customer order the LM34DZ/T7 in the past and wants to use the LM34DZ/LFT7 now. Are these the same parts? Is the LM34DZ/T7 obsolete? Is there an obsoletion letter?
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Unfortunately I don't have any record of the LM34DZ/T7 orderable.
The LM34DZ refers to the accuracy specs within the datasheet so my assumption is that these are the same parts. LFT7 is a designator for the tape and reel packaging which more information can be found in the TO-92 Packing Options/ Ordering Instructions