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SN74AXCH2T45: SN74AXCH2T45DCUR 规格书丝印是22IT, 我们购买的实物是22JT 请问规格书是否有变更

Part Number: SN74AXCH2T45

SN74AXCH2T45DCUR   规格书丝印是22IT,  我们购买的实物是22JT  请问实物是否正确  规格书是否有变更