SN7407: "Per Buffer" sink current is not explicitly stated on the datasheet and neither is "Total package" current sinking

Tool/software:

We have been looking over the SN7407 datasheet and it keeps saying that the maximum output current is 40ma, but is does explicitly say " per buffer" or Total Package dissipation. It is important for us to get clarity on this. 

We need to sink about 8ma per buffer and if the total package rating is 40ma we have exceeded this. 

So we would like clarity on the "per buffer" max sink current and the "total package" current handling.  

Thank you,

 Mike Boracci

Senior Solutions Engineer

Computer Conversions Corporation