丝印MD7IC2100N-MD7IC2050N-MD74SC240D-MD74LS123N-MD7220-1/B

新B74LS240D LT1081CN. STK4026II M62320FP. T

贴插74F139F-AD829JN-AD829JR-LS240-B-74F373F-74F374D

贴插MC74LS240-AD7891APZ-D8254AC-2-AD2S90APZ-B