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厂商:
74LS197  4-STAGE PRESETTABLE RIPPLE COUNTERS
厂商: MOTOROLA[Motorola, Inc] 查看供应商
74LS20  Dual 4-Input NAND Gate
厂商: FAIRCHILD[Fairchild Semiconductor] 查看供应商
74LS21  Dual 4-input Positive AND Gates
厂商: HITACHI[Hitachi Semiconductor] 查看供应商
74LS21DC  DUAL 4-INPUT POSITIVE AND GATE
厂商: ETC[ETC] 查看供应商
74LS21FC  DUAL 4-INPUT POSITIVE AND GATE
厂商: ETC[ETC] 查看供应商
74LS21PC  DUAL 4-INPUT POSITIVE AND GATE
厂商: ETC[ETC] 查看供应商
74LS22  DUAL 4 INPUT POSITIVE NAND GATES WITH OPEN COLLECTOR OUTPUTS
厂商: TI[Texas Instruments] 查看供应商
74LS221  LOW POWER SCHOTTKY
厂商: ONSEMI[ON Semiconductor] 查看供应商
74LS240  LOW POWER SCHOTTKY
厂商: ONSEMI[ON Semiconductor] 查看供应商
74LS241  Octal Buffers/Line Drivers/Line Receivers
厂商: HITACHI[Hitachi Semiconductor] 查看供应商

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