Other Parts Discussed in Thread: AM26C31
Tool/software:
Hello,
I am confused what the actual thermal capabilities of the UA9638C-EP are.
The device claims it is rated up to ambient temperatures of 85C. The electrical characteristics table specifies that the supply current with no load and no switching is a max of 65mA. At 5V, 65mA is 325mW. However the dissipation ratings table specifies that the power rating at 85C is 199mW. This would imply that it is not possible to run the device at Ta=85C... What in the datasheet is wrong here? Does it actually draw 65mA without a load? Seems like there are other line drivers that draw much less unloaded.
I read the answer below but it doesn't address this issue:
https://e2e.ti.com/support/interface-group/interface/f/interface-forum/925068/ua9638c-ep-tj-question?tisearch=e2e-sitesearch&keymatch=UA9638C-EP#
Thanks,
Nino