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The new version of the integrated circuit tester , IC tester 7440 series logic gates can be judged good or bad First, an overview : TES200 is a digital integration testing , mainly to test 74 series and 40 series integrated digital , you can test more than 200 kinds of integration. Simple to use, test logic can also determine which integrates logic gate is bad. By key operation to select the test integration. Second, product applications: ● digital integration testing ; Third, the technical parameters: No. Item Parameter Unit Remark An operating voltage of 7 ~ 12 VDC 2 Working current