number: SN54LVCH245A-SP

Tool/software:

Hello,

we are employing the SN54LVCH245A-SP as input / output buffer for an aerospace application. 

There's some requirement about output rise / fall time, unfortunately these parameters are not specified in the datasheet.

Where could I find this information?

Thanks

Andrea