Dual Precision Single Supply Operational Amplifier
is this what it is you might have seen similar models like
TLC277IP
TLC277CP
by texas instruments
attached is the datasheet of TLC277IP
it might help
Did you ever read the datasheet respectively the TI product information page? They tell in detail about the used type coding. Actually I or C postfix is for temperature range, P is for DIP package. As the supply voltage specification is also temperature dependant, there may be smaller difference, however none of TLC277 variants is specified for 2.5V operation, I think.